TM-5-2350-377-13-P
ARMORED COMBAT EARTHMOVER (ACE), M9
TECHNICAL MANUAL; OPERATOR AND FIELD MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST SUPPORTING THE HYDRAULIC BLADE FOLDER-TRACK TENSIONER
JUNE 2012
TM-5-2350-377-13-P - Page 43 of 404
OPERATOR MAINTENANCE
THEORY OF OPERATION
SCOPE
This section contains information relative to the principles of operation for the M9 ACE with Hydraulic Blade Folder
and Track Tensioner (HBF-TT). The general functional description of the vehicle and the HBF-TT system is contained
in this section. Maintenance personnel should be familiar with the principles of operation of these systems before
working on or troubleshooting this system. A more thorough understanding of the hydraulic system and electrical
system can be obtained by referring to TM 5-2350-262-20, Vehicle Wiring Diagram and TM 5-2350-262-20, Vehicle
Hydraulic Schematic.
SUSPENSION SYSTEM
The suspension system consists of tracks, roadwheels, arms, drive sprockets, rotary actuators, and bump stops.
The suspension system components used in the HBF-TT system are described below.
TRACK ADJUSTING CYLINDERS
The track adjusting cylinders (Figure 1) control the track tension. The track adjusting cylinders (Figure 1) can be
controlled by a control lever in the operator's compartment.
TRACK ADJUSTING
CYLINDER
G0004HBF
ADJUSTING FLANGE
Figure 1.
Track Adjusting Cylinders.
TM 5-2350-377-13&P
0003
0003-1
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