Graco 96A390, Инструкция-перечень запасных частей

Страница: 14 / 26

14 310570
Troubleshooting
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow
the
Pressure Relief Procedure (page 10).
For pump service see manual 309136. For hydraulic motor service see manual 308048.
Problem Cause(s) Solution(s)
Pump output low on both strokes Restricted hydraulic lines Clear any obstructions; be sure all
valves are open; increase pressure.
Empty fluid supply Refill and reprime pump. In an air-pow-
ered system, use pump runaway valve.
Clogged fluid outlet line, valves, etc. Clear.
Worn packings Tighten packing nut; replace all pack-
ings. See 309136.
Pump output low on only one stroke Held open or worn check valve Check and repair. See 309136.
Worn piston packings Replace. See 309136.
No output Improperly installed ball check valves Check and correct. See 309136.
Pump operates erratically Exhausted fluid supply Refill and reprime pump. In an air-pow-
ered system, use pump runaway valve.
Held open or worn check valves Check and repair. See 309136.
Worn piston packings Replace. See 309136.
Pump does not operate Restricted hydraulic power supply
lines Clear any obstructions; be sure all shut-
off valves are open; increase pressure.
Exhausted fluid supply Refill and reprime pump.
Clogged fluid outlet line, valves, etc. Clear.
Damaged hydraulic motor See 308048.
Fluid dried on piston rod Disassemble and clean pump. Stop
pump at bottom of stroke. See 309136.