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Dealer Service 27
MAN0845 (1/12/2011)
16. Check that the gear backlash is between 0.006”
and 0.016”. You should not have to adjust the
backlash.
17. Press in input oil seal (19), using tube of correct
diameter. Be careful not to damage seal lip.
18. Press oil cap (20) on to cover the rear of housing,
using a tube of the correct diameter.
19. Check gearbox housing for leaks by plugging all
holes except one. Apply 4 psi compressed air and
immerse the gearbox in water to verify that there
are no leaks.
20. Remove gearbox from water and dry off with
compressed air. Add SAE 80W or 90W EP oil until
it runs out of side level hole. Tighten all plugs.
Gearbox Installation
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.
Torque castle nut to 170 lbs-ft.
3. Attach gearbox stand to mower using four flanged
1/2" cap screws.
Drive Sheave Installation
Refer to Figure 21.
1. When gear stand is installed on mower, the
distance from the top of the mower deck to the
center line of the lower groove on the drive pulley
must be 2-21/32" (±1/32"). This is a critical
dimension and must be carefully adjusted for
proper belt life.
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 21. Drive Sheave Installation
UNIVERSAL JOINT REPAIR
Figure 22. U-Joint Exploded View
U-Joint Disassembly
1. Remove external snap rings from yokes in four
locations as shown in Figure 23.
.
Figure 23
Figure 24
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 24.
1. Yoke
2. Cup and bearings
3. Snap ring
4. Journal cross