TM 5-5420-228-24
DETAILED TROUBLESHOOTING PROCEDURE
LAUNCHER OPERATION HYDRAULICS
(Continued)
Symptom-2.1
3
Check tongue hydraulic lines and fittings for
broken or missing parts.
First Technician (Operator's Station)
Shut engine off.
Move ball valve to "TRAVEL" position.
Cycle bridge launching control levers.
Second Technician (Launcher Tongue)
Remove pressure gage or STE/ICE from
tongue dual counterbalance valve T1 quick
disconnect fitting.
First Technician (Operator's Station)
Start engine.
Launch the bridge (TM-10).
Move ball valve to "LAUNCH" position.
Set engine speed at 1800 rpm.
Raise tongue cylinder control lever.
Second Technician (Launcher Tongue)
Visually check hydraulic lines and fittings for
TONGUE
leaks, crimping or other damage.
CYLINDER
Are hydraulic lines or fittings leaking or
damaged?
4
Identify leaking line by reference
on line with diagram (page 3-
Replace leaking line.
NO
YES
2-74.2
Change 3
