installation and maintenance manual · 2021. 3. 16. · underslung suspension underslung spring...

INSTALLATION

AND MAINTENANCE

MANUAL

E6100 SERIES

SPRING SUSPENSION

Eveley International Corp.

A Customer Focused Company

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E6100 Series Spring Suspension

The E6100 series suspension system is a three point system available in undermount or underslung set-ups.

Single piece equalizers combined with axle seats of various heights lets you custom build your system to match

your mounting height requirements. Axle spreads from 44” [1118mm] to 72” [1829mm] are available. All

components are formed and fabricated from high quality steel and robotically welded for guaranteed precision

and quality.

Standard features include the Eveley "Long-Life" metalastic bushings at all pivot connections and large hanger

footprint bases. This light-weight heavy duty suspension system is an excellent choice for continuously loaded

equipment and offers high stability, low cost, long life and easy installation. An O.E.M. standard for all

applications, available as single, tandem, tri-axle or multi-axle units.

Superior Performance for the Industry

Safety and durability go a long way with this Industry Standard design to give you the kind of superior

performance that you've come to expect.

Progressive Manufacturing Procedures

Using today's "state of the art" manufacturing technologies in Robotics, Micro-electronics and

Computers (CAD/CAM), an Eveley suspension has the quality and accuracy from start to finish.

The direction here at Eveley is towards better design and manufacturing methods to ensure increased

product life, safety and performance.

Variable Axle Spacing

Axle spacing of 44” [1118], 49" [1245mm], 54" [1372mm], 60" [1524mm] and 72"[1829mm] are

available in single, tandem, or multi-axle configurations.

Available in undermount and underslung configurations.

Axle seat heights of 1” [25mm], 2" [51mm], 3" [76mm] allow a more customized ride height using the

same springs.

Components that "Go the Distance"

High Strength steel used in all hangers and axle connections contribute to the unmatched durability.

All pivot points feature high-tech "Long-Life" bushings.

All U-bolts are Grade 8 material, and are reverse mounted and roll threaded to allow easy torquing to

700 ft lbs [949J].



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UNDERMOUNT SUSPENSION

Undermount spring suspensions (axle below spring configuration) use 7/8” U-bolts to connect the axle to the

suspension for a positive fit. All U-bolts are grade eight material with rolled threads. With the use of the right

U-bolt on your underslung suspension, you will experience less maintenance and a safer axle connection.

STANDARD AXLE SPACINGS AVAILABLE

44” (1118mm) 49” (1245mm) 54” (1372mm) 60” (524mm) 72” (1829mm)

UNDERSLUNG SUSPENSION

Underslung spring suspension (axle on top of spring configuration) use 1” forged top U-bolts to connect the

axle to the suspension for a positive fit. All U-bolts are grade eight material with rolled threads. With the use of

the right U-bolt on your underslung suspension, you will experience less maintenance and a safer axle

connection.

STANDARD AXLE SPACINGS AVAILABLE

49” (1245mm) 54” (1372mm) 60” (524mm) 72” (1829mm)



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24 3/4" [629mm]24 3/4" [629mm]8 3/4" [222mm]

18" [457mm]49 1/2" [1257mm]

44" [1118mm] 42 3/4" [1086mm]

19 1/4" [489mm]

4 3/8" [111mm]

3.38[86mm]

94.5"[2400mm]

E612A49UM UNDERMOUNT



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E6100 SERIES ORDERING INFORMATION

In order to avoid confusion, our suspension kit numbering system is simple and easy to use. It contains all

necessary information to identify all aspects of the kit requirements.

Example:

Therefore:

A model designated as E613A60UM 15-1/2 TRA1150, is described as a Triaxle suspension from our 6100

Series of suspensions, that spaces the axles at 60"[1524mm] apart and mounts under the main frame rails (UM-

undermount) at a ride height of 15 1/2” [394mm], using TRA1150 springs. To determine the capacity and ride

height you wish your trailer to operate at, we suggest that you refer to the spring selection charts on page 90.

Please note that all of our models of suspensions can use any of the three (3) axle seats, 1"[25mm] to 3" [76mm]

high, that we manufacture, thereby ensuring that a full range of ride heights that are common to the industry as

well as many special ride heights may be achieved using the same spring.

IMPORTANT!!!

