1900 YRM 1018 Troubleshooting
PROBLEM POSSIBLE CAUSE PROCEDURE OR ACTION
Rod spontaneou
sly retracts.
Scores on inner
surface of tube.
Smooth surface
with an oil stone.
Score on tube. Replace cylind
er tube.
Scoreonpisto
nring.
Replace pisto
nring.
Foreign matte
r on packing ring.
Replace packi
ng.
Considerabl
escoreonlipofpacking
ring.
Replace pack
ing.
Unusual dist
ortion of packing ring.
Replace pack
ing.
Wear limit (clearance between
cylinder tube and wear ring).
Excessive clearance between cylinder
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 pres
sure fails to rise.
Improper
ly adjusted relief valve.
Increase
to specified pressure using a
pressure
gauge.
Relief v
alve clogged.
Disasse
mble and clean with fresh oil.
Interfe
ring relief valve or broken relief
spring.
Disasse
mble valve and replace spring.
Air suc
tion.
Check p
iping on suction side for leaks.
Add oil
to reservoir.
Check p
ump seals.
13
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