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)
