MTD 660 Operator's Manual page 22

Rear Wheels
The rear wheels should be removed from the axles
once a season. Lubricate the axles and the rims well
with an all-purpose grease before re-installing them.
Front Axles
Each end of the tractor's front pivot bar may be
equipped with a grease fitting. If so equipped, lubricate
with a grease gun after every 25 hours of tractor
operation.
Pivot Points & Linkage
Lubricate all the pivot points on the drive system,
clutch-brake pedal and lift linkage at least once a
season with light oil.
Steering Shaft and Gear
Steering Shaft and Gear
Lubricate teeth of steering gears with automotive multi-
purpose grease after every 25 hours of operation or
Figure 24
once a season. See Figure 24.
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