Air Brake Chamber
Rear air brake chambers must be free to breathe through the pushrod opening
and the 2 lower position vent holes in the spring brake chamber near the clamping
flange. Make sure these openings are clear. The 2 uppermost vent holes should
be plugged.
Leakage Test
- Block the wheels.
- Start the engine.
- Charge the air system to the air compressor governor valve cut-out point.
- Stop the engine.
- Have an assistant apply and hold the brake pedal.
- Apply a soap solution around the air brake chamber clamp and the breather
holes.
- Verify that no bubbles appear.
• | Lightly tap on the clamp and tighten the clamp bolts if bubbles appear. |
- Set the parking brake.
- Remove the wheel blocks.