John Deere ST1129 Snow Blower User Manual


 
MAINTENANCE
24
MTF-0410104L
BELT ADJUSTMENT
Traction Drive Belt
The traction drive belt has constant spring pressure and does
not require an adjustment. If the traction drive belt is slipping,
replace the belt. See “How To Replace The Belts” in the
Maintenance section.
Auger Drive Belt
If your snowthrower will not discharge snow, check the
control cable adjustment. If it is correct, then check the
condition of the auger drive belt. If it is damaged or loose,
replace it (see Belt Replacement in this section of the
manual).
1. Disconnect spark plug wire.
2. Remove screw from belt cover. Remove belt cover
(see Figure 27).
3. Loosen nut on auger idler pulley and move auger idler
pulley towards belt about 1/8 inch (3 mm) (see
Figure 31).
4. Tighten nut.
5. Have someone engage auger drive clutch. Check ten-
sion on belt (opposite idler pulley). Belt should deflect
about 1/2 inch (12.5 mm) with moderate pressure
Figure 28). You may have to move idler pulley more than
once to obtain the correct tension.
6. Reinstall belt cover.
7. Whenever belts are adjusted or replaced, the cables will
need to be adjusted. (See Cable Adjustment in this sec-
tion of the manual).
8. Attach the spark plug wire.
Figure 27
Belt Cover
Screw
Figure 28
Auger
Drive
Engine
Pulley
1/2 inch
(12.5mm)
Deflection
Impeller
Pulley
Idler
Pulley
Engaged