Go Bottom3-pt on Mitsu D1500
 | Oregonfarmer
Join Date: Posts: 1 
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2003-05-03 54244
Have a nice running D1500, but the hydraulics are extremly wee. The pressure gauge reads about 600 and drops to 300.
Other than a weak pump what could the trouble be?
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| TomG
Join Date: Feb 2002 Posts: 5406 Upper Ottawa Valley 
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2003-05-04 54264
If you have a gauge, you've probably already checked the level, filters and screens and for frothy or hot oil after some operation.
You might say if the pressure was checked at the 3ph cylinder or from a hydraulic manifold block and if the tractor has power steering fed from a priority valve.
A pressure test at a block would be preferable since the only components in the system would be the pump and relief valve. The general idea is to take a pressure reading from the auxiliary system port and rotate the diverter valve just long enough to take a reading. If the pressure is low, inspect the relief valve and increase the pressure adjustment (takes shims on my Ford). Then measure it again to see if the pressure increases. If it doesn't then the pump is a likely cause.
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