TM-9-2320-285-24-1

TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1

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

OCTOBER 1985

TM-9-2320-285-24-1 - Page 835 of 987

TM 9-2320-285-24-1

2-72.

AIR HORN MAINTENANCE (CONT)

STEP

LOCATION

ITEM

ACTION

REMARKS

INSTALLATION (cont)

11

Tractor

Air pressure

Restore

Para 2-41h(l)

ADJUSTMENT

12

Cab roof

a.

Two locknuts

Loosen if

(25)

necessary

b.

Air horn

Sound

Pull chain (4) down

c.

Two seat assem-

Adjust

Turn with screwdriver for

blies (26)

loudest sound

NOTE

Use screwdriver to prevent seat assemblies (26) from turning while

performing following step.

d.

Two locknuts

Tighten

Secures adjustment

(25)

2-812