TM 5-5420-228-24
DETAILED TROUBLESHOOTING PROCEDURE
Symptom-6.1
LAUNCHER OPERATION HYDRAULICS
(Continued)
13
Check scissors dual counterbalance valve for
pressure setting of between 3350 to 3450 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 scissors dual
counterbalance valve T1 quick disconnect
fitting.
If STE/ICE is not available, connect adapter
hose to gage and adapter to scissors 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.
Lower scissors cylinder control lever.
Second Technician (Launcher Tongue)
Check if pressure gage or STE/ICE is between
3350 to 3450 psi.
Is pressure between 3350 to 3450 psi?
15
14
Replace scissors dual
Replace cartridge (C1) in
counterbalance valve (page 3-
NO
YES
scissors dual counterbalance
valve (page 3-204.64).