TM 5-2420-230-24-1
Maintenance & Service Manual
R & HR32000 3 & 6 Speed LD
TROUBLE SHOOTING GUIDE For The R
and H R Model. 32000 Transmission
The following data is presented as an aid to locating the source of
the others. By studying the principles of operation together with data in
this section, it may be possible to correct any malfunction which may
difficulty in a malfunctioning unit. It is necessary to consider the
occur in the system.
torque converter charging pump" transmission, oil cooler" and
TROUBLE SHOOTING PROCEDURE BASICALLY CONSISTS OF
connecting lines as a complete system when running down the source
TWO CLASSIFICATIONS: MECHANICAL AND HYDRAULIC.
of trouble since the proper operation of any Unit therein depends
greatly on the condition and operations of
MECHANICAL CHECKS
Prior to checking any part of the system from a hydraulic
2. Check shift levers and rods for binding or restrictions in travel
standpoint, the following mechanical checks should be made:
that would prevent full engagement. Shift levers by hand at control
valve, if full engagement cannot be obtained, difficulty may be in
1. A check should be made to be sure all control lever linkage is
control cover and valve assembly.
properly connected and adjusted at all connecting points.
HYDRAULIC CHECKS
Before checking on the torque converter, transmission, and allied
the converter. Where the former means is impractical, the latter means
hydraulic system for pressures and rate of oil flow, it is essential that
should be employed as follows:
the following preliminary checks be made:
Engage shift levers in forward and high speed and apply brakes.
Check oil level in transmission. This should be done with oil
Accelerate engine half to three-quarter throttle.
temperatures of 180 to 200 F. [82,2-93,3 C]. DO NOT A TEMPT
Hold stall until desired converter outlet temperature is reached.
THESE CHECKS WITH COLD OIL. To bring the oil temperature to
CAUTION: FULL THROTTLE STALL SPEEDS FOR AN EXCESSIVE
this specification it is necessary to either work the machine or "stall"
LENGTH OF TIME WILL OVERHEAT THE CONVERTER.
out
LOW CLUTCH PRESSURE
Cause
Remedy
1. Low oil level.
1. Fill to proper level.
2. Clutch pressure regulating valve spool stuck open.
2. Clean valve spool and housing.
3. Faulty charging pump.
3. Replace pump.
4. Broken or worn clutch shaft or piston sealing rings.
4. Replace sealing rings.
5. Clutch piston bleed valve stuck open,
5. Clean bleed valves thoroughly.
LOW CONVERTER CHARGING PUMP OUTPUT
1. Low oil level.
1. Fill to proper level.
2. Suction screen plugged.
2. Clean suction screen.
3. Air leaks at pump intake hose and connections or collapsed hose.
3. Tighten all connections or replace hose if necessary.
(R-32000 only)
4. Replace pump.
4. Defective oil pump.
OVERHEATING
1. Remove" disassemble, and rebuild converter assembly.
1.Worn oil sealing rings.
2. Replace.
3. Fill to proper level.
2. Worn oil pump.
4. Check oil line connections and tighten securely.
3. Low oil level.
4. Pump suction line taking air. (R-32000 only)
NOISY CONVERTER
1.Replace.
1. Worn coupling gears.
2. Replace.
2. Worn oil pump.
3. A complete disassembly will be necessary to determine what
3. Worn or damaged bearings.
bearing is faulty.
LACK OF POWER
1, Tune engine check governor,
1. Low engine RPM at converter stall.
2. Make corrections as explained in "Overheating."
2. See "Overheating" and make same checks.
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