TM 1-1740-221-13&P&P
FIELD MAINTENANCE
SOLENOID VALVE (3-POSITION/SINGLE SOLENOID)
INITIAL SETUP:
Test Equipment
Sealant, Loctite 242 (WP 0156, Item 37)
Multimeter (WP 0157, Item 14)
Personnel Required
91B, Light Wheel Vehicle Mechanic (2)
Tools and Special Tools
General Mechanic Tool Box (WP 0157, Item 24)
References
Torque Wrench, 10 ft-lb (WP 0157, Item 26)
Materials/Parts
Equipment Condition
Fluid, Transmission (WP 0156, Item 23)
Engine Shut Down
Rag, Wiping A-A-531 (WP 0156, Item 34)
INSPECTION
Inspect all solenoid valve(s) for mounting security, leaks, damaged wiring or wiring connectors or for any damage
affecting serviceability.
END OF TASK
OHMS TEST
Forward and Reverse Solenoids
NOTE
Removal of the center deck plate is required to access the solenoid valves (WP 0028).
All seven solenoid coils (Figure 1) are ohms tested using the same procedure.
Always tag the solenoid wiring connectors before removal to aid in reinstallation.
1.
Remove all solenoid wiring connectors (Figure 2, Item 1).
2.
Ohms test across solenoid connector pins (Figure 1, Item 2).
3.
Resistance measured for all solenoids should be 5 ohms nominally.
4.
Replace any solenoid coil, which fails the ohms test.
4 Wheel Drive Solenoid (Figure 5)
1. Remove 4-wheel drive solenoid wiring connector (same as) (Figure 2, Item 1).
2. Ohms test across solenoid connector pins (Figure 5, Item 6).
3. Resistance measured at the solenoid should be 7.5 ohms nominally..
4. Replace solenoid coil if ohms test fails.
END OF TASK
VOLTAGE TEST
Reverse Solenoid Voltage Tests
NOTE
A transmission solenoid voltage test reading between 0 and 9 volts is not acceptable.
00491