Troubleshooting - Graco 236864 Instructions Manual

Troubleshooting

Problem
No pressure on gauge, or low pres-
sure on gauge
Can't adjust pressure with the pres-
sure reducing valve
Gauge will not re-zero with the
hydraulic supply and return line
shutoff valves closed
Pump runs away
308395D
Cause
Hydraulic power supply malfunction
or mis-adjustment
Pressure reducing valve is backed
out
Clogged valve
Insufficient hydraulic power supply
pressure
Leak in the supply line shutoff valve
(G)
Damaged gauge
Contaminated flow control valve
Troubleshooting
Solution
Adjust the hydraulic power supply. If
the problem remains, refer to the
hydraulic power supply instruction
manual.
Adjust the pressure reducing valve.
Clean the pressure reducing valve.
Adjust the hydraulic power supply
pressure. If problem remains refer
to the hydraulic power supply
instruction manual.
Open the return line shutoff valve
(E) to remove pressure.
Replace gauge.
Remove and clean the flow control
valve.
9