SP000068Axial Piston Pump
Page 36
Special Tools and Materials
Tools
Troubleshooting, Testing and Adjustment
In case a functional fault probably resulting from the regulator
occurs, disassemble and inspect it, referring to the maintenance
manual.
Prime Mover is Overloaded
Determine which is faulty, the front pump or rear pump, by
loading each pump independently. When both pumps are found
faulty, investigate the following (1 and 2). Begin investigation
with (3), when only one pump is found faulty. (1 and 2) are only
for cases of the variable horsepower contr28
ol.
1. Check that the power shift command current I is normal.
2. The power shift pressure is low:
• Check the amplifier dither.
• Replace the proportional pressure reducing valve.
3. The compensating piston (621) and compensating rod
(623) are stuck with each other:
• Disassemble and clean the regulator.
4. The Pin (898) is stuck:
• Disassemble and clean the regulator.
Name Description
Allen Wrench
4,5,6
(Dimension B mm)
Socket Wrench, Double-ended (Single-
ended) Wrench
Adjustable Wrench Small size (max. 36 mm)
Screwdriver
Plastic Hammer
Torque Wrench
Pliers 2 sets for retaining ring
Steel Bar 4 mm or less in dia., L=100 mm
Pincers
Bolt M4, L = about 50 mm
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