Index Freightliner Freightliner Business Class M2 (M2 100, M2 106, M2 106V, M2 112, M2 112V) - service repair manual
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42–10 Brake Pedal Linkage and Mounting Plate Inspect the pedal, pedal linkage, and mounting plate 42–11 Air Brake Inspecting and Leak Test IMPORTANT: If any of the tests in the following WARNING Some steps in this operation require the parking 1. With the vehicle parked on a level surface, shut 2. Completely drain all air reservoirs. 3. Install accurate test gauges in the primary and 4. Start the engine and run it at a fast idle. 5. Record reservoir pressures when the low- 6. Record governor cut-out pressure and air dryer 7. Reduce service air pressure by applying and re- 8. Charge the air system to governor cut-out, shut 9. Allow pressure to stabilize for one minute. 10. Observe the installed service reservoir gauges. The pressure should not drop more than 10 psi 11. If necessary, start the engine and charge the air system. Shut down the engine and release the 12. Make and hold a full service brake application, allowing the pressure to stabilize for one minute. 13. With the air system at full pressure and the en- gine idling, perform the following: • On trucks, operate the parking brake con- trol valve and note that the parking brakes • On tractors, operate the trailer supply con- trol valve knob. Note the air coming out of 14. Build air system pressure to cut-out and shut down the engine. 15. Completely drain the secondary (front axle) res- ervoir. On vehicles equipped with a Dryer Reser- 16. Make a service brake application. The rear axle brakes should apply and release and the brake On tractors, with the trailer supply knob pushed 17. Push the trailer air supply valve knob in. With the secondary reservoir still completely drained, Brakes 42 Business Class M2 Maintenance Manual, November 2015 42/10 |