We do not recommend the use of High Arch springs with our E4400 Series tandem and tri-axle models. If

added mounting height is required, we suggest the use of one of three axle seats plus the use of our extended

hangers.

Before specifying the springs to be used, we suggest that you consult the spring selection chart on page 5 of this

publication. This gives you the mounting heights available with each type of spring.



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SPRING AND RIDE HEIGHT CHART

SYMETRICAL SPRINGS



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E612A49US UNDERSLUNG



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UNDERSLUNG SPRING AND RIDE HEIGHT CHART

INSTALLATION PROCEDURES

E6100 INSTALLATION INSTRUCTIONS

Major components of the suspensions are factory assembled by Eveley to help reduce your assembly time and

also to ensure the correct fitting of all parts.

FRAME ASSEMBLY

1. Take your measurements from the center of the King Pin position to the rear hanger and tack weld to the

trailer frame.

2. Position the remaining hangers using the dimensions shown in the assembly drawings.

3. When all hangers are tacked to the frame, check for correct measurements and squareness to the frame.

4. For final welding instructions refer to Welding Specifications.

AXLE ASSEMBLY

1. Position axle so that the brake cam rotation is the same as wheel rotation. Place axle seats on axle so

they are horizontal to the axle and parallel to each other. Center to center width measurements of axle

seats and hangers must be identical.

2. Tack weld into position, check for squareness and weld as per Welding Specifications. See Axle seat

figure 3 -Page 17



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SUB ASSEMBLY

1. Next attach adjustable torque rods to curbside and rigid torque rods to roadside. Insert torque rod bolts

so that washers and lock nuts are to the outside. At this stage do not tighten nuts.

2. Install springs, top plates and U-bolts. Line up springs so that distances between the diagonals and the

ends are the same. Tighten U-bolt nuts to 700 Ft.lb [949.1 N/m] of torque and torque rod clamp bolts to

90 Ft.lb. [122.0 N/m] of torque.

FINAL ASSEMBLY

1. Fit two sub-assemblies together, making sure the lipped end of each spring is located in the equalizer.

(With the exception of wide spread where the rear spring assembly can be reversed if required.)

2. Insert spring rebound bolts in equalizer so that 1/2" nuts are to the outside of the trailer. These bolts

should only be tightened enough to keep the bolt snug, but loose enough for the bolt to roll if engaged

by the spring lip. On the E44 application, no bolt is fitted into the rear equalizer assembly. However, a

spring rebound rod should be welded into the position where the bolt would normally be fitted.

3. Connect torque rods to front and center hangers. Tighten all torque rod bolts to 320 Ft.lb. [433.9 N/m].



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ALIGNMENT AND ADJUSTMENT

1. Make sure the suspension is not binding at any point and that the trailer is resting level.

2. Commence suspension alignment by measuring from center of King Pin to the end centers of the front

axle, when completed, measure from front axle centers to second axle centers and so on, depending on

the axle configuration. Make sure suspension is in its neutral position.

3. Tighten torque rod clamp nuts to 90 Ft.lb. [122.0 N/m] of torque.

4. Align rear axle to front axle by measuring from the axle centers on each side and shorten or lengthen the

adjustable torque arm screw on the rear axle until the measurements are the same.

5. IMPORTANT - Do not lubricate any parts of the suspension or apply grease to the ends of the springs.

TRI-AXLE SPREADS

Because of the extended length of these suspensions, the relationship between the fifth wheel coupler height and

the mounting height of the suspension is very important. When units are designed around a wide-spread triaxle

suspension, the designer, should ensure that when coupled to the tractor, the trailer suspension rides in the

neutral position. If the unit rides in a semi-equalized state, overloading of the axles will result. This can be

corrected by the addition of a riser block to the appropriate axles. This problem could also be experienced on

Wide-Spread tandem suspensions with a spread of more than 72" [1829mm] between axle centers. This can be

corrected by the addition of a riser block to the first axle. In some cases, two different spring seat heights can be

supplied to counteract this situation.

Any questions or problems regarding the performance of these suspensions should be directed to this company.



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AXLE SEAT

Remember to maintain a tight fit between the axle seat and the axle tube prior to welding.

