Service Manual

Repairs
Drive Coupling Removal and Installation (Fig. 9)
Removing Drive Couplings
1. Lower the cutting unit to the shop floor, turn the engine
of
f, remove the key from the ignition switch and engage
the parking brake.
2. Raise the seat and secure it in that position.
3. Jack up the back end of the machine and support it
wit
h jackstands to prevent it from falling accidentally.
4. Block the front and back of the traction unit’s drive
wh
eels to prevent the machine from rolling.
5. Remove the two cap screws, lock washers, flat wash-
ers and spacers securing the drive coupling assembly
to th
e engine hub. Remove the two cap screws, flat
washers and locknuts securing the coupler to the trans-
mission hub. Slide the assembly out after the cap
screws have been removed.
6. If the drive coupling assembly must be disassembled,
s
eparate the rubber couplings (Item 17) from the drive
coupling (Item 18) by removing the nuts, flatwashers
and cap screws.
Installing Drive Couplings
1. Assemble the rubber couplings and drive coupling
wit
h the cap screws, flat washers and nuts.
2. Position the drive coupling assembly between the
engine hub and transmission hub; align the holes. Se-
cure the drive coupling to the hubs with cap screws, lock
washers, flat washers, and nuts. Tighten the cap screws
alternately and evenly to prevent distortion of the rubber
couplings.
NOTE: After installing the drive coupling assembly, the
rub
ber coupling must not be deformed more than .125
in. (3 mm) in either direction. If the rubber coupling is
deformed, correct by loosening the transmission hub
hub setscrews and changing the position of the hub. The
end of the pump hub must be positioned 0.60 - .250 in.
(1.5 - 6 mm) away from the transmission face. Tighten
t
he setscrews on the hub(s) to a torque of 12 ft-lb
(1.7 Kgm)
3. Remove the wheel blocks and jackstands. Lower the
ma
chine to the shop floor.
4. Lower the seat and start the engine to test for proper
o
peration of the coupling components.
Figure 9
Groundsmaster
®
300 Series Page 9 - 7 Repairs