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28 Dealer Service
MAN0765 (12/5/2008)
Install Gearbox
NOTE: Gearbox is heavy: do not attempt to move with-
out mechanical assistance.
1. Set gearbox on gearbox stand and fasten with
bolts and nuts. Torque bolts to 175 lbs-ft.
2. Attach drive sheave to output shaft. Secure using
castle nut and hardware previously removed.
3. Attach gearbox stand to mower using four hex
screws.
Install Drive Sheave
1. When gear stand is installed on mower, dimension
A (from the top of the mower deck to the center line
of the drive pulley) must be 2-1/16" (±1/32"). This is
a critical dimension and must be carefully adjusted
for proper belt life. Add or subtract shim washers
under idler pulley to align with drive pulley.
2. Tighten gear stand hardware.
3. Fill gearbox half full with SAE 90W gear lube.
4. Check level after waiting five minutes to permit
lube to work through bearings. Add lube, if
necessary, until gearbox is half full.
5. Replace driveline shield. Attach driveline to
gearbox.
Figure 12. Drive Sheave Installation
UNIVERSAL JOINT REPAIR
Figure 13. U-Joint Exploded View
U-Joint Disassembly
1. Remove external snap rings from yokes in four
locations as shown in Figure 14.
Figure 14
2. With snap rings removed, support drive in vise,
hold yoke in hand and tap on yoke to drive cup up
out of yoke. See Figure 15.
Figure 15
1. Shim
2. Idler arm
3. Idler pulley
4. Drive sheave
5. Castle nut & cotter pin
6. Gearbox stand
1. Yoke
2. Cup and bearings
3. Snap ring
4. Journal cross