TM-9-2320-279-10-2
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
OPERATOR’S MANUAL VOLUME 2 OF 2
DECEMBER 1998
CHANGE 3
TM-9-2320-279-10-2 - Page 33 of 819
TM 9-2320-279-10-2
Vehicle Operation Systems (Cont)
1-35. POWER STEERING HYDRAULIC SYSTEM.
Figure 1-26 shows how
power is supplied to the main steering gear (1) by an engine driven
steering/tensioner pump (2). The fluid reservoir (3) is shared with the main
hydraulic system. The steering wheel (4) is mechanically linked to the main
steering gear. The steering wheel rotates a gear that positions a spool in the main
steering gear. This motion is hydraulically sent to a piston in the slave gear (5)
causing it to follow the rotation of the main steering gear. The main gear pitman
arm (6) is mechanically connected to the slave gear pitman arm (7). These pitman
arms move the steering mechanism on the front axles (8) left or right causing the
vehicle to steer left or right.
Figure 1-26. Power Steering Hydraulic System Components Location.
1-18
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