Gradall G660 Operator's Manual page 22

CRAWLER MOUNTED UNITS
Use Your Crawler Properly
Crawler undercarriages are furnished to enable the
Gradall to travel over rough terrain and reach work
sites which would not be accessible to the ordinary
truck mounted Gradall.
1. Travel in forward direction whenever possible
(with track drive motors at rear). Traveling in
reverse increases wear on sprockets.
2. Plan your work to equalize left and right turns.
Constantly turning in one direction will cause track
components to wear unevenly.
3. Apply power to both tracks when turning. When
power is applied to only one track it becomes nec-
essary for the driving track to overcome the drag of
the other track.
4. Hard digging in one spot can cause as much track
wear as frequent moves. Do not neglect service to
tracks and sprockets because of infrequent moves.
5. Rough operation and operation on uneven ground
can cause unnecessary wear and damage to track
components. Reasonable operation and regular
maintenance will extend track life significantly.
Crawler Controls
TRACK DRIVE LEVERS: The track drive levers
permit independent control of each track. Each track
brake is automatically set when its track drive lever is
returned to neutral. Use of track controls is illustrated
on the following page.
6. Mud and debris can prevent rollers from turning
and cause flat spots. Clean track components as
often as necessary.
7. Never park crawler units on a steep incline or on the
side of a hill. This can distort roller seals and cause
a loss of lubricant which could ruin the rollers.
8. Use boom tie down (shown below) when trans-
porting. Secure boom to tie down using hardware
provided.
SPEED CONTROLS: Your crawler is equipped
with floor mounted speed controls located near the
operator's left foot.
HIGH SPEED — Depress right selector.
LOW SPEED — Depress left selector (for
maximum traction and
maneuverability in tight
quarters).
These speed changes can be made while machine is in
motion or stationary.
VARIABLE FLOW CONTROL (see page 6): For
units equipped for variable hydraulic flow, use HIGH
or LOW for crawler operation. Unit may not crawl
straight in AUTOMATIC mode. Always use LOW for
greater control when loading or unloading the unit.
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continued . . .