TM 5-5420-228-24
DETAILED TROUBLESHOOTING PROCEDURE
LAUNCHER OPERATION HYDRAULICS
Symptom-7.1
(Continued)
5
Check overhead dual counterbalance valve for
pressure setting of between 3550 to 3650 psi.
First Technician (Operator's Station)
Shut engine off.
Move ball valve to "TRAVEL" position.
Cycle bridge launching control levers.
Second Technician (Launcher)
If STE/ICE is available, proceed to test No. 51
(page 2-58.1) to test overhead dual
counterbalance valve T1 quick disconnect
fitting.
If STE/ICE is not available, connect adapter
hose to gage and adapter to overhead dual
counterbalance valve T1 quick disconnect
fitting.
First Technician (Operator's Station)
Start engine.
Move ball valve to "LAUNCH" position.
Set engine speed at 1800 rpm.
Raise tongue cylinder control lever.
Second Technician (Launcher)
Check if pressure gage or STE/ICE is between
3550 to 3650 psi.
Is pressure between 3550 to 3650 psi?
6
Replace cartridge (C1) in
overhead dual
counterbalance valve (page
7
If still cannot be brought
System is operational.
NO
YES
within tolerance, notify
Perform launch and retrieve
support maintenance of
procedures (TM-10).
defective valve bank.
2-100.3/(2-100.4 blank)