specalog for 939c hystat track-type loader, aehq3870-04
TRANSCRIPT
Operating WeightGP Bucket 9,484 kg 20,908 lbMP Bucket 10,030 kg 22,113 lb
Cat® 3046T EngineGross horsepower 74 kW 99 hpFlywheel horsepower 67 kW 90 hp
Bucket CapacitiesGP Bucket 1.2 m3 1.5 yd3
MP Bucket 1.2 m3 1.5 yd3
®®939CHystatTrack-Type Loader
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939C Track-Type LoadersOffering rugged construction and outstanding reliability to allow you to maximize productivity.
Power TrainA powerful six-cylinder Cat® 3046turbocharged engine and the newhydrostatic power train provide thepower you expect from Cat 939C track-loaders. You also get the productivityyou need to stay competitive.
Hystat system – a dual-path, closed-loophydrostatic power train provides fullpowerturn capability, stepless speedrange, dynamic braking and smoothmodulation for steering and directionalshifts. pg. 4-6
Hystat ControlYou’ll be amazed how much dirt youcan move with one hand using a 939CHystat track loader. A single joystickallows you to control speed, directionand steering, effortlessly. pg. 7
Outmaneuver every job you tackle.A single lever joystick control is all that is needed to controlspeed, direction and steering on Cat® 939C Hystat Track-type Loaders. Full powerturn capability is made possibleby maintaining power to both tracks at any ground speedor turning radius. You’ll find operating a loader of this sizehas never been easier or as much fun.
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Operator StationSuperior comfort awaits you day-in andday-out whether you opt for an opencanopy or a loader equipped with a cab.Controls are ergonomically designedand well positioned, and armrests arefully adjustable for optimum comfortand productivity. The 939C model isequipped with a new dash panel andvandalism protection guard. pg. 8-9
Bucket & Lift ArmsAvailable general purpose or multi-purpose buckets increase machineversatility. Four-plate loader towersand large, solid-plate lift arms providemaximum strength and resistanceto shock loads and loading stresses.Lift arms are reinforced with acrossmember to reduce torsionalbending during loading. pg. 10
UndercarriageWith soil conditions changing witheach job you tackle, you need anundercarriage built rugged for longwear life and low owning and operatingcosts. That’s why all 939C models arebuilt with sealed and lubricated track.Sealed-in lubricant permanently coatsthe track pin, minimizing metal-to-metal contact and virtually eliminatinginternal pin and bushing wear.Undercarriages have thicker recoilguarding for added impact resistance.New bolt-on, rear track guiding guards, further enhance rear guidingand provide extra protection againstabrasive wear. pg. 11
ServiceabilityNot only does the updated engineenclosure add to the impressive style ofthe 939C track loader, it also provideseasier access to grouped service points.Scheduled Oil Sampling (S•O•SSM)valves are located on the engine oilfilter and hydraulic filter housings foreasy oil collection by your Cat dealer. pg. 12
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✔HydraulicsPowerful Caterpillar hydraulicsprovide exceptional strength forimpressive breakout force and liftcapacity. Two 7 micron filters keepdirt out to provide long componentlife. Matched hydraulic valves andloader linkages provide precise andlasting bucket control for superior loadhandling. Hydraulic pump capacityhas been increased by 50 percent toimprove productivity. Lift cylinderdiameter has been increased toprovide 26 percent more lift force. pg. 4
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The Hystat system provides maximumperformance everyday, no matter whatyour job application. The Hystatsystem features:
� Full powerturn capability at anyground speed or turning radius;
� Stepless speed range from 0 mph tomaximum;
� Smooth modulation for steering anddirectional shifts;
� Dynamic hydrostatic brakingprovides full control of machinespeed without using brakes;
� Superior maneuverability whenworking in tight areas;
� Excellent controllability, especiallywhile operating in close quarters and
� Load sensing, which automaticallyadjusts speed and torque to matchchanging load conditions.
1 Hystat pumps. Two high pressure,variable displacement piston pumpsare attached directly to the engineflywheel housing. No U-joints orsplitter box to service.
2 Track motors. Two high pressure, 2-speed piston motors are mountedinboard of the main frame at the finaldrives.
3 XT™ hoses are well respected fortheir strength and durability and areused to connect the pumps to themotors. O-ring face seals are usedthroughout the entire Hystat systemand provide positive sealing forreliable, leak-free connections.