SUSPENSION INSPECTION

It is recommended, that after the first 1,000 miles (1,609 km), operators should check all nuts for tightness and

re-torque. Re-torquing is essential to the guarantee and ensures proper operation. All torquing should be

periodically checked; at 10,000 miles [16,090 km], 30,000 miles [48,270 km], 50,000 miles [80450 km] etc.

THIS INSPECTION IS ESSENTIAL

Failure to maintain the specified torque on all nuts and bolts could result in excessive hanger wear, bolt wear,

bushing failure, broken springs, tire wear, and the stripping of bolt threads. A periodic check by the operator

will eliminate these problems.



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WELDING SPECIFICATIONS Any approved welding rod such as 7018 or the equivalent, can be used. A minimum 5/16” (8mm) fillet weld

should be used for attachment of hangers to the frame and braces to the hangers

Figure 1: Hangers on I-beam sub-frame (standard). Centers of I-beam and hangers are the same.

Figure 2: Hangers on I-beam sub-frame (standard). Centers of I-beam and hangers are offset to each other

Reinforcing and bracing are req’d



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On standard suspension designs for trailers and semi-trailers, all axle and brake moments as well as the

biggest portion of the torsional stabilizing forces and a portion of the spring weight vertical forces pass

through the front mounting brackets into the vehicle frame. Therefore, the trailer frame must be strengthend

as well as the hangers braced. A vertical reinforcement must be placed between the upper and lower flanges

and welded to the web of the trailer frame. An angled brace should be placed between the suspension hanger

face and a cross member. As shown below. Placing a brace between left and right hanger faces is not

recommended



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AXLE SEAT

Brackets which wrap around the axle should touch the axle as shown in view “A” in figure 3. With this type of

fit, loads on the bracket are transferred directly to the axle. If a gap exists between the axle and the bracket as

shown in view “B” in Fig.3, these loads are transferred to the weld. This may overstress and crack the weld.

The weld arc should not be started at the end of the bead. Instead, the electrode should be started away from the

end of the bead and moved as shown in figure 5. Any craters which remain should be filled during this

movement. In both cases, the intention of this guidance is to insure that the stress risers which occur when either

start or stopping a weld are located away from the ends of the weld.

When welding axle seat in position mig welding is preferred. Welding wire should be 7018 or equivalent and

should be performed so that welding is done in a flat position. If this is not possible welding should be

performed using the stick method

Figure 4: Axle seat on 5” [127mm] diameter

axle.

These restrictions apply to tack welds also.



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BUMP OUT BLOCKS

It is the practice of some manufacturers to install “bump out blocks” or “dumping blocks” above the rear axle or

axles of a spring suspension. This is supposed to help the stability of the unit during a dumping operation. In

most cases the “bump out blocks” are installed incorrectly, and actually restricts the movement of the

suspension and spring under normal operation. This situation causes accelerated wear of the spring and spring

hangers, and ultimately creates an early failure of these parts.

If the correct spring assembly is chosen for this combination, together with the recommended suspension

assembly, the “bump out blocks” are not required. The stability of the suspension assembly will withstand the

dumping operation. Before installing a suspension for this type of application, the manufacturer should check

with the suspension supplier (Eveley International Corp.) to ensure that the correct suspension and spring

combination has been chosen.

Eveley International will not guarantee the performance of its suspensions, or the serviceability of the parts of

the suspension, if “bump out blocks” are installed as part of the suspension assembly. All statements and

compliance with our standard warranty policies will be NULL AND VOID under such conditions.

This statement applies to all Eveley International spring suspensions assemblies with the following series

numbers. E6400 E6000 E4400 E6100 E6200

This includes undermount, underslung, straddle mount, and flange mount models



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EQUALIZATION OF SPREAD AXLE CONFIGURATION

When using multi-axle suspensions with extended axle spacing’s, the relationship between the fifth wheel

coupler height and the mounting height of the suspension is very important.

When designing around spread axle suspensions, the manufacturer should ensure that when coupled to the

prime mover, and in a loaded condition, the suspension rides in a neutral position. If the suspension rides in a

semi-equalized condition it could produce:

a.) Overloading of axles.

b.) Increased tire and brake wear.

c.) Spring breakage.

d.) Suspension damage.

