TM 5-2420-231-23-1
0054
Table 1. Transmission Has Hard Shift or Machine Loses Speed After
Changing Direction - Continued.
054
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. Press and hold the M button (Fig-
Transmission Has Hard Shift
Front Display Screen Illuminates "Ao
ure 2, Item 3) for at least 2 sec-
oc" - Proceed to Test Step 3.
or Machine Loses Speed
onds and check transmission
After Changing Direction -
Front Display Screen Illuminates "Ao
controller for diagnostic faults (WP
Sc" - Proceed to Test Step 5.
Continued
0006) and verify front display
No Diagnostic Fault Codes Are
screen (Figure 2. Item 2) illumi-
Displayed - Proceed to Test Step 6.
nates "Ao oc" or "Ao Sc".
Figure 2. Front Display Screen and Powershift Lever.
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Test Step 3. Test Direction
Modulation Solenoid.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
2. Remove instrument panel front
cover (WP 0174).
NOTE
Resistance of solenoids should be tested with machine completely cool
and temperature at 68F (20C). Higher temperature will increase the
3. Using a digital multimeter, mea-
Resistance 3.2 to 5.2 Ohms - Replace
sure resistance between power-
transmission controller (WP 0168).
shift connector wiring harness
Proceed to Test Step 10.
connector (WP 0007, Figure 20)
Resistance Less Than 3.2 Ohms -
terminals C1 and K1. Monitor and
Replace transmission (WP 0213).
record resistance. Resistance
Proceed to Test Step 10.
should be 3.2 to 5.2 ohms.
Resistance Greater Than 5.2 Ohms -
Proceed to Test Step 4.
