M A E D A Mini-Crawler Crane Section 5 – GENERAL MACHINE MAINTENANSE
3/2019 MC305C-3 5-65
Tension Check
1. Move the left and right crawlers so that the
junction of the rubber track (indicated by M)
comes to the top centre between the axles.
Fig. 5-131
2. See "OUTRIGGER SETTING" on page 4-36
to set the outriggers and raise the crawlers for
about 50 mm from the ground.
3. Measure the clearance between the wheel
tread of the track roller at centre and the
shoulder of the rubber track.
NOTICE: The clearance of 5 to 10 mm indicates
the standard tension.
Fig. 5-132
4. If the tension is out of the standard range, see
"Tension Adjustment" on page 5-65 to make
adjustments.
Tension Adjustment
If the "tension check" of the rubber track found the
tension lower than standard tension of the rubber
track, make adjustments as described below.
Working with the loose rubber track (the tension of
the rubber track at 15 mm or more) will cause
run-off or early wear of the core metal.
• Loose Tension (Increase Tension)
Have a grease gun (pump) ready.
1. Inject the grease from the grease valve (1)
using the grease gun.
Fig. 5-133
2. Perform the following tasks to verify the
proper tension.
(1) See "OUTRIGGER STOWING" on page
4-45 to stow the outriggers and lower the
machine on the ground.
(2) Move the machine forward/backward.
(3) See "OUTRIGGER SETTING" on page
4-36 to set the outriggers and raise the
crawlers again for about 50 mm from the
ground.
3. Perform the "tension check" of the rubber
track again.
If the tension is not appropriate, make
another adjustment.
4. See "OUTRIGGER STOWING" on page 4-45
to stow the outriggers and lower the machine
on the ground.
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