Briggs & Stratton SNAPPER 7800979-00 Manuel D'utilisation page 25

3. Remove the holder (A), O-ring (C) and bearing (D).
4. Install the new bearing.
5. Carefully install the new O-ring over the outside of the
new bearing.
6. Install the bearing holder, and secure with screws.
7. Install the 3/8" hex lock nut.
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Belt Service
WARNING
Amputation Hazard
• DO NOT attempt any maintenance, adjustments or
service with engine and blade running.
• STOP engine and blade.
• Disconnect spark plug wire and secure away from spark
plug.
Burn Hazard
• Engine and components are HOT.
• Avoid serious burns, allow sufficient time for all
components to cool.
On self-propelled mowers, the engine belt (A, Figure 37)
transmits power from the engine pulley (B) to the drive disc
(C). The drive disc powers the poly-v belt, which engages the
transmission that powers the rear wheels. Should these belts
become worn, they could cause slippage, which would impair
mower performance. The condition of the engine belt and
poly-v belt should be checked after every 25 hours of mower
operation.
Engine Drive Belt Replacement (Stretch Type Belts)
1. Empty the fuel tank.
2. Note the belt routing (Figure 37). There is no idler pulley
on these models to disconnect.
NOTICE
Drain the fuel tank before tipping the mower. DO NOT tip
the machine with the carburetor or spark plug down. Oil
from the crankcase will saturate the air filter and cause the
engine to be hard to start or not start at all. If contamination
does occur, the air filter will have to be replaced.
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3. Remove the driven disc. See Driven Disc Replacement
for driven disc removal procedure.
4. Drain the fuel tank before tipping the mower. Do not tilt
the mower with the spark plug or carburetor down. Tilt
the mower up on its rear wheels and remove the blade
and blade hub. Assistance from another person may be
necessary to hold the mower in the tilted position.
5. Hold the slotted end of the drive disc bolt (B, Figure 38)
with a screwdriver and remove the nut (F) and internal
tooth lock washer (E).
6. Remove the belt cover, located under the deck.
7. Lift the drive disc (A) up and remove the worn belt.
8. Loop one end of the new belt over the engine pulley and
insert the other end through the slot in the deck.
9. Loop the belt around the pulley on the bottom of the drive
disc.
10. Reinstall the drive disc and retaining hardware.
Note: 1) The square shoulder of the drive disc bolt must fit
into the square hole of the bushing (C). 2) The square end of
the bushing must fit into the bracket slot (D).
11. Reinstall the belt cover and tighten the bolts securely.
12. Reinstall the blade hub and cutter blade. Recommended
torque for the blade cap screw is 40 lb-ft (54 Nm).
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