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Komatsu pc45mr-1 hydraulic issue

keverg ยท 2026-09-01 18:46

Hello. Have a 2003 pc45mr-1 that has started to get hot very quickly and developed slow bucket and arm curl in. They operate normally on the out stroke. But much slower on the in stroke. Put test gauge on main pump ports and the pilot pump port, and they are textbook correct according to the manual. I also switched the lines on the bucket movement. And the problem reversed with them (bucket curled in normal. And was slow outward) does this mean anything? Any help , much appreciated. Thanks all.

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