TM 5-3805-258-24-1S Y S T E M S O P E R A T I O NA I R S Y S T E M A N D B R A K E SBRAKE SYSTEM(Models950BNSCE and BSCE)18. Junction block on rearaxle.19. Drain valve.20. Air compressorgovernor.21. Air compressor.22. Air/hydraulic cylinder forrear brakes.23. Fluid reservoir for rearbrakes.24. Brake fluid pressureindicator.25. Brake fluid pressure(overstroke) switches forwheel brakes (NormallyClosed).1. Line to EMS warningsignals.2. Air pressure switch forwheel brakes (NormallyOpen).3. Control valve forsecondary and parkingbrake.4. Line to transmissionneutralizer group.5. Ah pressure switch forparking brake(NormallyOpen).6. Line from compressorto air dryer.7. Unloader line.8. Air reservoir.9. Air horns (two).10. Air hornvalve (footoperated).11. Brake control valve forleft pedal.12. Leftpedal.13. Line to transmissionneutralizer valve.14. Brake chamber forsecondary and parkingbrake.15. Secondary and parkingbrake.16. Quick releasevalve.17. Junction block on frontaxle.26. Air/hydraulic cylinder forfront brakes.27. Fluid reservoir for frontbrakes.28. Brake air pressureindicator.29. Brake control valve forright pedal.30. Right pedal.31. Air pressure switch forstop lights (NormallyOpen).32. Double check valve.33. Orifice check valve.34. Wheel brakas (four).35. Air dryar.All of the wheel brakes in the brake system are cali-per/disc brakes. There are brakes at all four wheels(wheel brakes) and one separate brake (secondary andparking brake) on the front drive shaft. Secondary andparking brake (15) is a shoe-type brake. It is activatedby brake chamber (14) which is activated by springsand released by air. Wheel brakes (34) are activated bybrake fluid but the brake fluid is activated by air.The wheel brakes are controlled by two pedals in theoperator’s station. When right pedal (30) is pushed,only the wheel brakes are activated. When left pedal(12) is pushed, the transmission is first disengaged (notengaged) and then, the wheel brakes are activated. Fullengine power can be used in the hydraulic system whenthe transmission is disengaged. When left pedal (12) isreleased, the transmission engages before the wheel3-70.1/3-70.2 (blank)
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