TM-9-2320-285-24-2

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-9-2320-285-24-2 - Page 423 of 698

TM 9-2320-285-24-2

3-42.

FIFTH WHEEL HYDRAULIC SYSTEM MAINTENANCE (CONT)

a. Hydraulic Pump (cont).

STEP

LOCATION

ITEM

ACTION

REMARKS

DISASSEMBLY (cont)

2

Hydraulic

a.

Key (1)

Remove and

pump

discard

b.

Four socket

Remove

Discard washers (3)

head screws

(2) and

washers (3)

c.

Four socket

Remove

Discard washers (5)

head screws

(4) and

washers (5)

CAUTION

Do not attempt to pry pump sections apart in following step. Prying could scratch mating surfaces and cause a leak.

d.

Pump body (6)

a. Tap

Use soft plastic hammer;

lightly

tap lightly to loosen

b. Remove

e.

Wear plate (7)

Remove and

and sealing

discard

ring (8)

f.

Load seal (9)

Remove and

and preload

discard

seal (10)

g.

Idler gear (11)

Remove

h.

Drive gear (12)

Remove

NOTE

Remove two dowel pins (13) only if inspection indicates need for replacement.

i.

Two dowel pins

Remove

(13)

NOTE

Remove bearings (15 and 16) only if inspection indicates need for replacement.

3-417