TM 5-5420-228-24
DETAILED TROUBLESHOOTING PROCEDURE
LAUNCHER OPERATION HYDRAULICS
Symptom-3.1
(Continued)
WARNING
Always connect transducer or gage to
adapter hose before connecting to test
quick disconnect. System pressure is
released into hose at time of connection.
The hydraulic fluid can be hot and harm
your eyes, nose and ears, along with
making a mess.
13
Check scissors dual counterbalance valve for
TEST PORT
pressure setting of between 3350 to 3450 psi.
T2
First Technician (Operator's Station)
Shut engine off.
Move ball valve to "TRAVEL" position.
Cycle bridge launching control levers.
Second Technician (Top Deck)
If STE/ICE is available, proceed to test No. 51
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)
TEST PORT
T1
Start engine.
Move ball valve to "LAUNCH" position.
Set engine speed at 1800 rpm.
Raise scissors cylinder control lever.
Second Technician (Overhead Cylinder)
Check if pressure gage or STE/ICE is between
3350 to 3450 psi.
Is pressure between 3350 to 3450 psi?
14
15
Replace cartridge (C1) in
Replace scissors dual
scissors dual counterbalance
NO
YES