PROBLEM POSSIBLE CAUSE PROCEDURE OR ACTION
Rod spontaneously retracts. Scores on inner surface of tube. Smooth surface with an oil stone.
Score on tube. Replace cylinder tube.
Score on piston ring. Replace piston ring.
Foreign matter on packing ring. Replace packing.
Considerable score on lip of pack-
ing ring.
Replace packing.
Unusual distortion of packing ring. Replace packing.
Wear limit (clearance between cylin-
der tube and wear ring).
Excessive clearance between cyl-
inder tube and wear ring.
Replace wear ring (included in
packing kit).
HYDRAULIC PUMP
PROBLEM POSSIBLE CAUSE PROCEDURE OR ACTION
Pump not delivering oil. Pump does not draw oil. Check pump, piping, and valves
for leaks.
Low oil level in reservoir. Check fluid level.
Clogged screen at pump inlet. Change oil and clean screen.
Pump pressure fails to rise. Improperly adjusted relief valve. Increase to specified pressure us-
ing a pressure gauge.
Relief valve clogged. Disassemble and clean with fresh
oil.
Interfering relief valve or broken re-
lief spring.
Disassemble valve and replace
spring.
Air suction. Check piping on suction side for
leaks.
Add oil to reservoir.
Check pump seals.
1900 YRM 1506 Troubleshooting
15
To Next Page
Loading...