TRANSMISSION TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
SOLENOID VALVE (TRANSMISSION CLUTCH) TESTING - CONTINUED
Solenoid Valves Test - Continued
WARN I N G
Use extreme caution when performing this test. Keep nonessential personnel away from area. Sudden
movement of machine may cause injury or death to personnel.
Engage parking brake. Shift transmission shift lever to NEUTRAL position. Shift remote F/N/R switch to NEUTRAL
Ensure transmission neutralizer override is enabled. Transmission neutralizer override is enabled when transmission
Press and hold right service brake pedal. Disengage parking brake. Ensure machine is in FIRST SPEED position (TM 5-
3805-290-10). Watch pressure gages. When transmission is in NEUTRAL, clutch 5 should be engaged. Move shift lever
Needle on pressure gage for clutch 1 should rise. Needle on pressure gage for clutch 6 should rise. With transmission in
FORWARD position, shift through remaining forward speeds and return to FIRST SPEED position. Use transmission
direction and shift lever to change speeds. Same pressure rise should be observed in each clutch when clutch is engaged.
Repeat steps 5 and 6 for all reverse speeds. Refer to Table 10 to identify clutches engaged for each direction and each
Table 10. Clutches That Are Engaged in Each Speed and in Each Direction.
Speed Range and Direction
Fourth Gear Forward
Clutch 2 and clutch 5
Third Gear Forward
Clutch 1 and clutch 5
Second Gear Forward
Clutch 1 and clutch 4
First Gear Forward
Clutch 1 and clutch 6
First Gear Reverse
Clutch 3 and clutch 6
Second Gear Reverse
Clutch 3 and clutch 4
Third Gear Reverse
Clutch 3 and clutch 5
If pressure rise is noted, solenoid and related electrical circuit are functioning correctly.
If pressure rise is not noted, use screwdriver to ensure solenoid coil is energized. If screwdriver is attracted to sole-
noid coil, this indicates solenoid coil is energized. Problem is in solenoid cartridge. Problem could be bent solenoid
stem, screen that is dirty or plugged, or spring that is weak or broken. Replace transmission control valve (WP
If screwdriver does not indicate solenoid coil is energized, problem is in electrical circuit.