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 112 of 750

Change 3

2-68.3

First Technician (Operator's Station)

x

Ensure ball valve is in “TRAVEL” position.

x

Stop engine.

Both Technicians (Outside Vehicle)

x

Have bridge removed from launcher TM 5-

5420-203-14

Second Technician (Operator's Station)

x

Start engine.

x

Move ball valve to “LAUNCH” position.

x

Set engine speed at 1800 rpm.

x

Raise tongue cylinder control lever until tongue

cylinder is fully extended.

x

Move ball valve to “TRAVEL” position.

x

Stop engine.

x

Depress overhead cylinder control lever and

allow tongue to lower slowly to ground.

Both Technicians (Overhead Cylinder)

x

Remove overhead cylinder armor (page 3-

223).

First Technician (Overhead Cylinder)

x

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

(page 2-58.1) to test overhead dual

counterbalance valve T2 quick disconnect.

x

If STE/ICE is not available, connect adapter

hose to gage and adapter to overhead dual

counterbalance valve T2 quick disconnect

fitting.

Second Technician (Operator's Station)

x

Start engine.

x

Move ball valve to “LAUNCH” position.

x

Set engine speed at 1800 rpm.

x

Raise overhead cylinder control lever for five

minutes.

First Technician (Overhead Cylinder)

x

Check if pressure gage or STE/ICE is between

3550 to 3650 psi.

Check overhead dual counterbalance valve for

pressure setting between 3550 to 3650 psi.

Is pressure between 3550 to 3650 psi.

5

YES

NO

TM 5-5420-228-24

DETAILED TROUBLESHOOTING PROCEDURE

LAUNCHER OPERATION – HYDRAULICS

(Continued)

Symptom-1.1

x

Go to step 10.

6