4 Two identical, vertically mountedhydraulic filters are easily accessibleand provide filtration for both theHystat power train and implementsystems.
5 Service brakes. Hydrostatic(dynamic) braking through machinedrive system using joystick control orcenter pedal.
Hystat Power Train SystemQuick response and acceleration plus better maneuverability decrease cycle times and increase productivity.
6 Double reduction planetary finaldrives provide high torquemultiplication between the hystatmotors and the drive sprockets.Drives are mounted independently ofthe track frames to isolate them fromground-induced shock loads.
7 Wet, multi-disc parking brakeslocated between each hydraulic trackmotor and final drive are springapplied and hydraulically released.Automatically applied when theengine stops, or operator appliedwhen the center pedal is fullydepressed.
8 Neutral-start parking brake leverdisengages transmission and engagesthe parking brakes to preventunintended machine movement.
9 Hydraulic oil cooler is an air-to-oiltype and provides cooling for thepower train and implement oil.
The Hystat system is a high pressure, dual path, closed loop hydrostatic power trainsystem. Each track is driven by a separate hydraulic circuit consisting of onevariable-displacement piston-pump, connected by XT-6™ hose and couplings toa piston motor.
Hydraulic System
� 50 percent increased pump flow provides fastercycle times, resulting in more work done per hour
� Larger lift cylinders deliver 26 percent more liftforce for tough loading applications
� Improved bucket control provides multi-functioncapabilities for fast truck loading and spreadingapplications
� Reduced bucket control lever efforts provide loweroperator fatigue
Improved for increased productivity
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3046T EngineSmooth, responsive power, excellent fuel economy and lasting reliability.
Caterpillar 3046T Diesel Engine.Designed specifically for small tomedium size earthmoving machines.The Cat six-cylinder 3046 turbochargedengine is inherently balanced, providinglow vibration, superior performance,and exceptional responsiveness. Torquerise is 25 percent at 1400 RPM. The resultis more lugging force, especially duringheavy loads.
� Direct injection fuel systemis adjustment free for reducedmaintenance. High pressure fuelinjection results in reduced fuelconsumption and emissions.
� Turbocharger improves responseand performance at low to mediumengine speeds.
� Spin-on oil and fuel filters arevertically mounted and easilyaccessible for faster maintenance.
� In-cylinder glow plugs deliverdependable starts when operating incold temperatures. Built-in temperatureswitch helps ensure lasting reliability.
� Lubrication system features anefficient, multiple-plate, water-cooledoil cooler to help prolong engine andlubricant life.
� Cooling system. A large diameterfan and full length, water-cooledcylinders, combined with excellentthermal efficiency, minimize heatrejection, prevent overheating andprolong engine life.
� Cylinder head uses replaceable valveseat inserts, valve guides and a highquality composition steel laminatedhead gasket.
� Aluminum pistons with a cast ironinsert for increased durability underhigh compression loads. Pistons havetwo compression rings and an oil ringwith a coiled expander.
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The joystick control is simple and easyto understand. With it, you will controlthe direction, speed, and steeringof your 939C Hystat track loader.The joystick is ergonomically designedto fit comfortably in the palm of yourhand. Control effort is minimal, somuch so that you might find yourselfusing your fingertips.
Direction/speed
� Forward movement. As you move thejoystick forward, the machine movesforward, traveling faster as thejoystick is moved further forwardfrom the center position.
� Reverse movement. When you movethe joystick back, the machine willmove in reverse, again travelingfaster the further the joystick ismoved back from the center position.
� Stopping. The easiest way to stop themachine is to return the joystick tothe center position. The joystick isspring-loaded and will return toneutral by itself. You may also stopthe loader by pressing the centerbrake pedal all the way down withyour foot.
� Turtle/rabbit switch. In turtle mode,the drive motors are fixed in themaximum torque position (workingmode). Switching to rabbit modechanges the drive motors to a higherspeed setting (roading mode).To activate the turtle/rabbit mode,simply use the toggle switch locatedon top of the joystick.
