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BOGIE SUSPENSION AND TRACK

D E F G(FRONT)

K L(REAR)

A-IDLER SPRING BRACKET F JAM NUT K-IDLER WHEEL SHAFTB-IDLER POST BRACKET G-IDLER ADJUSTING SCREW L IDLER SHACKLEC--IDLER POST H-ANCHOR PIN BOLT M-STOP SCREW BRACKETD IDLERSPRING I -IDLER STOP SCREWE--ADJUSTING NUT J--IDLER POST BRACE RA PD 319664

RA PD 319664

Figure 137 Idler Post Assembly Installed245

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TM -9-710118-119

BASIC HALF-TRACK VEHICLES WHITE, AUTOCAR, and DIAMONDb) Install Tracks. Raise vehicle until bogie rollers will clearground enough to install the track. Refer to paragraph 117 d.c) Release Volute Springs. Refer to paragraph 118 c 4) b).d) Install UpperRollerAssembly. Refer to paragraph 118 b 4).e) Adjust Tracks. Refer to paragraph 117 b 5).

119. IDLER AND ADJUSTING MECHANISM.a. Description. Steel idler wheels are mounted on each side of theframe near the rear of the vehicle (fig. 137). These idler wheels sup-port the rear end of the endless rubber track. Each idler wheel ismounted on an idler shaft that is carried in an idler shackle which is

Figure 138 Removng Track Adjusting Idler Bearing Nutmounted on an idler post secured to the frame and further supportedby an idler brace. This unit as now installed, provides a two-wayaction for the idler wheel by having it work against a double coil spring.This keeps the track under tension but will allow the idler wheel tomove forward to ease unusual strain on the track, or to move back-ward to take up any extra slack created momentarily. This relievesstrain on both the track and idler post.

b. Removal of Idler Wheel and Bearing.(1) REMOVE TRACK. Refer to paragraph 117 c.2) REMOVE HUB COVER. Remove six hub stud nuts. Tap caplightly to loosen it on studs and pull it off with its gasket.

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BOGIE SUSPENSION AND TRACK3) REMOVE IDLER WHEEL AND BEARINGS. Remove idler bearingnut and lock washer fig. 138), using a long-nosed chisel and screw-driver in the manner illustrated. Remove idler wheel and bearings,

using a wheel puller fig. 139) or similar equipment.c. Replacement of Bearing.1) REMOVAL. Drive out seal and bearings with a brass drift andhammer.2) INSTALLATION. Drive new bearings into the idler and if greaseseal has been damaged, replace with new seal. Install seal with thelips or open ends away from the bearings.

_ IWHEEL IDLERWHEEL INNERPULLER SH FT IDLER FL NGEFigure 139 Track Idler Inner Flange Removal

d. Installation of Idler Wheel and Bearings.1) INSTALL INNER IDLER WHEEL ASSEMBLY. Place idler wheelwith bearing spacer, bearings, and oil seals installed in idler wheel hubon idler shaft and secure to shaft with idler bearing nut and lock washer.Place hub cover and gasket in position on hub studs and secure withsix hub stud nuts.e. Removal of Idler and Track Tension Mechanism.1) REMOVE TRACK. Refer to paragraph 117 c.2) REMOVE INNER IDLER WHEEL ASSEMBLY Refer to paragraph119 b.3) REMOVE COIL SPRINGS AND TENSION SCREW. Release tensionon coil springs and tension screw. Remove coil springs and tension

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