Grove Published 11-22-2016, Control # 345-12 7-27
RT9130E-2 SERVICE MANUAL POWER TRAIN
Maintenance
General Information
1. Always check the oil level with the engine idling, and the
transmission in neutral and at normal operating
temperature—180 to 200 °F (82 to 93 °C).
2. Change the oil filter element every 500 hours. Drain and
refill the system every 1000 hours or 6 months. Refer to
Lubrication, page 9-1.
Troubleshooting
The following data is presented as an aid to locating the
source of difficulty in a malfunctioning unit. It is necessary to
consider the torque converter charging pump, transmission,
oil cooler, and connecting lines as a complete system when
checking for the source of trouble, since the proper operation
of any unit therein depends greatly on the condition and
operation of the others. By studying the principles of
operation together with the data in this section, it may be
possible to correct any malfunction which may occur in the
system. Troubleshooting procedures basically consist of
hydraulic checks.
Hydraulic Checks
Before checking the transmission/torque converter and
associated hydraulic system for pressures and rate of oil
flow, it is essential that the following preliminary checks be
made.
1. Check oil level in transmission. This should be done with
oil temperature at 180 to 200° F (82 to 93° C). Do not
attempt these checks with cold oil.
2. To bring the oil temperature to this level, it is necessary
to either work the machine or stall out the converter.
When it is impractical to work the machine, stall out the
converter as follows.
a. Apply the parking brake and service brakes.
b. Position the shift lever to forward and high speed.
c. Accelerate the engine to between half and three-
quarter throttle.
d. Hold converter stalled until desired temperature is
reached.
NOTE: Always make all troubleshooting checks with the
converter outlet temperature at least 180 to 200 °F
(82 to 93 °C).
Troubleshooting Procedures
Table 7-1
CAUTION
Possible Equipment Damage!
Full throttle stall speeds for an excessive length of time
will overheat the torque converter.
SYMPTOM PROBABLE CAUSE REMEDY
1. Low clutch pressure. a. Low oil level. a. Fill to proper level. Refer to
Lubrication, page 9-1
b. Clutch pressure regulating
valve spool stuck open.
b. Clean valve spool and housing.
c. Faulty charging pump. c. Replace pump. Refer to your
Manitowoc Crane Care Parts
Manual.
d. Broken or worn clutch shaft or
piston sealing rings.
d. Replace clutch shaft or sealing
rings, as applicable.
e. Clutch piston bleed valve stuck
open.
e. Clean bleed valves thoroughly.
2. Low converter charging pump
pressure.
a. Low oil level. a. Fill to proper level. Refer to
Lubrication, page 9-1
b. Suction screen plugged. b. Clean suction screen.
c. Defective oil pump. c. Replace pump. Refer to your
Manitowoc Crane Care Parts
Manual.
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