AR27.60-D-1120A | Check modulating and working pressure | 10.11.09 |
TRANSMISSION 722.330 in MODEL 901.3, 902.3, 903.3 with ENGINE 601.943
TRANSMISSION 722.375 in MODEL 901.4, 902.4, 903.4, 904.4 with ENGINE 602.980
TRANSMISSION 722.376 in MODEL 901.06, 902.0, 903.0, 904.0 with ENGINE 111.979
TRANSMISSION 722.337 in MODEL 903.312 /362 with ENGINE 601.943 with CODE (Z22) Post freight delivery service
TRANSMISSION 722.332 in MODEL 903.462 /463 with ENGINE 602.980 with CODE (ZB2) FedEx package
D27.10-0013-06
Check modulating pressure
1 Vacuum line
2 Vacuum reservoir
3 Measuring instrument pressure line
4 Banjo bolt
5 Sealing ring
M Test connection for modulating pressure
(measuring range up to 10 bar).
D27.10-0012-06
Check working pressure
4 Banjo bolt
5 Sealing ring
6 Measuring instrument pressure line
A Test connection for working pressure
(measuring range up to 25 bar).
| Checking | ||
The modulating pressure is used to influence the working pressure level. The working pressure is used to actuate the multidisk brake B3, brake bands and couplings. | |||
1 | Check vacuum control. | ||
2 | Heat transmission up to operating temperature. | ||
3 | Correct oil level in transmission | ||
4 | Detach vacuum line (1) from vacuum unit (2). | ||
5 | Connect test equipment for modulating pressure. | Test equipment (measuring range up to 10 bar) Remove screw plug (M) with sealing ring (5) for test connection modulating pressure. Connect pressure line (3) of test equipment with banjo bolt (4) and sealing rings (5) to test connection modulating pressure. Replace sealing rings (5). | |
| |||
6 | Connect test equipment for working pressure. | Test equipment (measuring range up to 25 bar) Remove screw plug (A) with sealing ring (5) for test connection working pressure. Connect pressure line (6) of test equipment with banjo bolt (4) and sealing rings (5) to test connection working pressure. Replace sealing rings (5) | |
| |||
| Measure | ||
7 | Read off modulating pressure under full-load conditions at 50 km/h. | When fastening the test equipment in the cab, the difference in height from the test equipment to the transmission means that 0.1 bar for each meter must be added to the pressure value readings. | |
The working pressure can be checked in combination with the modulating pressure The working pressure cannot be adjusted. If the working pressure is measured, care must be taken to ensure that the modulating pressure is set exactly. A deviation of the working pressure from the specified tabular value means that the valve body housing has to be repaired. | |||
8.1 | Check working pressure in selector lever position/ push-button shifting position "4" and increased idle speed. | Transmission 722.330/337/ 375/376 | |
8.2 | Check working pressure in push-button shifting position "D" and increased idle speed. | Transmission 722.332 | |
9 | Disconnect measuring instrument in reverse order. | |
Modulating pressure check values
Number | Designation | Transmission 722.332/375 | Transmission 722.376 | Transmission 722.330 | Transmission 722.337 | |
BE27.10-N-1001-01A | Modulating pressure | bar | 3,7 | 2.8 | 1.9 | 1.9 |
Working pressure check values
Number | Designation | Transmission 722.332/375 | Transmission 722.376 | Transmission 722.330 | Transmission 722.337 | |
BE27.10-N-1001-05A | Working pressure | bar | 12,9 | 9,6 | 8.5 | 8.5 |
Housing
Number | Designation | Transmission 722.330/332 | ||
BA27.40-N-1002-01B | Screw plug for measuring points for modulating pressure, control pressure and working pressure | Nm | 13 | |
123 589 04 21 00
Tester