TM 9-2330-390-14&PTable 3-1. Operator/Crew Troubleshooting (Con't).MALFUNCTIONTEST OR INSPECTIONCORRECTlVE ACTIONBRAKE SYSTEM5. NO BRAKES OR WEAK BRAKES.Step 1.Step 2.Step 3.Step 4.Step 5.Step 6.step 7.Check air gage in towing vehicle to ensure that adequate air pressure has been built. Air gageshould read at least 80 psi (552 kPa).If air gage reading is low, notify Unit Maintenance.Check air valves at rear of towing vehicle to ensure that they are open.Open air valves (see towing vehicle Operator’s Manual).lf tandem towing, check that shutoff valves at rear of towing dolly set are open.Open shutoff valves (see paragraph 2-19).lf only one dolly set is being towed, check that shutoff valves at rear of dolly set are closed.Close shutoff valves (see paragraph 2-19).Check intervehicular and intradolly service and emergency air hoses for proper connection.Properly connect intervehicular and intradolly service and emergency air hoses (seeparagraph 2-11).Check for open air reservoir draincocks.Close air reservoir draincocks (see paragraph 3-6).Check intervehicular, intradolly, and all other air hoses for kinks, cuts, breaks, or looseconnections. Be alert for sound of leaking air.Remove kinked intervehicular or lntradolly air hoses, remove kinks, and connect.If air hoses are damaged, notify Unit Maintenance.6. PARKING BRAKES (REAR DOLLY) DO NOT HOLD.Step 1.Check parking brake lever for correct position.Set parking brake lever to ON position.Step 2.Check if brakes on rear dolly are caged.If brakes on rear dolly are caged, notify Unit Maintenance.3-13
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