TM 5-5420-234-14&P
5-2. DIRECT SUPPORT TROUBLESHOOTING (continued).
4.
MAIN FRAME DOES NOT LOAD (continued).
2.
KNOWN INFO
TEST OPTIONS
Main Frame Load
Unit troubleshooting
Are 3,1003,300 psi
Pressure Test.
completed.
present at the main
Other LHS functions OK.
hydraulic block assem-
REASON FOR QUESTION
bly, test port TPMA?
POSSIBLE PROBLEMS
If the correct hydraulic
pressure is measured at
Directional control valve
test port TPMA, the
faulty.
control portion of the
Main frame counter-
hydraulic circuit is OK.
balance valve(s) faulty.
Replace directional
control valve (para
NO
YES
5-24