Steering
� Right/left movement. With themachine moving in forward orreverse, moving the joystick to theright results in the machine turningto the right; moving the joystick tothe left causes the machine to moveto the left. The more the joystick ismoved to the left or right, the tighterthe turn.
Hystat ControlSteering, machine direction and speed are combined into one control for enhanced operatorcontrollability, comfort and increased productivity.
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Take the opportunity to work comfort-ably and productively, day-in and day-out. Whether you equip your loaderwith an open canopy or an optional cab,you’ll find thoughtfully positionedcontrols and a variety of otherconvenience features.
1 Hystat joystick control gives you thepower to control steering, directionand speed all with your left hand.Easily switch from turtle/rabbit modewith the toggle switch located on topof the joystick. Activate the horn bypressing the button beneath theturtle/rabbit toggle switch.
2 Joystick hold control holds thejoystick in any forward/reverseposition, freeing the operator’sleft hand.
3 Hystat center pedal may be used toeither slow down or stop the machine.Adjustable foot rests provide a greatplace for your feet to relax whileworking.
4 Single lever lift and tilt controlimproves efficiency. Needle bearingson all major pivot points and valvespools with precision metering helpensure precise, lasting control.
5 Governor control. High to low settingallows you to set engine speed at thedesired RPM. Hystat loaders can beoperated at any RPM.
6 Dash panel has five individual,analog gauges, providing fluid leveland temperature information at aglance. All gauges are back-lighted.
7 A suspension seat is standard on all939C track loaders and is equippedwith a seat belt and an adjustablebackrest.
Operator StationErgonomically designed for your maximum comfort and productivity.
Canopy
Ease of Operation – All major machine workfunctions can be accomplished with justtwo hands.
Reduced Operator Fatigue – Low control leverefforts help increase operator productivity eachday. Day after day.
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8 Armrests are adjustable fore and aft,as well as up and down to best suityour preferred operating position.
9 Vandalism protection guarding oncanopy models folds down under thedash for storage, and is raised overthe dash and padlocked when needed.
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The pressurized cab is sealed to keepdust out and sound to a minimum,resulting in a quiet workingenvironment. Nine adjustable ventskeep air circulating and improve thecab’s heating, optional air conditioning,and defrost/defog capabilities.
10 Tinted windows. A continuous,three-piece glass windshield and alarge, single-piece door glassprovide excellent visibility to thework site. Large, sliding right andrear side windows provide excellentflow-through ventilation.
11 Control console is back-lightedand contains controls for cabtemperature, fan speed, the front/rearwindow washers, and two-speedwipers. A cigarette lighter andashtray are also included.
12 An optional Caterpillar ContourSeries seat, with a retractable seatbelt, is the premium seat option andis designed for maximum comfortand fully-adjustable support.Ergonomically shaped seat cushionsreduce pressure on the lower backand thighs, while allowingunrestricted arm and leg movement.Contour Series seats are available incloth for use in cab, or vinyl whenused in open canopy.
Other cab conveniences include:� Radio ready factory installed
components, including speakers,an antenna, and all wiring/brackets
� Tie-downs for secure lunch boxstorage
� Sunvisor� Rearview mirror� Dome light� Coat hook
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Cab
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Buckets and Lift ArmsDesigned and built for unmatched versatility, durability, and strength.
Rugged construction along withpowerful, matched hydraulics provideexcellent breakout force and liftcapacities for maximum productioncapabilities and load handling.
1 General-purpose bucket. Designedfor excavating, loading and generalpurpose work. Wide, large capacitymeans excellent track coverage andincreased production potential.
2 Multi-purpose bucket. Designed forexcavating, loading, stripping andcleaning up debris. Providesmaximum versatility and strengthto handle the toughest jobs.
3 Bolt-on cutting edge segments arereversible and extend the wear lifeof the bucket.
4 Bolt-on Corner Guard System protectsthe edges for long term wear.
5 Backdrag edge adds gradingcapability to extend machineversatility.
6 Solid-plate lift arms provide strengthand durability for excellent lift andbreakout capacities.
Replaceable bottom plates increase thebuckets’ service life.
High bucket rackback angle retainsmaterial for increased efficiency.
Sealed loader linkage increases alllinkage lube points to 50 ServiceMeter Hours.
XT-3™ hoses meet critical strength andflexibility demands for increasedreliability.
