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 123 of 750

2-74.2

Change 3

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

leaks, crimping or other damage.

NO

YES

TM 5-5420-228-24

DETAILED TROUBLESHOOTING PROCEDURE

LAUNCHER OPERATION – HYDRAULICS

(Continued)

Check tongue hydraulic lines and fittings for

broken or missing parts.

3

•

Identify leaking line by reference

on line with diagram (page 3-

67).

•

Replace leaking line.

Symptom-2.1

4

TONGUE

CYLINDER

Are hydraulic lines or fittings leaking or

damaged?