Spring Brakes Will Not Release (Normal Operation)

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TM-9-2330-326-14-P Semitrailer Tactical Drop Deck BreakBulk/Container Transporter 22-1/2 TON M871A3NSN 2330-01-458-6865 Manual

CR SCOTSEAL

TM 9-2330-326-14&P

H-29. TROUBLESHOOTING SPRING PARKING BRAKE (Cont.)

Spring Brakes Will Not Release (Normal Operation)

1. Insufficient air pressure.

2. Air leaks in spring brake air system.

3. Restrictions in spring brake air system.

4. Ruptured diaphragm and/or seal in spring brake section.

5. Broken spring causing malfunction.

Spring Brakes Cannot Be Mechanically Released

1. Release bolt stripped or broken.

2. Broken internal release mechanism.

3. Broken power spring blocking full release.

H-81