Cylinders. Large diameter hydrauliccylinders provide powerful force.Precision finished rods for minimalseal wear.
Four-plate loader tower resists shocksand loading stresses.
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UndercarriageComponents designed to provide you with maximum performance and wear life.
Undercarriage is designed and built byCaterpillar for long wear life and lowowning and operating costs.
Standard undercarriage� A general purpose undercarriage that
performs well in applications withfirm underfoot conditions.
� Standard shoe width: 406 mm (16 in)double grouser.Optional shoe width: 460 mm (18 in)double grouser.
1 Full length recoil guarding withsprocket guards and wipers assists inreducing material buildup and helpsprevent material from entering theundercarriage system for maximumcomponent wear life.
2 Front and rear track guiding guardsprovide additional protection fromabrasive material. Rear guards are abolt-on design making installationand removal easy.
3 Segmented sprocket allows replace-ment of sprocket teeth withoutsplitting the track, reducing downtimeand lowering maintenance costs.
4 Split master link features strong,serrated two half links for easy trackremoval. No driving pin is needed.
5 Sealed and Lubricated Trackeliminates internal pin and bushingwear for longer wear life. Strong,strutted links provide increasedstrength and service life.
6 Track shoes are made from heat-treated steel for strength anddurability.
7 Idlers. Heat treated idlers are sealedand lubricated to provide long life.
8 Box-section track roller frameprovides maximum structuralintegrity for increased roller framealignment, and reduces relativemotion.
9 Track rollers. Sealed and lubricatedrollers eliminate internal wear forlonger service life. Sequenced singleand double flange rollers providesuperior track link alignment.
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Zerk lube fittings allow easy lubricationof the loader linkage pivot pins toprovide long life and maintain tightlinkage.
Removable engine enclosure has abuilt-in grip handle and provides accessto vertically mounted, spin-on engineoil and fuel filters, S•O•SSM valve, andfuel priming pump.
Engine oil dipstick, oil fill and radiatorfill is easily accessed through a hingedand lockable panel on top of the hood.
Combined power train and hydraulic oilfilters are vertically mounted for cleanerchanges and are easily accessible byremoving the rear panel. An S•O•Svalve is conveniently installed on thefilter base for sampling power train oil.
Ground level sight gauge allows easycheck of hydraulic oil level.
Fuel/water separator is accessed easilythrough a hinged door located at therear of the machine.
ServiceabilityMore access and fewer maintenance requirements add up to unparalleled ease of service.
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Total Customer SupportWhen you purchase Cat equipment, you also get Caterpillar and your Cat dealer’s totalcommitment to customer support.
Your Cat dealer offers a wide range ofservices that can be set up under acustomer support agreement when youacquire a 939C Hystat loader or anyother Caterpillar equipment. The dealerwill help you choose a plan that cancover everything from machine andattachment selection to replacementintervals. The bottom line is you get thebest return on your machine investment.
Selection. Your Cat dealer can help youmake detailed comparisons of machinesyou are considering before you buy.You can compare things like expectedcomponent life, the cost of preventivemaintenance and the true cost of lostproduction. You can get preciseanswers to these questions from yourCat dealer.
Easy financing. Consider all the flexiblefinancing options your Cat dealer offersas well as day-to-day operating costs.Whether it’s rental, leasing, or purchase,your Cat dealer can meet your needs.
Maintenance. Choose from your Catdealer’s wide range of maintenanceservices at the time you acquire your939C Hystat loader. Repair optionprograms guarantee the cost of repairsup-front. Diagnostic programs such asS•O•SSM Oil Analysis and TechnicalAnalysis help you avoid unscheduledrepairs that can cost you unnecessarytime and money.
A Customer Support Agreement canenhance the value of your 939C Hystatloader by lowering your costs per unitof production and puts your Cat dealer’ssuperior support capabilities to work foryou. They are flexible and customizedto your individual needs, whether fora single machine or a whole fleet.Ask your Cat dealer for details.
Product support. Nearly all the partsneeded to support the 939C Hystatloader are already available at yourdealer’s parts counter. Cat dealers usea world-wide computer network to findin-stock parts to minimize downtime.
