W T E C I I I E L E C T R O N I C C O N T R O L S T R O U B L E S H O O T I N G M A N U A L
0011 00125
APPENDIX B CHECKING CLUTCH AND RETARDER PRESSURES
C.
Comparing Recorded Data to Specifications
1. Be sure that engine speed and transmission sump fluid temperatures were within the values
specified in Table B1.
2. Compare the main pressure and clutch pressure data, recorded in Step B, with the specifications in
Table B2.
3. If clutch pressures are within specifications, return the transmission and vehicle to their original
configuration and proceed with electrical troubleshooting.
4. If clutch pressures are not within specification, take corrective action to replace the internal parts
of the transmission necessary to correct the problem. (Refer to the Transmission Service Manual
for the model being checked.)
5. Recheck pressure values after the transmission has been repaired.
6. Return the transmission to its original configuration. (Remove instrumentation and reinstall any
components removed for the pressure testing.)
MD 3070 High Speed
20802120
7193ºC
(160200ºF)
Reverse
Neutral
LowC
1C
2C
2L
3L
4L
5L
6L
C3 C5
C5
C3 C6
C1 C5
C1 C4
C1 C4 LU
C1 C3 LU
C1 C2 LU
C2 C3 LU
C2 C4 LU
HD/B500 High Speed
17801820
7193ºC
(160200ºF)
Reverse
Neutral
LowC**
1C
2C
2L
3L
4L
5L
6L
C3 C5
C5
C1 C6
C1 C5
C1 C4
C1 C4 LU
C1 C3 LU
C1 C2 LU
C2 C3 LU
C2 C4 LU
** Only applies to HD 4070.
Table B1. Clutch Pressure Test Conditions (Continued)
Transmission Model/
Test Type
Engine rpm
Sump Fluid
Temperature
Range
Clutches Pressurized