TM 5-5420-234-14&P
5-2. DIRECT SUPPORT TROUBLESHOOTING (continued).
3.
MAIN FRAME DOES NOT UNLOAD (continued).
2.
KNOWN INFO
TEST OPTIONS
Unit troubleshooting
Main Frame Unload
Are 3,1003,300 psi
completed.
Pressure Test.
present at the main
Other LHS functions OK.
hydraulic block assem-
REASON FOR QUESTION
bly, test port TPMB?
POSSIBLE PROBLEMS
If the correct hydraulic
Directional control valve
pressure is measured at
faulty.
test port TPMB, the
Main frame counter-
control portion of the
balance valve(s) faulty.
hydraulic circuit is OK.
Replace directional
control valve (para
NO
YES
5-18