Replacement. Throughout the life ofyour 939C Hystat, your Cat dealer canhelp you evaluate the cost involvedwith repairing, rebuilding or replacing.You can be assured that the choice youmake will be the right one.
939C Hystat Track-Type Loader specifications14
EngineFour-stroke cycle, in-line six cylinder Cat 3046 turbocharged diesel engine.
Ratings at 2400 RPM* kW HP
Gross power 74.6 100
Net power 67.9 90
The following ratings apply at 2400 RPMwhen tested under the specific standardconditions for the specified standard:
Net Power kW HP PS
Caterpillar 67.9 91 —
ISO 9249 67.9 91 —
EEC 80/1269 67.9 91 —
SAE J1349 67.1 90 —
DIN 70020 70.1 94 95
DimensionsBore 94 mm 3.7 in
Stroke 120 mm 4.7 in
Displacement 5 liters 305 in3
*Power rating conditions� based on standard air conditions of
25°C (77°F) and 99 kPA(29.32 in Hg) dry barometer
� used 35° API gravity fuel having anLHV of 42 780 kJ/kg (18,390 Btu/lb)when used at 30°C (86°F) [ref. afuel density of 838.9 g/L(7.001 lb/U.S. gal)]
� net power advertised is the poweravailable at the flywheel when engineis equipped with fan, air cleaner,muffler and alternator
� no derating required up to 2300 m(7500 ft) altitude
Features� turbocharger� direct-injection fuel system with
individual adjustment free injectionpumps and valves
� electric fuel shutoff solenoid� one-piece head with two valves per
cylinder� composition steel laminated head
gasket� aluminum pistons with cast iron
insert, two compression rings and oneoil ring
� high carbon steel forged ironconnecting rods
� steel-backed aluminum bearings withlead-tin overlay
� seven main bearing forged crankshaft,fully counterweighted and hardened
� oil pump, gear driven from thecrankshaft
� piston cooling jets� multi-plate, water-cooled oil cooler� belt-driven water pump� conventional core radiator with
533 mm (21 in) fan� dry-type air cleaner with primary and
secondary elements and a restrictionindicator
� 12-volt direct-electric, gear reductionstarter with terminal shielding
� 55-amp alternator standard withROPS canopy; 90-amp alternatorstandard with optional cab
� 12-volt, 900 cca, group 31,maintenance free battery withdisconnect switch
� in-cylinder glow plugs with built-intemperature switch
� vertically mounted, spin-on oil andfuel filters
Hystat TransmissionDual-path, hydrostatic drive providesinfinitely variable speeds up to 9.0 km/h(5.6 mph), forward or reverse.
Features� each track is driven by a separate
variable-displacement piston pumpand motor combination
� drive pumps: two variable-displacement, slipper-axial pistonpumps mounted tandem-style toengine flywheel housing
� track motors: two 2-speed, link-typepiston motors mounted inboard ofmain frame at the final drives
� full flow filtering of hydrostaticcharge system oil
� relief valve settings: 42 000 kPa/420bar/6100 psi
� charging pumps: two gear-type, oneper drive circuit
Engine Performance Curve
800
50
100
150
200
250
300
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204
272
340
408
1000 1200 1400 1600 1800 2000 2200 2400 2600
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Torq
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Engine Rpm GrossNet
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80
60
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20
01 3 5 7 9 km/h
0 1.2 2.5 3.7 5.0 6.2 mph
20.3
15.8
11.3
6.8
2.3
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15939C Hystat Track-Type Loader specifications
Implement HydraulicsOpen-centered, parallel system. System is completely sealed.
Implement system, gear-type pumpOutput at rated engine RPMand 6895 kPa (1000 psi) 133 liters/min 35 gpmRelief valve setting (main) 19 820 kPa 2875 psiCylinders,
Lift, double acting:bore and stroke 114 x 607 mm 4.5 in x 23.9 inTilt, double acting:bore and stroke 102 x 622 mm 4.0 in x 24.5 in
Hydraulic cycle timeRaise 5.6 secondsDump 2.4 secondsLower, empty, float down 2.9 secondsTotal 10.9 seconds
Bucket controlsLift circuit (raise, hold, lower, float) automatic kickout in raise can be activated on/offby switch.Tilt circuit (tilt-back, hold, dump, regen dump) automatic bucket positioner-adjustableto desired digging angle.
