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)