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 171 of 750

TM 5-5420-228-24

DETAILED TROUBLESHOOTING PROCEDURE

LAUNCHER OPERATION – HYDRAULICS

(Continued)

Symptom-6.1

First Technician (Operator's Station)

x

Shut engine off.

x

Move ball valve to “TRAVEL” position.

x

Cycle bridge launching control levers.

Second Technician (Launcher Tongue)

x

If STE/ICE is available, proceed to test No. 51

(page 2-58.1) to test scissors dual

counterbalance valve T1 quick disconnect

fitting.

x

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)

x

Start engine.

x

Move ball valve to “LAUNCH” position.

x

Set engine speed at 1800 rpm.

x

Lower scissors cylinder control lever.

Second Technician (Launcher Tongue)

x

Check if pressure gage or STE/ICE is between

3350 to 3450 psi.

Check scissors dual counterbalance valve for

pressure setting of between 3350 to 3450 psi.

Is pressure between 3350 to 3450 psi?

13

x

Replace cartridge (C1) in

scissors dual counterbalance

valve (page 3-204.64).

x

Replace scissors dual

counterbalance valve (page 3-

204.32).

14

15

NO

YES

2-96.8

Change 3