TM 5-3805-290-23-1
TRANSMISSION TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0014 00
TRANSMISSION PRESSURES TEST AND ADJUSTMENT - CONTINUED
N OT E
Machine can overcome service brakes when engine is at high idle.
5.
Press and hold brake pedal. Disengage parking brake. Ensure machine is in FIRST SPEED position (TM 5-3805-290-
10). Check pressure gages. Shift transmission direction and shift lever from NEUTRAL to FORWARD position.
Increase engine speed to high idle. Ensure transmission oil is at normal operating temperature (TM 5-3805-290-10).
Needle on pressure gage for clutch 1 should rise. Needle on pressure gage for clutch 6 should rise. Pressure readings
must be within values in Table 5.
6.
With transmission in FORWARD position, shift through remaining forward speeds and note clutch pressures for each
speed. Return to FIRST SPEED position (TM 5-3805-290-10). Use transmission direction and shift lever. Pressure read-
ing for each energized clutch must be within values in Table 1. This checks pressure of all speed clutches.
7.
Repeat step 6 for all reverse speeds. Same pressure levels should be noted in all reverse speeds.
8.
Repeat steps 5 thru 8 with engine at low idle. Same pressures should be observed. If pressures are lower, there is leak in
transmission control system.
Transmission Clutch Pressure Adjustment
N OT E
Transmission clutches should have the same clutch pressure.
1.
If pressure readings for all transmission clutches are not within values shown in Table 5, transmission relief valve may
need to be adjusted. Refer to Transmission Oil Pump Pressure Adjustment in this work package for proper adjustment
procedure.
2.
If one transmission clutch pressure is not within specification, ensure modulating valve for that clutch is operating cor-
rectly. Perform Solenoid Valve (Transmission Clutch) Testing in this work package.
Table 5. Transmission Pressures.
Pressure Tap
Specifications
Actual Pressure
Modulating valve for clutch 1
350 25 psi
(2,400 170 kPa)
Modulating valve for clutch 2
350 25 psi
(2,400 170 kPa)
Modulating valve for clutch 3
350 25 psi
(2,400 170 kPa)
Modulating valve for clutch 4
350 25 psi
(2,400 170 kPa)
Modulating valve for clutch 5
350 25 psi
(2,400 170 kPa)
Modulating valve for clutch 6
350 25 psi
(2,400 170 kPa)
0014 00-21
