SECTION 3 - CHASSIS & TURNTABLE
3121784
3-3
e.
The damage indicated in paragraphs a, b,
and c above, must not be considered fatal
for the track and, even if in presence of grad-
ual and progressive damage, they allow the
track to continue working. The develop-
ment of the damage indicated in point 3
leads to the exposure of the metal cores and
if they are exposed for more than half of the
track circumference, it means that it is time
to replace them. It can however still be used.
5.
Cracks due to external factors
Cracks on external track surfaces (those in con-
tact with the ground) are often due to contact
with gravel, sharp stones, sharp materials, nails,
glass, which cause cuts. From the rubber proper-
ties point of view, this is inevitable although it
does depend on service conditions. Cracks on
the internal surface of the circumference and on
the edge of the rubber originate from contact of
the belt with the structure of the undercarriage
or with sharp concrete edges. The increase in
cracks is relatively small. Even if it does not
appear to be in good condition the track can be
used in heavy duty conditions.
Replacing The Rubber Tracks
DANGER
THE GREASE CONTAINED IN THE HYDRAULIC TRACK IS PRESSURISED.
FOR THIS REASON, DO NOT LOOSEN THE GREASING VALVE (1) BY
MORE THAN 1 TURN; IF THE VALVE IS LOOSENED TOO MUCH, IT RISKS
BEING EXPELLED UNDER THE EFFECT OF THE PRESSURE OF THE
GREASE, PUTTING THE SAFETY OF THE OPERATOR AT RISK. NEVER
LOOSEN GREASER (2).
When gravel or mud are blocked between the toothed
wheel and the track links, remove it before loosening.
Removing The Rubber Track
1.
Stop the machine on solid, level land, lift it and
support it in safe conditions, using the outrig-
gers.
Figure 3-6.
2.
Remove the screws and take of adjustment
access lid 3.
3.
To loosen the track, slowly unscrew valve 1 in an
anti-clockwise direction for no more than one
turn. One turn of valve 1 is sufficient to loosen
the track.
4.
If the grease does not start to drain, turn the
track slowly.
5.
Insert three steel pipes (4) inside the track in the
space between the rollers. Turn the driving
wheel backwards (5) in a way that the steel pipes
proceed with the track and engage on the track-
tensioning wheel. Apply force (6) laterally to
allow the track to run and lift it from the track-
tensioning wheel.
Figure 3-7.
Installing The Rubber Track
DANGER
ENSURE SAFE CONDITIONS WITH THE MACHINE LIFTED TO PROCEED
WITH MOUNTING THE TRACKS.
1.
Check that the grease contained in the hydraulic
cylinder has been removed.
2.
Engage the track links with the toothed wheel
and position the other end of the track on the
track-tensioning wheel.
3.
Turn the driving wheel in reverse (7) pushing the
track plate inside the frame (8).
4.
Position the track using a steel pipe and turn the
driving wheel again.
5.
Ensure that the track links are correctly engaged
in the toothed wheel and in the track-tensioning
wheel.
6.
Adjust track tension (see paragraph -Operations
for loosening/tightening the track).
7.
Rest the tracked under-carriage on the ground.
4
5
6
5202
02B
H19
Go
to
Discount-Equipment.com
to
order
your
parts
