m970 hydrostatic problems

Skidsteer Forum - Bobcat, New Holland, Case, John Deere

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aaronhe09

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Joined
Apr 15, 2012
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hi i am new to the skid steer world, i have a bobcat m-970, it works fine while cold but when it warms up after 15-20min of work time the left side starts losing power till it almost not working at all and engine bogs down when trying to. left side still will spin the tires and seems to have plenty of power. I looked through the service book and it said to do a charge pressure test. I did this running at idle it has about 180psi, at full rpm it has 220psi, and bogging down against a tree it drops to 30psi. the book says either the motor or pump is bad. is there anyway to tell if it is the pump or motor, or is there anything else i should check? i also looked through my parts brake down looking for a bronze filter skreen like i see mentioned on here a few times but cant find one anywhere. any help would be much appreciated! Thanks, Aaron
 

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