TM9-1803A.pdf

WAR DEPARTMENT TECHNICAL MANUAL

TM 9-1803A

ORDNANCE MAINTENANCE

Engine and Engine

Accessories

4x4 Truck

(Willys-Overland Model MB and Ford Model GPW)

WAR DEPARTMENT 24 FEBRUARY 1944

Forl/4-Ton

9-1803A

CONTENTS

Paragraphs

Pages

CHAPTER 1. I NTRODUCTION ,..,,,__......................

l- 2

4- 7

CHAPTER 2. E NGINE _.

3-24

8-64

S ECTION

I. Description and data . . . . . . 3- 4

II. Engine removal from vehicle .._..

8-14

III. Disassembly of engine into sub-

assemblies . . . . . . 6- 7

14-2 1

IV. Disassembly, cleaning, inspection,

repair, and assembly of sub-

assemblies _.

_. 8-17

21-43

V. Assembly of engine . . .._.. 18-19

43-57

VI. Installation of engine .,.,,., .._...... 20-21

57-61

VII. Fits and tolerances ,. ._. _. . 22-24

62-64

CHAPTER 3. C LUTCH ASSEMBLY _......,,,_.,.,..,,,___. 25-28

65-7 1

REFERENCES ....................................................................

72-74

INDEX ..................................................................................

TM 9.18Q3A

ORDNANCE MAINTENANCE - ENGINE AND ENGINE ACCESSORIES FOR ‘h-TON

4x4 TRUCK (WILLYS-OVERLAND MODEL MB AND FORD MODEL GPW)

CHAPTER 1

INTRODUCTION

Paragraph

Scope 1

MWO and major unit assembly replacement record ,,..__..,..._. 2

1. SCOPE.

a. The instructions contained in this manual are for the informa-

tion and guidance of personnel charged with the maintenance and

repair of the 4-cylinder engine used in the Willys MB and Ford GPW

?&ton 4 x 4 Trucks. These instructions are supplementary to field

and technical manuals prepared for the using arms. This manual

does not contain information which is intended primarily for the

using arms, since such information is available to ordnance mainte-

nance personnel in lOO-series TM’s or FM’s.

b. This manual contains a description of, and procedure for

inspection, removal, disassembly, repair, and rebuilding of the engine.

c. TM 9-803 contains information and guidance for the using

arms and first and second echelons.

d. TM 9-1803B contains information for removal, inspection, re-

pair, rebuild, assembly, and installation of the power train and chassis.

e. TM 9-1825B contains information for the maintenance of the

Auto-Lite electrical equipment used on this vehicle.

f. TM 9-1826A contains information for the maintenance of the

Carter carburetor used on this vehicle.

l3. TM 9-1827C contains information for the maintenance of the

Wagner hydraulic brake system used on this vehicle.

b. TM 9-1828A contains information for the maintenance of the

A. C. fuel pump used on this vehicle.

1. TM 9-1829A contains information for the maintenance of the

speedometer used on this vehicle.

5 This manual includes engine ordnance maintenance instruc-

tions from the following Quartermaster Corps lo-series technical man-

uals. Together with TM 9-803 and TM 9-1803B, this manual super-

sedes them :

(1) TM lo-1103,20 August 1941.

(2) TM lo-1207,20 August 1941.

(3) TM lo-1349,3 January 1942.

(4) TM In-1 G 12 Chanam 1 1ri Tamlay 1943.

A_.* _” _‘_‘, _ ___-_ D- ^, _- a----

TM 9-1803A

INTRODUCTION

Figure1- FrontViewofEngine

2. MWO AND MAJOR UNIT ASSEMBLY REPLACEMENT

RECORD.

a. Description. Every vehicle is supplied with a copy of AGO

Form No. 478 which provides a means of keeping a record of each

SJlWO (FSMWO) completed or major unit assembly replaced. This

form includes spaces for the vehicle name and U.S.A. registration

number, instructions for use, and information pertinent to the work

accomplished. It is very important that the form be used as directed,

and that it remain with the vehicle until the vehicle is removed from

service.

b. Instructions for Use. Personnel performing modifications or

major unit assembly replacements, must record clearly on the form a

9-1803A

OR0lNANCE MAINTENANCE - ENGINE AND ENGINE ACCESSORIES FOR ‘14.TON

4 1x4 TRUCK (WILLYS~OVERLAND MODEL MB AND FORD MODEL GPW)

Figure 2 - left Side View of Engine

Figure 3 - Right Side View of Engine

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