Change 3
2-100.3/(2-100.4 blank)
TM 5-5420-228-24
Symptom-7.1
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.
Check overhead dual counterbalance valve for
pressure setting of between 3550 to 3650 psi.
Is pressure between 3550 to 3650 psi?
5
•
Replace cartridge (C1) in
overhead dual
counterbalance valve (page
3-204.64).
•
If still cannot be brought
within tolerance, notify
support maintenance of
defective valve bank.
•
System is operational.
•
Perform launch and retrieve
procedures (TM-10).
6
7
NO
YES
DETAILED TROUBLESHOOTING PROCEDURE
LAUNCHER OPERATION – HYDRAULICS
(Continued)