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)