nifty TrackDrive TD150T Series Operating/Safety Instructions Manual page 22

TrackDrive (TD) Series
Operating & Safety Instructions
4.1.3 MANOEUVRING
Once the engine is running, the operator can manoeuvre the machine from the platform. On entering
the platform, the operator can now turn the selector to the right to enable the drive function. Pressing
the green power button will energise the drive dump solenoids, at the same time bringing the diesel
engine to full revs, if selected. If the drive paddles (or joystick, if fitted) are moved up or down, the twin
tracks will drive the machine in the desired direction. If the paddles are moved in opposition, the
machine will turn. The control function of each control is fully proportional, in as much as the final
speed will be dependant on how far the lever is moved. Two drive speeds are available, one being a
'fast' tick over and the other high throttle. This function is selectable from within the platform, but is
also limited by the tilt transducer, such that high travel speeds become unavailable when excessive
working angles are encountered. It is recommended that all ramp angles are approached at minimum
revs, allowing the machine to climb at the best speed for controllability.
To halt the drive function, release either the Drive handles or the footswitch. The drive motors feature
automatic braking for load holding on un-level ground, as well as flow control devices to prevent over-
speed when driving down gradients.
If difficult terrain is to be tackled, the operator can walk alongside the machine in 'Pedestrian' mode (if
fitted) and manoeuvre the machine whilst adjacent to the machine, simply by de-mounting the control
panel. Two-travel speeds are available, the 'fast' mode being controlled by the on-board tilt transducer,
which denies the use of high throttle when on an excessive slope. The Operator also has control of
when high throttle is used, permitting the creep speed to remain under control. The drive system
works from the panel mounted green button, controlling both the engine speed and the drive pump
dump valve, for increased safety.
4.1.4 RAMPS AND INCLINES
The ability of the Track Drive machine to ascend and descend slopes of up to 45% (24 degrees)
introduces a new level of complexity to the use and operation of the machine. The operator must now
be additionally responsible for assessing the suitability of the terrain to be tackled. Although within the
capabilities of the machine, some areas would be undesirable for access, and present a real danger to
the operators themselves or other people around at the time. In order to ascend a slope safely, it is
best if the incline is approached 'square-on' to the angle, in order to maximise the grip and ensure an
even drive effort by both tracks. The operator can quickly judge the maximum permitted angle by
comparing the maximum angle of the slope to the front angled plate on the machine. If the slope is
steeper than the approach plate, then the angle is outside the capability of the machine. Under no
circumstances should an excessive slope be attempted.
When driving up a slope, it is recommended that the machine drive forwards, when driving down a
slope, again drive forwards down it. The operator should be aware of the response of the machine
when reaching or departing the top of a slope. The machine will climb, or descend until the balance of
the tracks places more of the weight beyond the point of contact with the ramp and the tracks. The
machine will then topple forwards or backwards to meet the next level. If the operator is in the
platform, this sudden change of level will cause a fast angular movement, which they will have to
counteract. Ensure a firm grip is taken of the platform handrail, keep the legs loose and do not lock the
knees, and release the drive joystick as the machine changes level. If the drive speed becomes erratic
at any time, this can be due to operator-induced oscillations on the drive levers. In this case, release
the levers, stabilise the machine and start driving again. Avoid sudden changes of drive lever position;
a smooth driving action is much preferred.
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English/USA 12/09
Courtesy of Crane.Market