TM-9-2320-285-24-2
TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1
TECHNICAL MANUAL; ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1985
TM-9-2320-285-24-2 - Page 95 of 698
TM 9-2320-285-24-2
Section III.
POWER TRAIN MAINTENANCE
This section contains the information you need to maintain the:
•
Transmission including Torque Converter * Front Axle
•
Rear Axle
It gives you instructions on how to troubleshoot problems, and repair or replace the
components that are
within the scope of direct support maintenance.
Para
Troubleshooting Symptom Index .
...............................................................
3-13
Transmission Troubleshooting .
..................................................................
3-14
Front Axle Troubleshooting .
........................................................................
3-15
Rear Axle Troubleshooting.
.........................................................................
3-16
Transmission Maintenance .
........................................................................
3-17
Testing.
...................................................................................................
3-17a
Road Test .
.......................................................................................
3-17a(1)
Hydraulic Pressure Test.
..................................................................
3-17a(2)
Transmission Stall Tes
t ...................................................................
3-17a(3)
Speed Shift Adjustments .
.......................................................................
3-17b
Replacement .
.........................................................................................
3-17c
Summary Procedure Covering Replacement .
.................................
3-17c(1)
Detailed Procedure Covering Replacement.
....................................
3-17c(2)
Torque Converter .
..................................................................................
3-17d
Modulator Assembly.
..............................................................................
3-17e
Transmission Mount .
..............................................................................
3-17f
Front Axle Maintenance .
.............................................................................
3-18
Rear Axle Maintenance.
..............................................................................
3-19
Axle Assembly.
.......................................................................................
3-19a
Differentia
l ..............................................................................................
3-19b
3-13
.
TROUBLESHOOTING SYMPTOM INDEX
Para/Malfunction
Page
TRANSMISSION
Transmission fluid is milky .
........................................................................................
3-14/1
3-90
Transmission overheating .
.........................................................................................
3-14/2
3-90
Low lubrication pressure .
...........................................................................................
3-14/3
3-91
Low main pressure in all ranges.
................................................................................
3-14/4
3-91
No response to shift lever movement.
........................................................................
3-14/5
3-92
All automatic shifts occur at too high speed.
..............................................................
3-14/6
3-92
Individual shift (2-3, 3-4, 4-5) occurs at too high
speed.
.........................................................................................................................
3-14/7
3-92
All automatic shifts occur at too low speed .
...............................................................
3-14/8
3-93
Individual shift (2-3, 3-4, 4-5) occurs at too low
speed.
.........................................................................................................................
3-14/9
3-93
Slow or erratic shifting.
...............................................................................................
3-14/10
3-93
Rough shifting .
...........................................................................................................
3-14/11
3-93
Clutch slippage in all forward gears .
..........................................................................
3-14/12
3-94
3-89
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