SUBSECTION 9A
P R O P E L SYSTEM
GENERAL
motors. One motor is provided for each side of the machine.
The torque converter is controlled by an electronic anti-stall
This section covers the mechanical and hydraulic compo-
control system which automatically prevents engine stal-
nents that are used to propel the machine. Crawler side
ling while propelling.
frame and axle removal and installation procedures are also
included in this section information pertaining to the propel
anti-stall control system is located in Section X.
The propel motors are mounted on reduction gear cases at
The propel system consists of the propel transmission,
the rear of the crawler side frames. A spring set holding
propel brake, propel gear case and the crawler compo-
brake is located between the output shaft of the motor and
nents as shown in Figure 9A-1
the input of the gear case. Rotation of the gear case output
DESCRIPTION
shaft drives the crawler track drive sprocket The crawler
The propel transmission consists of two engine driven vari-
idler sprocket is located at the front of the machine and is
able displacement pumps and two fixed displacement
adjustable to compensate for crawler track wear.
Figure 9A-1. Propel System Components