Piranha P65, Manual

Page: 24 / 53

Troubleshooting 24
P2 - Machine Starts but Will Not Operate
Determine if the problem is electrical or hydraulic by using the manual override
buttons located on the directional valve top and bottom sides. (Refer to page
45 , Item
11).
If the machine operates, the problem is electrical. Follow the procedure below:
1. Determine if problem exists in the front control box only, the rear control box only,
or in both control boxes.
A. If problem is isolated to one box only, check the internal wiring and wiring
harness with disconnect plug for loose connection.
B. If the problem exists in both boxes, follow the remaining procedures.
2.
Check wiring connections in the electrical enclosure.
3. Check the valve body wiring harness, including the disconnect plugs, for loose
connections.
4. Check coils in the directional control valve.
If the machine does not operate on manual override, the problem is hydraulic.
1. Check to determine if the pump is developing flow. If not:
A. See if motor rotation is correct.
B. Check motor / pump coupling (in models prior to S/N P3-5893) for tightness
on both shafts; and also check that insert is not damaged.
C. Check hydraulic suction line for tightness.
D. Check Oil level.
E. If the above checks out okay, the pump may be defective
2. Check to determine if the spool in the directional control valve is stuck in the
center position. If the valve is stuck, remove the end caps of the control valve
and free the spool. Inspect for contamination.