HOIST AND COUNTERWEIGHT RT9130E SERVICE MANUAL
5-4 Published 08-25-09, Control # 077-04
Removal
1. Remove all cable from the hoist drum.
2. Tag and disconnect the hydraulic lines to the hoist. Cap
or plug all lines and openings.
3. Tag and disconnect the electrical wires to the hoist
rotation indicator sensor box.
4. Tag and disconnect the electrical wires to the hoist motor
high speed solenoid valve.
NOTE: To remove the right front capscrew, the hose reel
rear cover must first be removed.
5. Remove the hoist mounting nuts, capscrews, washers,
and shims (if shims are used, mark their location).
NOTE: The hoist assembly, less the cable, weighs
approximately 835 kg (1841 pounds).
6. Using an adequate lifting device, remove the hoist from
the crane.
The hoist will not raise the rated
load (continued)
c. Make sure hydraulic system
temperature is not more than
180 degrees F. Excessive
hydraulic oil temperature
increase motor internal
leakage and reduce motor
performance.
a. Same as 4a and 4b
5. The hoist runs hot a. Same as 4a a. Same as 4a
b. Make sure the hydraulic
system temperature is not
more than 180 degrees F.
Excessive hydraulic oil
temperatures may be caused
by:
• Plugged heat exchanger.
• Hydraulic oil level in
reservoir too low or too
high.
• System relief valve may
be set too low.
• Hydraulic pump not
operating efficiently.
• Excessively worn or
damaged internal hoist
parts.
• Thoroughly clean
exterior and flush
interior.
• Drain/fill to proper level.
• Check relief pressure.
Refer to Section 2 -
Pressure Setting
Procedures.
• Pump worn. Replace
pump.
• Disassembly hoist.
Inspect/replace worn
parts.
6. Hoist chatters while raising rated
load.
a. Same as 4b a. Same as 4b
b. Hydraulic oil flow to motor
may be too low.
b. Same as 5b
Symptom Probable Cause Solution
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