GB - 40
Installation
1. Install new traction drive belt (E). See
2. Connect tension spring (D) to idler pulley
bolt (C). Install nut (B) and tighten until
1-2 threads of bolt are visible. Do not
overtighten.
3. From above unit tighten flange nut (A) to
secure hex bolt, tensioning spring (D).
See Figures 43 and 44.
4. Install mower deck drive belt.
Removing and Installing Mower Deck
Drive Belt on page 35.
5. Install mower deck center belt guard.
CLUTCH ADJUSTMENT
See Figure 45.
If clutch fails to engage or disengage properly
or begins to make abnormal noise, check the
air gap adjustment at the three inspection
slots.
To check:
1. Stop engine, remove key and wait for all
hot parts to cool.
2. Measure the air gap between the
armature and the rotor.
Minimum: A .005" feeler gauge should
slide between armature and rotor with
slight contact.
Maximum: A .023" feeler gauge should
slide between armature and rotor with
slight contact.
3. Repeat for each inspection slot.
To adjust:
1. If necessary, loosen gap adjustment
nuts until a .005" feeler gauge fits
between armature and rotor.
2. Slide a .012" feeler gauge between
armature and rotor.
3. Tighten gap adjustment nut until there is
slight contact on feeler gauge.
4. Repeat steps 1 – 3 at each inspection
slot.
NOTE:
Adjust air gap as evenly as possible.
5. Start unit, engage and disengage PTO.
6. Shut off unit.
7. Recheck air gap and adjust if needed.
Figure 44
A
E
D
B, C
Figure 45
1. Armature
2. Rotor
3. Inspection Slot
4. Gap Adjustment Nut
