TM 9-2320-279-34-1Troubleshooting Malfunctions (Cont)2-7. TROUBLESHOOTING INSTRUCTIONS (CONT).Table 2-3. Troubleshooting (Cont)MalfunctionTest or InspectionCorrective ActionMATERIAL HANDLING CRANE (M977, M985, M984E1) (CONT)1.CRANE WILL NOT OPERATE MANUALLY OR WITH REMOTE CONTROL (CONT).Step 2. Check that shut-down solenoid valve operates. Set ENGINE and PTO ENGAGE switches toON. Move crane POWER switch ON and OFF several times. Listen for clicking sound ofsolenoid to tell if solenoid operates.If solenoid clicks but crane will not operate, try to operate crane using emergencyprocedures (TM 9-2320-279-10).If crane operates, replace defective shut-down solenoid valve (para 17-32 for M977and M985), (para 17-32.1 for 11984E1).If crane does not operate (M977 and M985). refer to Hydraulic SystemTroubleshooting.If crane does not operate (M984E1). refer to Step 4.2-82
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