TM 9-2320-273-20
2-1. OVERVIEW (Continued).
You can find other basic information about the M915, M916, and M920 Truck Tractors and Chassis
for the M917, M918, and M919 in:
a.
Chapter 5, section II (Circuit Descriptions).
b.
Appendix D (Schematic Diagrams).
c.
TM 9-2320-273-10 (Operating Instructions for the M915, M916, and M920 Truck
Tractors and Chassis for the M917, M918, and M919).
Section I TRUCK/TRACTOR CHASSIS
Following is a description of the basic chassis and cab and illustrations of the power train. You will
find detailed descriptions of the major components shown in subsequent sections in this chapter.
2-3. BASIC CHASSIS AND CAB.
The basic chassis and cab for all M915 thru M920 vehicles is the Crane Carrier Corporation Centaur
Model T3824. Three frame types are used, each designated by its corresponding chassis.
a.
b.
c.
d.
e.
f.
Type I
for ModeI M915 (6 x 4 tractor).
Type II for Model M916 (6 x 6 tractor).
Type II for Model M918 (6 x 6 bituminous distributor).
Type Ill for Model M917 (8 x 6 dump truck).
Type Ill for Model M919 (8 x 6 Concrete-Mobile® mixer).
Type III for Model M920 (8 x 6 tractor).
The same basic frame is used for each type design. Type II and Type III frames differ from Type I
frame by the addition of a 3/8-inch outer channel. The designations given above (6 x 4, 6 x 6 and
8 x 6) refer to the number of wheel positions on the vehicle (first digit) and number of drive wheel
positions (second digit). For example: 6 x 4 indicates six wheel positions (inside wheels on rear
axles are not counted), and four driving wheel positions.
2-2
2-2. INTRODUCTION.
