Maintenance; Troubleshooting Procedures - Manitowoc Grove RT880E Service And Maintenance Manual

POWER TRAIN
There are bleed balls in the clutch piston which allow quick
escape for oil when the pressure to the piston is released.

Maintenance

General Information
1. Always check the oil level with the engine idling, and the
transmission in neutral and at normal operating temper-
ature 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.

Troubleshooting Procedures

SYMPTOM
1. Low clutch pressure.
2. Low converter charging pump pres-
sure.
3. Overheating.
4. Noisy converter.
5. Lack of power.
7-28
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.
PROBABLE CAUSE
a. Low oil level.
b. Clutch pressure
valve spool stuck open.
c. Faulty charging pump.
d. Broken or worn clutch shaft or
piston sealing rings.
e. Clutch piston bleed valve stuck
open.
a. Low oil level.
b. Suction screen plugged.
c. Defective oil pump.
a. Worn oil sealing rings.
b. Worn oil pump.
c. Low oil level.
a. Worn oil pump.
b. Worn or damaged bearings.
a. Low engine RPM at converter
stall.
b. See "Overheating" and make
same checks.
Published 11-10-2014, Control # 524-00
RT880E SERVICE MANUAL
a. Fill to proper level.
regulating b. Clean valve spool and housing.
c. Replace pump.
d. Replace clutch shaft or sealing
rings, as applicable.
e. Clean bleed valves thoroughly.
a. Fill to proper level.
b. Clean suction screen.
c. Replace pump.
a. Remove,
rebuild converter assembly.
b. Replace pump.
c. Fill to proper level.
a. Replace pump.
b. A complete disassembly will be
necessary to determine what
bearing is faulty.
a. Tune engine and check
governor.
b. Make corrections as explained
in "Overheating."
REMEDY
disassemble, and