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