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2.8.4 Track roller must be replaced if the value of t is less than 3mm as per figure 2.14 below.
Normally, a track roller and a bushing wear at the same rate and the replacement must
be made simultaneously. Do not let until the rollers are completely wear and the track
link contact with the pontoon body.
Figure 2.14
2.9
Pontoon
Pontoons provide sufficient buoyancy force to float the whole machine on open water.
Sometimes, the leaks may happen at welding joints especially after the pontoons have been
exposed to extreme environment for long period. Water leaks inspection must be made for
every 500 hours in order to keep pontoons safe for operation. In other case, inspection must be
made immediately if the machine is tipped abnormally to one side during operating on open
water.
2.9.1 Each pontoon provides man holes at the side wall for maintenance purpose (as per
figure 2.15 on next page).
“Track rollers, pins and bushings life are vary substantially with different travel frequencies and
medium of operation. All these parts are very fast to get wear when the machine is operated at
sandy or muddy area.
“Wearing rate of tracks rollers, pin and bushings does not directly proportional with machine
working hours. A machine that use 2 hours just to travel to work site is facing with faster
wearing rate of track rollers, pins and bushing compare to a machine that use 2 hours to load or
unload earth from a lorry in static condition”.
“All shown maintenance frequencies for track rollers, pins and bushings are for suggestion and
reference only and actual practice could be different”.
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