GB-20
CLUTCH ADJUSTMENT
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.
BATTERY (988320)
Unit comes equipped with a maintenance-free battery that
requires no regular maintenance except cleaning the
terminals.
Check Battery
Terminals
Inspect battery and terminals every 25 hours.
To clean terminals:
1. Remove battery cover.
2. Remove battery cables from terminals.
3. Clean or service battery away from unit. Remove
corrosion from battery terminals and cable connections
with wire brush, then wash with a weak baking soda
solution.
4. Apply a thin coat of dielectric grease or petroleum jelly
to terminals and cable ends to retard corrosion.
5. Replace battery and secure with battery cover.
Figure 15
OG0795
1. Mower Clutch
Sheave
2. Mower Belt
3. Pump Belt Idler
Spring
4. Hydro Pump Belt
5. Pump Pulleys
1
2
3
4
5
WARNING: AVOID INJURY. Read and
understand the entire Safety section before
proceeding.
WARNING: Battery posts, terminals and related
accessories contain lead and lead compounds,
chemicals known to the State of California to
cause cancer and reproductive harm. Wash
hands after handling.
1
2
3
4
1. Armature
2. Rotor
3. Inspection Slot
4. Gap Adjustment
Nut
4
Figure 16
OG1500
