TM-9-2320-272-24-4

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 4 OF 4

JUNE 1998

TM-9-2320-272-24-4 - Page 106 of 836

TM 9-2320-272-24-4

5-16. THROTTLE COVER AND SHAFT MAINTENANCE (Contd)

c. Assembly

1.

2.

3.

4.

5.

6.

7.

8.

9.

NOTE

Governor weight must be installed before assembling throttle

shaft cover (para. 5-17).

Install new O-ring (11) and valve plug (12) in fuel pump housing (1).

Install fuel-adjusting screw (17), new O-rings (13) and (16), throttle stop control (14) and two

setscrews (15) on throttle shaft (9).

Install new throttle shaft ball (18) in end of throttle shaft (9).

Install throttle shaft (9) in fuel pump housing (1) with retaining ring (10).

NOTE

l

Do not install throttle shaft cover until fuel pump has been

calibrated (para. 5-18).

l

Do not perform steps 5 through 7 unless pin holes are damaged

beyond use.

Position throttle shaft cover (2) on fuel pump housing (1).

CAUTION

Use care when drilling new holes for drive pins. The pump

housing is made of cast aluminum and is easily damaged. Do not

allow metal particles to enter pump housing.

Center punch location of new holes on throttle shaft cover (2). Ensure holes are opposite one

another.

Carefully drill through throttle shaft cover (2) and into throttle shaft cover flange with 1/15 in. drill

bit NO MORE than 1/4 in. (6 mm).

Install throttle shaft cover (2) on fuel pump housing (1) by gently tapping two new drive pins (8)

through throttle shaft cover (2) into holes.

Install throttle lever (3) on throttle shaft (9) with screw (7), washer (6), new lockwasher (5), and

nut (4).

5-100