If the suspension is running in the semi-equalized condition, or if the trailer is designed to have a natural draft to

the rear, i.e. Tankers, a Container Chassis, the suspension can be ordered with different axle seat heights for

each axle. This will allow the suspension to run in the neutral condition even if the trailer slopes or drafts to the

rear. On existing suspensions, this same condition can be attained with the use of riser blocks. The designer

should make every attempt to taper the frame and leave the suspension with identical axle seats. Eveley

International cannot be held responsible for a suspension not equalizing properly if different axle seats or riser

blocks are used.

This same condition can also apply to Air-Ride suspensions as well as spring suspensions. For example, on a

48ft [14.63m] trailer with a tri-axle spread suspension on the rear, if the trailer is built for a 49-1/2" [1257mm]

coupler height, but is actually running at 52" [1321mm] coupler height, the suspension will have used all of its

articulation travel, in the empty condition. In the loaded condition, it will be locked out under normal travel, and

will produce excess loadings on the spring ends and spring pads of the suspension. In the case of an Air-Ride

suspension, the air bags would be extended outside of their normal working range, which could lead to

differential axle loadings and increased component wear.

Also to be considered when setting the coupler height of the trailer, should be the compatibility of the truck and

trailer suspensions. If the truck suspension is Air-Ride and the trailer is spring, the trailer suspension will

automatically use some of its articulation when loaded; the truck however, would always be at its original

height.

If compatibility is required for various coupler heights, i.e. 50" [1270mm] - 52" [1321mm], then a “mean”

dimension should be chosen for the trailer coupler height, i.e., 51" [1295mm]. This will allow for equalization

on the trailer suspension, without constantly running with negative movement.

If you require assistance to calculate suspension heights, or more information on suspension equalization, please

contact our Customer Service Department.



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EVELEY INTERNATIONAL CORP. PRODUCT WARRANTY

This warranty shall be limited to the original purchaser from the date of sale and covers all new components

manufactured by Eveley International Corp. to be free of defects in material and workmanship, for one year (parts and

labour) and up to five years (parts only) when installed, assembled, and maintained in accordance with Eveley

International Corp. installation and maintenance procedures, under normal use and service.

The product installer is responsible for providing correct vehicle components and attachments, and providing

the clearance for suspension components, axles, wheels and tires. The installer is also responsible to ensure that

products supplied by Eveley International Corp. are operating within their engineering designed capabilities and

capacities.

The product owner is responsible for pre-operation inspection, periodic inspections, maintenance, and use of

the product as specified by Eveley International Corp.

This warranty is null and void if the products are subject to improper installation, modification, adjustment,

unauthorized repair, damage as a result of abuse, accident, and /or negligence, and incorrect or insufficient

maintenance or applications, including but not limited to, overloading product ratings or maximum vehicle weight

specifications. This warranty is null and void if parts failure or system problems occur as a result of incorrect trailer or

frame design. This is the responsibility of the trailer or equipment manufacturer.

The responsibility under this warranty is limited to the replacement or repair of defective parts at no charge and

is at the discretion of Eveley International Corp. Products to be considered for warranty are to be returned pre-paid to

Eveley International Corp .and will be subject to our inspection, or the field inspection by an authorized representative

of Eveley International Corp. before warranty is approved.

In no event shall Eveley International Corp. be liable for any expense, loss or damage (direct, Incidental,

consequential, or exemplary) including, but not limited to, towing expenses, equipment rental, downtime expenses,

cargo damage, incidental expenses, or any other losses arising in connection with the sale, use or inability to use the

product resulting from a warranty covered part found to be defective. Any allowance for labour costs associated with

the repair or replacement of the subject component must be pre-approved in writing by Eveley International Corp.

Component parts included in the Eveley International Corp. product but purchased from outside vendors are

guaranteed by Eveley International Corp. to the same extent as the guarantee offered by the outside vendor to Eveley

International Corp.

Any Warranty implied by law, including any warranty of merchantability or fitness for a particular purpose, is

limited to the expressed warranty terms provided in this warranty coverage.

All wearable items are not included in this warranty.

This warranty is limited to normal on highway use or written approval applications. This warranty does not

cover, off road, mining, or raw wood applications.

This warranty coverage is for Canada and the United States only.

The use of none-genuine Eveley International Corp. replacement parts will void this warranty coverage.

No other warranty is expressed or implied by Eveley International Corp.

installation and maintenance manual · 2021. 3. 16. · underslung suspension underslung spring...

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