Belt Replacement; Tire Pressure - Sears Craftsman 450 Serie Manual De Uso

Lubrication
After every 10 operating hours, oil or grease the lubrication points. Use clean
lubricating oil (#30 weight motor oil is suitable) and clean general purpose grease
(grease containing a metal lubricant is preferred, if available). See Figure 26.
Wheel Shaft
• Remove the wheels, clean the wheel shaft and apply a thin coating of grease.
• Grease the back, front and sides of the depth regulator lever.
• Remove the tines and clean the tine shaft. Use a file or sandpaper to gently
remove any rust, burrs or rough spots (especially around the holes in the
shaft). Apply grease to the ends of the shaft before installing the tines.
• Oil the threads on the handlebar adjustment lock and the handlebar
attaching screws.
• Oil the pivot point on the clutch handle and the clutch cable.

Tire Pressure

Check the air pressure in both tires. The air pressure should be between 15-20 PSI.
Keep both tires equally inflated to help prevent machine from pulling to one side.
Hardware
Before performing any type of maintenance on the machine, wait for all
parts to stop moving and disconnect the spark plug wire. Failure to follow
this instruction could result in personal injury or property damage.
Check for loose or missing hardware after every 10 operating hours and tighten
or replace — as needed — before reusing the tiller. Be sure to check the screws
underneath the tiller hood that secure the transmission cover and the Depth
Regulator Lever to the transmission.
SERVICE AND MAINTENANCE
Handlebar
Hardware
Depth Regulator Lever
Tine Shaft
Figure 26
WARNING

Belt Replacement

Your tiller has been engineered with a belt designed for long life and optimal
performance. Use only a factory authorized belt as an "over- the-counter" belt may
not perform satisfactorily. The procedure requires average mechanical ability and
commonly available tools.
To replace the Drive belt, follow these steps:
1. Remove the belt cover from the left side of the tiller by removing the two
hex washer screws from the top of the belt cover. See Figure 27.
Hex Washer
Screw
2. Remove the cap nut and flat washer from the front side of the belt cover.
Remove the hex washer screw at the back of the cover. See Figure 27.
3. Remove the belt keeper assembly located behind the engine pulley by
removing the two hex bolts and lock washers. SeeFigure 28.
Belt Keeper
Engine Pulley
4. Remove the idler pulley by removing the bolt and nut. See Figure 28.
5. Remove the old belt and install the new belt. Follow the instructions in
reverse order to re-install the belt keeper and belt cover. See Figure 28.
NOTE: Upon reassembly, make certain the belt is routed over the idler pulley
and inside of the belt keepers by the engine pulley.
19
Hex Washer Screw
Cap Nut &
Flat Washer
Figure 27
Belt
Idler Pulley
Figure 28