Features� large-capacity single section gear pump� lines are steel tubing and high pressure XT-3™ hose
with o-ring face seals at connections� system sealed to keep out wear-causing dirt� protected by two 7 micron filters which help prevent
foreign material from entering reservoir� standard two-valve hydraulics for lift and tilt� optional three-valve hydraulics for lift, tilt and
MP bucket� optional four-valve hydraulics for lift, tilt, MP bucket
and rear implement� spring-centered, double acting valves with precision
metering� needle bearing yokes on all major pivot points� single lever control for lift and tilt� automatic bucket positioner and lift kick out� multi-function capability for fast truck loading and
material spreading applications
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Service Refill Capacities
Hystat System CapacitiesLiters Gallons
Fuel tank 157 41.4
Crankcase and filter 13 3.4
Final drives each side 14.7 3.9
Cooling system 21 5.5
Hydraulic tank 56.8 15
939C Hystat Track-Type Loader specifications
Final Drives
Hystat System Features� double-reduction, with outboard
planetary gear set� mounted independently of track
frames to isolate them from machineweight and ground-induced shockloads
� externally mounted for easymaintenance and service
Steering and Braking
Hystat System Steering Features� single lever steering and direction
control� moving control lever left or right
slows that track, causing machine toturn smoothly in that direction withfull power to both tracks
� full lever movement left or rightcauses that track to stop
� hydrostatic steering eliminatessteering clutches and brakes,eliminates adjustments too
Hystat Service Brake Features� hydrostatic (dynamic) braking
through machine drive system usingtransmission control lever or centerbrake pedal
Hystat Parking Brake Features� wet, multi-disc brakes located
between each hydraulic track motorand final drive
� spring applied, hydraulically releasedby oil pressure from hydrostaticcharge circuit
� automatically applied when the enginestops, or in the event of transmissionhydraulic oil pressure loss
� operator applied when the centerpedal is fully depressed, or whenthe parking brake lever is in the“park” position
� Hystat control system meetsSAE J1026-APR90
Weights(Approximate)
kg lbGP 9,484 20,908
MP 10,030 22,113
* Operating weight with OROPS,406.4 mm (16 in) track, bucket,recommended counterweight,operator, no teeth/segments, fullyfueled.
17939C Hystat Track-Type Loader specifications
UndercarriageRebuildable, deep hardened steel components.
Features� Sealed and Lubricated Track� hydraulic track adjusters� box section track roller frames� bolt-on rear track guiding guards� full length recoil guarding with
sprocket guards and wipers
� serrated, two-piece split master link� double-grouser shoes� segmented sprocket� sealed and lubricated rollers
and idlers
CanopyRollover Protective Structure (ROPS).ROPS canopy is required in U.S.A.
Features� vinyl suspension seat� sound suppression headliner� 76.2 mm (3 in) seat belt� wide angle rearview mirror� meets ROPS criteria SAE J1040-
MAY94 and ISO 3471-1994� meets Falling Object Protective
Structure (FOPS) criteria SAE J395a,SAE J231-JAN81, and ISO 3449-1992
StandardShoe width 406 mm (16 in)
Length of track on ground 2145 mm (84.4 in)
Track gauge 1549 mm (61 in)
Ground contact area 17,415 cm2 (2700 in2)
Ground pressure * 53.67 kPa (7.79 psi)
Number of rollers (each side) 6
Number of shoes (each side) 37
CabCaterpillar cab and Rollover ProtectiveStructure (ROPS).
Features� modular design� tinted windows� sliding right and rear windows� electric wiper/washer controls� nine adjustable ventilation ducts with
three-speed fan� front and rear wipers and washers� sunvisor� dome light� speakers, antenna, wiring and radio
bracket� cigarette lighter and ashtray� cloth suspension seat and headrest� 76.2 mm (3 in) seat belt� coat hook� key lock� insulated rubber floormat� meets Falling Object Protective
Structure (FOPS) criteria SAE J395a,SAE J231-JAN81, and ISO 3449-1992
* Equipped with general purpose bucket
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Loader Dimensions Approximate dimensions are applicable to all 939C Hystat Track-Type Loaders.
