Specifications

MAINTENANCE
55
550 Gas/LPG 330650 (2--05)
BELTS AND CHAINS
VACUUM F AN DRIVE BELT (For machines
below serial number 007006)
The vacuum fan drive belt tension should be
checked after every 50 hours of operation. The
proper belt tension for gasoline and LPG
machines is obtained when the midpoint of the
belt deflects 0.34 in (9 mm) from a force of 7 to 8
lb (3.2 to 3.6 kg).
TO ADJUST VACUUM FAN DRIVE BELT
1. Stop the engine and set the machine
parking brake.
FOR SAFETY: Before Leaving Or
Servicing Machine; Stop On Level
Surface, Set Parking Brake, And Turn
Off Machine.
2. Raise the engine cover.
FOR SAFETY: When Servicing Machine,
Avoid Moving Parts. Do Not Wear Loose
Jackets, Shirts, Or Sleeves When
Working On Machine.
3. Loosen the jam nuts on the tension spring
eyebolt.
4. Thread the tension spring eyebolt in to
tighten the vacuum fan drive belt or out to
loosen the vacuum fan drive belt to get the
desired belt tension.
5. Tighten the tension spring eyebolt jam nuts.
6. Lower the engine cover.
A
B
C
D
E
06973
ADJUSTING VACUUM F AN BELT
A. Vacuum Fan Housing
B. Tension Spring
C. Tension Spring Eyebolt.
D. Jam Nut
E. Vacuum Fan Drive Belt
ALTERNATOR AND RADIATOR FAN BELT
The alternator and radiator fan belt tension should
be checked after every 100 hours of operation.
The proper belt tension is obtained when the
midpoint of the belt’s longest span deflects 0.50 in
(13 mm) from a force of 10 to 12 lb (5 to 6 kg).
TO ADJUST ALTERNATOR AND RADIATOR
FAN BELT
1. Stop the engine and set the machine
parking brake.
FOR SAFETY: Before Leaving Or
Servicing Machine; Stop On Level
Surface, Set Parking Brake, And Turn
Off Machine.
2. Open the left rear engine access door.
3. Loosen the alternator clamp bolt.
4. Push the alternator out to tighten the belt.
ATTENTION! Do not use a pry bar
against the alternator to tighten the belt.
Using a pry bar may damage the
alternator.
5. Tighten the alternator clamp bolt.
6. Check the belt deflection; adjust if
necessary.
7. Close the left rear engine access door .
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