36
Turn the key switch to “
” (OFF) to shut down
the engine and remove the key.
WARNING
Never leave the key in the key switch
when adjusting the tension of the tracks.
Someone may accidentally start the
engine without realizing it while adjusting
the tension of the tracks. Such accidents
could result in a serious injury.
To tighten the tension of the track
A grease fitting is located on the right and left
sides of the chassis frame. (Fig. 7‒10)
Supply grease to the grease cylinder through
the grease fitting to adjust the tension of the
track. Adjust the tension of the track so that
there is 160 ‒ 170 mm of slack between the
chassis frame and track shoe. (Fig. 7‒11)
M128R601
Fig. 7‒10
A − A
A
A
Track Roller
Chassis Frame
160 ‒ 170 mm
Track Link
Track Shoe
M179B92-1
Fig. 7‒11
To loosen the tension of the track
WARNING
Never loosen the nut more than one turn
as it may pop out resulting in serious
injury.
If the track is too tight, loosen the nut on the
grease fitting till the grease exudes (one turn
or less). After adjusting the track, fasten the nut
tightly.
Tightening torque: 59 ‒ 88 N･m (6.0 ‒ 9.0 kgf･m)
After adjusting one side, rotate the boom 180°
and adjust the other side in the same manner.
NOTICE
It is important to adjust the tension of left
and right tracks equally.
3‒2‒2 Adjustment Interval
Adjust the tension of the tracks at the following
time intervals.
Table 7‒3 Adjustment Interval
Interval
First time on new
machine
After 10 ‒ 20 hours
Thereafter
Every 800 hours or 6 months
NOTICE
Confirm the number of hours in service by
the hour meter.
