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Section III - OPERATIONAL FUNCTIONS
3.3 The Control Handles are clearly marked as to their functions and
directions. Movement of the control handles meters the flow of oil
through valves to control the speed of each function.
3.4 The Vernier Throttle Control, located at the left control station, is
used to vary the speed of the truck engine to govern the maximum
speed of the winches and cylinders. See Figure 3.3.
3.5 The Wrecker Boom is extended and elevated by means of double
acting cylinders. The boom can be elevated or extended under
either "LOAD" or "NO-LOAD" conditions.
3.6 The self-locking, worm-driven winch is powered by its own hydraulic
motor attached directly to the winch input shaft. See Figure 3.4.
WRECKER (cont'd)
FIGURE 3.3
FIGURE 3.4
III-2
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