Snapper 7800971-01 Manual Del Operario página 17

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Driven and Drive Disc 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.
If the mower does not propel itself properly, check for the
following problems:
1. Grease on the drive disc (A, Figure 24) causing slippage.
2. Broken or disconnected drive spring (B).
3. Driven disc (C) is out of adjustment.
4. Driven disc rubber is worn - does not contact drive disc
properly.
5. Worn Poly-V belt (D) or engine drive belt (E).
If any of the above (1 thru 5) are causing problems, service
as follows:
Cleaning Drive Disc and Driven Disc
If oil or grease on the drive disc or driven disc is causing
slippage, clean the discs as follows:
1. Wipe away any oil or grease with a clean cloth.
2. Use either an approved grease solvent or hot, soapy
water to clean drive disc or driven disc.
3. Rinse components with clean water.
4. Dry components with a clean cloth.
Drive Spring Repair / Replacement
If the drive spring (A, Figure 25) is loose, reconnect. If the
spring is broken, replace with a new spring.
Note: Use a pair of needle nose pliers to install the drive
spring.
If the drive system continues slipping, see Troubleshooting
.
Driven Disc Adjustment
If the drive disc and driven disc are clean and the mower
drive is still slipping, adjust the driven disc as follows:
1. Move the ground speed control (A, Figure 26) into the
FAST position.
2. Remove the driven disc spring (A, Figure 27) from the
driven disc assembly (B). Also remove the pin and
washer (C) from the transfer rod (D), and remove the
end of the transfer rod from the hole in the driven disc
assembly.
3. Slide the driven disc assembly over to 1/8" (3.2 mm) (A,
Figure 28) from the outside edge of the drive disc (B).
4. Loosen the jam nut (A, Figure 29) securing the transfer
rod (B) to the ball joint (C) on the pivot bracket (D).
5. Turn the rod in or out of the ball joint until the end of the
rod aligns with the hole (E) in the driven disc assembly
from which the rod was removed.
Note: Do not move the pivot bracket.
6. Reinstall the rod as removed in Step 2. Move the ground
speed control to the SLOW position, then back to the
FAST position. Recheck the 1/8" (3.2 mm) measurement
described previously. Readjust as needed. Tighten the
nut when finished.
7. Reinstall the driven disc spring to the driven disc
assembly.
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2691517-00

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