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
Transmission Has Hard Shift
Test Step 6. Verify Range Modulation
or Machine Loses Speed
Solenoid Status.
After Changing Direction -
1. Apply parking brake (TM 5-2420-
Continued
231-10).
2. Push and hold the M button on
transmission controller and start
and run machine (TM 5-2420-231-
10).
3. Place powershift lever in the F
position (TM 5-2420-231-10).
4. Select output test mode on front
Analog Output 00 Displays "Gd" -
display screen (WP 0006). Press
Turn ignition switch to the off position
the M button until analog output An
(TM 5-2420-231-10) and disconnect
00 is displayed. Output will display
batteries (WP 0157).
"Gd" for a good circuit, "Sc" for a
Replace transmission (WP 0213).
short to voltage circuit, or "oc" for
Proceed to Test Step 10.
an open/short to ground circuit.
Analog Output 00 Displays "oc" -
Proceed to Test Step 7.
Analog Output 00 Displays "Sc" -
Proceed to Test Step 9.
Test Step 7. Test Range Modulation
Solenoid and Circuits for a Short to
Ground.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
2. Disconnect powershift connector
wiring harness connector (WP
0007, Figure 20) from transmission
controller (WP 0168).
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 26 to 30 Ohms - Proceed
sure resistance between power-
to step 4.
shift connector wiring harness
Resistance Less Than 26 Ohms -
connector (WP 0007, Figure 20)
Replace transmission (WP 0213).
terminals H1 and K1. Monitor and
Proceed to Test Step 10.
record resistance. Resistance
Resistance Greater Than 30 Ohms -
should be 26 to 30 ohms.
Proceed to Test Step 8.
4. Remove front floor cover plate
(WP 0306).
0054-5