TM 5-5420-228-24
DETAILED TROUBLESHOOTING PROCEDURE
LAUNCHER OPERATION HYDRAULICS
Symptom-5.1
(Continued)
5
Check tongue 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 Tongue)
If STE/ICE is available, proceed to test No. 51
(page 2-58.1) to test tongue dual
counterbalance valve T2 quick disconnect
fitting.
If STE/ICE is not available, connect adapter
hose to gage and adapter to tongue dual
counterbalance valve T2 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 Tongue)
Check if pressure gage or STE/ICE is between
3550 to 3650 psi.
Is pressure between 3550 to 3650 psi?
6
Replace cartridge (C2) in
tongue dual counterbalance
valve (page 3-204.64).
7
If still cannot be brought
Remove pressure gage
within tolerance, notify
assembly from T2.
NO
YES
support maintenance of
Replace tongue cylinder.
defective valve bank.
2-90.3/(2-90.4 blank)
