User's Manual
307623H 11
Troubleshooting
WARNING
To reduce the risk of serious bodily injury, including
fluid injection, injury from moving parts, and splash-
ing in the eyes or on the skin, always follow the
Pressure Relief Procedure on page 8 whenever
you shut off the pump, check, service, clean or
repair any part of the system.
1. Stop pump immediately if it is running too fast;
check fluid supply. If empty, refill and reprime the
pump; eliminate all air from system. Or flush the
pump and store with mineral spirits in it.
2. Relieve pressure. Disconnect fluid line. If pump
starts when hydraulic power is restored, the hy-
draulic line, valves, filters, etc are clogged.
3. Always stop the pump at the bottom of its stroke
and keep the packing nut 1/3 full with TSL.
PROBLEM
CAUSE SOLUTION
Pump operates, but output low on
both strokes
Restricted lines or inadequate hy-
draulic supply.
Clear lines; increase hydraulic sup-
ply.
Insufficient hydraulic pressure;
closed or clogged valves, etc.
Open; clean.
Exhausted fluid supply. Refill and reprime, or flush
1
.
Clogged fluid line, valves, etc. Clear
2
.
Packing nut too tight. Loosen.
Loose packing nut or worn pack-
ings.
Tighten; replace.
Pump operates, but output low on
down stroke
Held open or worn intake valve. Clear; service. See manual 306981.
Pump operates, but low on up
stroke
Held open or worn piston or pack-
ings.
Clear; service. See manual 306981.
Erratic pump operation Exhausted fluid supply. Refill and reprime, or flush
1
Held open or worn intake valve or
piston packings.
Clear; service. See manual 306981.
Excessive hydraulic fluid supply vol-
ume.
Lower.
Air entrained in fluid. Purge all air; change fluid.
Pump fails to operate Restricted lines or inadequate hy-
draulic supply.
Clear; increase.
Insufficient hydraulic pressure;
closed or clogged valves, etc.
Open; clean.
Exhausted fluid supply. Refill and reprime, or flush
1
.
Clogged fluid line, valves, etc. Clear
2
.
Damaged hydraulic reciprocator. Service; see manual 307654.
Dried fluid seizure of displacement
pump.
Service
3
. See manual 306981.