TABLE 5-1. DIRECT AND GENERAL SUPPORT TROUBLESHOOTING (Cont'd)
TEST OR INSPECTION
Release pressure from air receiver and compressor pump before inspection,
performing procedures or disassembly of equipment to avoid personal injury.
Check to see that compressor pump can be turned by hand.
If compressor pump cannot be turned by hand, it may be
due to back pressure leaking through check valve from
air receiver. Remove and replace check valve.