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i need to completely purge my hydraulic system on 1974 case 780 backhoe. oil is water contaminated. the system holds 45 gal what is the best method to use the least new oil? my plan is drain tank, refill. connect return hose to used barrel, extend each ram system fully out as fast as possible. shut down. let all rams possible freefall to the down cylinder position to drain. refill. start up. extend again, each direction. shut down. hook up return hose. refill. DONE. can i cause any damage to cylinders by extending fully while oil is not returning to tank(used contaminated to barrel)being careful not to run main pump dry. other things to be careful of? is there a standard procedure for this job?? thanks. dan

backhoe complete hydraulic purge procedure
Case
Replies 3 Post by bigdanallan