Graco 236865 Automobile Parts User Manual


 
Repair
8 308395D
Shutdown
Always shut off the supply line shutoff valve (E) first, and
then the return line shutoff valve (G). This is to prevent
over pressurizing the reciprocator or its seals. When
starting the hydraulic system, open the return line shut-
off valve (G) first. See page 5.
Repair
There are two basic repairs to the hydraulic fluid control;
pressure control repair and flow control repair.
Pressure Control Repair
1. Relieve pressure, see page 7.
2. Remove the pressure reducing valve (J).
3. Clean the pressure reducing valve (J) with a com-
patible solvent.
4. Install the pressure reducing valve in the control.
5. Try the system with the clean valve. Follow the
Starting the Pump procedure on page 7.
6. If the control still does not regulate the pressure
properly, replace the valve.
Flow Control Repair
1. Relieve pressure, see page 7.
2. Remove the flow control valve (K).
3. Clean the flow control valve (K) with compatible sol-
vent.
4. Install the flow control valve in the control.
5. Try the system with the clean valve. Follow the
Starting the Pump procedure on page 7.
6. If the control still does not control the flow properly,
replace the valve.