Dimensions (equipped with GP bucket) Standard1 Overall machine width with bucket 2160 mm 85 in2 Overall machine width without bucket 1955 mm 77 in3 Machine height to top of cab 2766 mm 109 in4 Length to front of track 2978 mm 117 in5 Overall machine length 4359 mm 171.6 in6 Digging Depth 127 mm 5 in7 Maximum rollback at carry position 50.2˚8 Reach at full lift height 866 mm 34 in9 S.A.E. specified dump angle 45˚10 Maximum rollback, fully raised 64.9˚11 Dump clearance at full height and 45˚ discharge 2677 mm 105 in12 Height to bucket hinge pin 3346 mm 131.7 in13 Overall machine height, bucket fully raised 4384 mm 172.6 in
Ground clearance 368 mm 14.5 inGrouser height 37 mm 1.4 in
19939C Hystat Track-Type Loader specifications
Operation SpecificationsGP Bucket
BareMP Bucket
Bare
Rated Bucket capacityβ m3 1.15 1.15
(Nominal Heaped) yd3 1.5 1.5
Struck Capacityβ m3 0.95 0.95
yd3 1.25 1.25Bucket Width mm 2160 2160
in 85 85Dump Clearance at full mm 2667 2604
lift and 45 dischargeβ in 105 102.5Reach at full lift mm 866 877
and 45 dischargeβ in 34.1 34.5
Digging depthβ mm 127 165in 5.0 6.5
Overall machine length mm 4359 4359in 171.6 171.6
Overall machine height mm 4384 4384with bucket at full raise in 172.6 172.6Static tipping load * kg 6607 6396
lb 14,565 14,100Breakout force kN 89.9 92.0
lb 20,200 20,688Operating weight ** kg 9484 10 030
lb 20,908 22,113
β Specifications and ratings conform to all applicable standards recommendedby the Society of Automotive Engineers. SAE Standard J732 FEB80 andSAE Standard J742 OCT79 govern loader ratings.
* Measured at operating weight with ROPS canopy.** Includes coolant, lubricants, full fuel tank, ROPS cab, bucket, 75 kg/165 lb
operator and recommended counterweight.
Cab, ROPS +204 kg +450 lb +253 kg +558 lb
Bucket teeth (long)
& segments +179 kg +394 lb -226 kg -498 lb
Air Conditioner +77 kg +170 lb +84 kg +185 lb
457 mm (18 in) shoes +108 kg +238 lb +76 kg +168 lb
Ripper with 3 teeth (includes
removal of 294.8 kg (650 lb) rear counterweight) +13 kg +29 lb +48 kg +106 lb
Rear counterweight (per plate) +116 kg +255 lb +195 kg +430 lb
Machine stability can be affected by the addition ofother attachments. Add or subtract the followingto/from machine operating weight and static tippingload:
Change in OperatingWeight
Change In Static TippingLoad
20 939C Hystat Track-Type specifications
Standard EquipmentStandard and optional equipment may vary. Consult your Caterpillar dealer for specifications.
Air-to-oil transmission cooler Air cleaner, dry-type with restriction
indicatorAlternator, 55-ampArm rests, four-way adjustableAutomatic bucket positioner and lift
kick outBattery, 12-volt, maintenance free,
900 cca with disconnect switch Blower fanCat 3046, turbocharged 6 cylinder diesel
engine with 12-volt direct electric keystart/stop
Engine enclosures, with grip handleFuel/water separator Fuel priming pumpFoot rests, adjustableGauges, illuminated, dash mounted
showing engine coolant temperature,engine oil pressure, transmission oiltemperature, and fuel level
Indicator lights:Low alternator voltageTransmission/hydraulic oil filterrestrictionParking brakeRabbit speed selection
Glow plugsGuards, bottomGuards, recoil, full length with
sprocket guards and wipersHornHydraulic controls, two-valve,
single-lever bucket controlHydraulic implement pumpHydrostatic transmission, dual path,
closed loop Joystick control leverLifetime lubricated rollers and idlersMufflerParking brake – automaticPrecleaner
Pull hook, frontRetrieval hitch, rearSeat, vinyl, suspension with adjustable
backrest and 76.2 mm (3 in) seat beltSegmented sprocketsService hour meterTool box with hinged lidTrack:
Adjusters, hydraulicFront/rear guiding guardsRoller frames, six rollerSealed and Lubricated, two-piece
master linksTrack shoes:
Standard — Sealed and lubricateddouble grouser 37-section, 406 mm(16 in)
Vandalism protection
21939C Hystat Track-Type Loader specifications
Optional EquipmentOptional equipment may vary. Consult your Caterpillar dealer for specifics. Approximate changes in operating weights.
