JT520 Operator’s Manual Service - 119
Service Precautions
CMW
Working Under Drilling Unit
Before working under area of drilling unit supported by a stabilizer, make sure drilling unit is parked on hard
surface.
1. Remove yellow cylinder lock from storage at rear of pipe box and place over extended cylinder rod
(shown) with curved ends toward stabilizer shoe.
2. Raise stabilizer to lower unit until load is supported by cylinder lock.
Crushing weight could cause death or serious injury. Use
proper procedures and equipment or stay away.
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