JLG 500RTS ANSI Service Manual - Manual (Page 35)

SECTION 2 - PROCEDURES
3121103 – JLG Sizzor – 2-19
Assembly
NOTE: Use filtered system oil to lubricate all critical moving
parts before assembly.
1. Install one snap ring in rear groove of drive shaft.
Install one thrust washer, thrust bearing, and second
thrust washer on drive shaft. Install second snap ring
in front groove on drive shaft.
2. Replace needle bearing in housing if necessary.
Install shaft in housing assembly and install washer.
Oil I.D. of new shaft seal and press into position.
Retain with snap ring.
3. Compress pin keeper and install in spline area of
piston block.
4. Install three pins in special grooves of spline with
head end of pin toward inside of block.
5. Install one washer, spring, and second washer. Use
two 3/8 I.D. washers, 3/8 N.C. nut and 3/8 x 3-1/4
capscrew to compress spring and retain with snap
ring. Remove 3/8 N.C. nut, 3/8 x 3-1/4 capscrew and
two washers.
6. Install pivot, spider, and piston assemblies in piston
block assembly.
7. Lubricate thrust race and install in housing assem-
bly.
8. Install piston block assembly in housing assembly.
Piston shoes must contact thrust race. Be sure all
parts are in their proper position.
9. Install new needle bearing in backplate if necessary.
10. Install new o-ring on backplate.
11. Install backplate on housing.
12. Install six capscrews and torque to 15 - 18 ft lbs (20 -
24 Nm).
2.21 DRIVE TORQUE HUB - 2WD/4WD REAR
TORQUE HUB UNITS SHOULD ALWAYS BE ROLL AND LEAK
TESTED BEFORE DISASSEMBLY AND AFTER ASSEMBLY TO
MAKE SURE THAT THE UNITS GEARS AND SEALANTS ARE
WORKING PROPERLY.
WHEN REBUILDING A UNIT, USE NEW SEALS AND O-RINGS.
NEVER RE-USE SEALS AND O-RINGS, AS THIS WOULD CAUSE
UNIT TO LEAK.
WEAR SAFETY GLASSES WHEN PERFORMING THE FOLLOWING
STEP. BE AWARE THAT SPRING AND SPACERS COMPRESSED
BY RETAINING RING MAY POP SUDDENLY OFF SHAFT WHEN
RETAINING RING IS REMOVED.USING RETAINING RING PLIERS,
REMOVE RETAINING RING FROM GROOVE ON INPUT SHAFT.
1. Remove one spacer, one spring, and other spacer
from input shaft.
2. Remove thrust washer from around spindle.
3. Lift internal gear out of hub.
BEWARE OF SHARP EDGES IN COUNTERBORE WHEN REMOV-
ING O-RING.
4. Remove o-ring from counterbore in hub. Discard o-
ring.
5. If necessary, disassemble hub-spindle assembly as
follows:
NOTE: Start with large end of hub facing up, large end of
spindle facing down.