1 | Test power outlet (38.02) |
B42.10-0427-01
Represented in vehicle 664 - O 371, O 400 |
2 | Relay valve connection (16.01) |
B42.20-0010-01
1 | Make sure that the vehicle is immobilized | Apply wheel chocks. | |
2 | Release the parking brake | ||
3 | Connect the flexible tube to inflate the tires on the test power outlet (1)(38.02) and the spare tire | In case of compressed air failure at the combination cylinder power accumulator, the parking brake may be released with the compressed air from the spare tire. | |
4 | Apply air to the combination cylinder power accumulator | Until the parking brake indicator light turns off (approximately 6.5 bar). | |
5 | Pneumatically disengage the combined cylinder | For model 664 only, follow work steps 5, 6, 7, 8 | |
The pneumatic device for emergency release is incorporated in the manual parking brake valve and its operation is automatic. | |||
6 | Run engine until work pressure is reached | ||
7 | Fully depressurize the parking brake pneumatic circuit, unfastening the relay valve connection (2) | ||
8 | Place the parking brake manual lever in released brake position | The parking brake should release. |