TM-9-2320-386-24-1-2
2-1/2-TON, 6X6, M44A3 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; EXTENDED SERVICE PROGRAM (ESP); UNIT, DIRECT SUPPORT AND GENERAL SUPPORT; MAINTENANCE MANUAL; VOLUME 2 OF 2
MAY 2001
TM-9-2320-386-24-1-2 - Page 470 of 636
0372 00-2
TM 9-2320-386-24-1-2
0372 00
MODULATOR VALVE MAINTENANCE (Contd)
REMOVAL
Remove three screws (1) and modulator valve body (2) from plate (7) and control valve (8).
DISASSEMBLY
CAUTION
Before removing retainer pin, record position of adjusting ring
to retain the original calibration of modulator valve. Failure to
do so may cause transmission to operate improperly.
NOTE
Record position of adjusting ring for assembly.
1. Compress adjusting ring (6) and remove retainer pin (9) from modulator valve body (2). Ensure
position of adjusting ring (6) is recorded.
2. Remove adjusting ring (6), spring (5), modulator valve (4), and actuating rod (3) from modulator
valve body (2).
CLEANING AND INSPECTION
WARNING
Volatile mineral spirits burn easily and fumes can explode. Do not
smoke or allow flames nearby when using volatile mineral spirits.
Failure to do so may cause serious injury or death to personnel.
1. Clean all modulator valve parts with mineral spirits and dry with a lint-free rag.
2. Inspect modulator valve (4), actuating rod (3), and modulator valve body (2) for wear, scratches,
grooves, and burrs. Remove scratches and burrs with crocus cloth. Replace modulator valve (4),
actuating rod (3), or modulator valve body (2), if worn or grooved.
3. Inspect spring (5) for signs of overheating, wear, and damage. Replace spring (5) if worn or
damaged.
ASSEMBLY
1. Install actuating rod (3), modulator valve (4), and spring (5) in modulator valve body (2) with
adjusting ring (6).
2. Compress adjusting ring (6) and rotate adjusting ring (6) to recorded position.
3. Install retainer pin (9) on modulator valve body (2).
INSTALLATION
1. Install modulator valve body (2) on plate (7) and control valve (8) with three screws (1). Tighten
screws (1) 96-144 lb.-in. (11-16 N
•
m).
2. Install transmission control valve (WP 0371 00).
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