TM-5-5420-228-24

LAUNCHER HYDRAULICS SYSTEM M48A5/M60A1 TANK CHASSIS, TRANSPORTING: FOR BRIDGE, ARMORED-VEHICLE-LAUNCHED; SCISSORING TYPE, CLASS 60

TECHNICAL MANUAL; ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT; MAINTENANCE MANUAL

AUGUST 1985

  TM-5-5420-228-24 - Page 178 of 750

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)


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