C4, TM 9-2350-230-12
TABLE 8-2.1. TROUBLEDHOOTING INDEX
TABLE
TABLE
COMPONENT
REFERENCE
COMPONENT
REFERENCE
Transmission
Turret Elec. Drive Control
Engine
Turret Traverse Mechanism
Hull Electrical
Elevating Mechanism
Generating System
Conventional Weapons Elect.
Tracks and Suspension
Missile Subsystem
Personnel Heater
M81 Gun-Launcher
Winterization Kit
Gun-Launcher Mount
Bilge Pump
Sighting & Fire Control
Turret Elec. Accessories
Commander's Cupola
Electrical Troubleshooting
Source of leakage must be determined and the condition
8-8. Engine
corrected to avoid damage to transmission. Notify
support maintenance.
a. Starting, fuel, lubrication, coolant, and oil cooling
systems are all regarded as being part of the engine, and
will be treated as such in this manual. Trouble in any one
pressure checking transmission in vehicle.
of these systems will be reflected in engine performance;
therefore, corrective action for these troubles is
b. Pressure Check Points. To aid in troubleshooting
contained in the engine section of the troubleshooting
and testing, a number of plugged openings are provided
table.
for checking operating pressures (fig. 8-1). These plugs
can be removed for connection of pressure gage 4910-
b. When troubleshooting the engine or one of the
572-8612. Use these pressure test points to locate
systems mentioned in a. above, open the power plant
abnormal pressures that indicate transmission
exhaust grilles for access to components of the engine
malfunctions.
or its various systems.
CAUTION: Stop engine each time before re- moving
c. During all tests, observe pressure and
temperature warning lights on driver's indicator panel.
or installing pipe plugs and attaching gage adapter.
Install plug as soon as gage adapter is removed.
d. Check engine oil and water, and transmission oil
Remove only the plug necessary to perform the desired
levels before starting the engine. Add if necessary.
test.
e. Warm up engine to operating temperature
c. The chart in table 8-3 lists normal hydraulic
before conducting tests.
pressures under various operating conditions with an
engine speed of 1500 rpm or as specified in table. Small
variations in pressure from those given in the chart do
64).
not necessarily mean that malfunctions exist.
Malfunctions will cause radical changes in pressure.
Table 8-4 will furnish probable causes of
any abnormal
8-9. Transmission
test results.
a. Transmission Oil Level. Before making pressure
NOTE. Should any of the pressure or temperature
tests, check transmission oil level and add oil if
warning lights indicate malfunctions, the engine must be
necessary. The cross drive transmission does not burn
stopped and the cause determined.
or use oil as an engine does. Consequently, if
transmission oil level is found to be low at frequent
d. Use of the intercommunication set (fig. 7-5) will
checking periods, the cause is due to leakage.
facilitate communication with the driver.
8-9