Walker DB6660 用户手册

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Gearboxes are permanently lubricated and
sealed requiring no scheduled lubrication.
Oil level should be checked only when an oil
leak is noted.  Refer to Rotary Broom Gear-
box in this section.

Grease every eight (8) hours.

NOTE: Tractor Lubrication Points are not shown here.

For Tractor Lubrication Points, refer to the ap-
propriate Tractor 

 or