nifty TrackDrive TD120T Series Operating/Safety Instructions Manual page 23

4.1.3 MANOEUVRING
Once the engine is running, the operator can manoeuvre the machine from the platform. On entering
the platform and selecting 'drive' on the duty selector switch, the operator can now reach forward and
grasp the two drive handles to enable the drive function. Depressing the platform mounted footswitch
will energise the drive dump solenoids, at the same time bringing the diesel engine to full revs, if
selected. If the levers are moved forwards or backwards, the twin tracks will drive the machine in the
desired direction. If the levers are moved in opposition, the machine will turn. The control function of
each handle 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.
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
and manoeuvre the machine whilst adjacent to the right hand track. 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 platform mounted
footswitch, 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 60% (31 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. Again, release the
levers, stabilise the machine and start driving again. Avoid sudden changes of drive lever position; a
smooth driving action is much preferred.
English/USA – 02/17
TrackDrive (TD) Series
Operating & Safety Instructions
It is
21