Manitowoc Grove RT9130E-2 - Maintenance

Grove Published 11-22-2016, Control # 345-12 4-25
RT9130E-2 SERVICE MANUAL BOOM
4
Maintenance
Table 4-2: Troubleshooting
SYMPTOM PROBABLE CAUSE SOLUTION
1. Erratic operation of
extending
telescoping
cylinder.
a. Low hydraulic oil level. a. Check system for leaks. Make repairs
as needed. Fill reservoir.
b. Damaged relief valves. b. Repair or replace relief valves.
c. Air in telescope cylinder. c. Bleed by lowering telescope cylinder
below horizontal.
d. Low engine rpm. d. Increase engine rpm to recommended
setting.
e. Lack of lubrication on boom sections. e. Properly lubricate all boom sections.
f. Extremely tight boom extension
sheaves.
f. Inspect and properly lubricate boom
extension sheaves.
g. Improper boom alignment caused from
side loading.
g. Reduce and properly hoist load.
h. Worn boom wear pads. h. Replace wear pads and properly
lubricate.
i. Distorted boom section. i. Replace distorted section.
j. Damaged telescope cylinder. j. Repair or replace cylinder.
k. Clogged, broken, or loose hydraulic
lines or fittings.
k. Clean, tighten, or replace lines or
fittings.
l. Damaged control valve. l. Repair or replace control valve.