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 834 of 987
TM 9-2320-285-24-1
2-72.
AIR HORN MAINTENANCE (CONT)
STEP
LOCATION
ITEM
ACTION
REMARKS
INSTALLATION
NOTE
Wrap threads of male fittings with Teflon tape before installation to
prevent leakage.
8
Cab under-
a.
Tubing (1)
Route
If removed from tractor
side air
b.
Elbow (17)
Install
In tee at air control valve
control
c.
Tubing (1)
Connect
To elbow (17); tighten elbow
valve
nut
d.
Two clamps
Install
(21) wash-
ers (20) and
locknuts (19)
e.
Two new tie
Install
straps (18)
9
Cab tilt
Cab
Lower
To normal operating position
pump
10
Cab roof
a.
Air horn assem-
Position
bly (22 thru
34) with new
gasket (16)
b.
Capscrew (15)
Install
lock washer
(14) and nut
(13)
c.
Head liner
Install
Reattach peeled head liner to
cab ceiling using adhesive
d.
Washer (12)
Install and
lock washer
tighten
(11) and nut
(10)
e.
Nipple (9)
Install
f.
Elbows (6 and
Install
In valve (8)
7)
g.
Elbow (6) with
Install
On nipple (9)
valve (8)
h.
Tubing (1)
Connect
To elbow (7); tighten elbow
nut
i.
Chain (4)
Install
In cab ceiling
washer (3)
and screw (2)
j.
Chain (4) and
Connect
To valve (8) lever
S-hook (5)
2-811
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