kg lb
Air conditioning, cab 66 146
Back up alarm (required in U.S.A.) * *
Batteries, 12-volt, heavy duty, 30 65maintenance free, two 900 cca with disconnect switch
Buckets:General Purpose: 1.2 m3 (1.5 yd3) * *Multi-purpose: 1.2 m3 (1.5 yd3) * *
Bucket cutting edge, bolt-on:
3-piece for GP and MP buckets 143 315
7-piece for use with bucket teeth 73 161
Bucket teeth, short, bolt-on:
Set of 8 for GP and MP buckets 97 213
Bucket teeth, long, bolt-on:
Set of 8 for GP and MP buckets 100 221
Cab, ROPS and mounting, includes 204 45090-amp alternator, air pressurizer, air filter, heater, front and rear windshield wipers and washers, rearview mirror, sunvisor, speakers and antenna, ashtray, cigarette lighter, coat hook and key lock
Canopy, ROPS and mounting, includes * *rearview mirror and headliner (required in U.S.A.)
kg lb
Ether start aid 4 9
Guards:
Bottom, heavy duty 58 128
Rock, idler 45 110
Roller, full length 67 148
Heater, open canopy 36 80
Hydraulic arrangement:
3-valve, 1-lever bucket control 16 36MP bucket
3-valve, 1-lever bucket control, ripper 10 21
4-valve, 1-lever bucket control 25 56MP bucket, ripper
Lights, ROPS mounted, two front, 15 32one rear
Pre-cleaner with pre-screener 1 2
Ripper, includes three teeth 249 549and hydraulic cylinder
Ripper teeth, additional 12 26
Screens:
Rear, for use w/ROPS canopy 30 66
Rear, for use w/ROPS cab 31 69w/o air conditioning
Rear, for use w/ROPS cab 24 53with air conditioning
Side 50 111
Seat, Caterpillar Contour Series 28 62with adjustable backrest and 76.2 mm (3 in)retractable seat belt
Sweeps, logging 78 172
Tracks: double grouser:
Sealed and Lubricated, 37-section,457 mm (18 in) shoes 108 238
* Included in operating weight.
Available Rear CounterweightsTo provide optimum performance for eachmachine configuration, nine counterweightoptions are available ranging from 99 kg(217 lb) to 849 kg (1870 lb).
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Complete VersatilityFrom the beginning of a job to the finish grading, the 939C Hystat Track-Type Loader is a versatile tool.
One machine for all jobs!
Some of the first steps on any job can be accomplished easily with the help ofthe 939C, beginning with clearing the job site by loading and carrying debris,as shown above. Excavating and carrying/spreading material, above right,are also crucial elements to any job. The 939C is the perfect tool to perform them.Rounding out the job, below right, the 939C greatly facilitates trash cleanup,loading, and finish grading work.
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939C Hystat Track-Type Loaders
AEHQ3870-04 (8/04)(Replaces AEHQ3870-03)
For more complete information on Cat products, dealer services,and industry solutions, visit us on the web at www.cat.com
© 2004 CaterpillarAll Rights Reserved
Printed in U.S.A.
Materials and specifications are subject to change without notice.Featured machines in photos may include additional equipment.
See your Caterpillar dealer for available options.
R
Your Cat DealerThere is one very important component included with everyCaterpillar 939C Hystat Track-Type Loader that no one elsecan offer: your Cat dealer.
Whether you have questions about performance, service orfinancing, your Cat dealer has the answers. He is dedicatedto helping you make the right equipment choice for yourrequirements.
Plus, your Cat dealer has most parts you will ever need foryour Cat equipment right on the shelf. If not, the dealer’sworldwide computerized network will immediately find theclosest location of the part you need, minimizing yourdowntime.
When you need more details about the 939C, contact yourCat dealer. You’ll find he’s easy to talk to. And he’sgenuinely interested in talking with you.