5.5
RUBBER TRACK MAINTENANCE
5.5.1 Checking track tension
Stop the machine on a solid and flat surface. Lift machine in safe conditions and put
stable blocks under the crawler frame to support it. In correspondence to the central
roller of the crawler, measure distance A from the roller bottom to the rubber track
rigid inner part. The track tension is correct when measurement A is between 10
and 15 mm.
If the track tension is not within the above mentioned measurements, or too loose
or too tight, follow the instructions given in the following paragraph.
5.5.2 Operations to loosen or tighten track
The grease contained in the hydraulic track is under pressure. Therefore never
loosen greasing valve 1 for one than one turn. If the valve is too loose, it might get
expelled under the grease pressure, exposing the operator to risk. Never loosen
grease nipple 2.
Remove any mud of gravel jammed between the sprocket and the track links before
loosening them.
1. Remove screws and cover plate 3 to have access to regulation
2. To loosen track, slowly unscrew valve 1 anti clockwise for no more than one
turn. One turn of valve 1 is sufficient to loosen track.
3. If the grease does not start draining, make the track turn slowly.
4. Once the right tension is obtained, turn valve 1 clockwise and then tighten it.
Clean any grease leaks.
5. To stretch a track, put a grease gun inside grease nipple 2 and add grease until
the track deflection is within specifications.
39
M
M
M
M
A
A
A
A
N
N
N
N
U
U
U
U
A
A
A
A
L
L
L
L
U
U
U
U
S
S
S
S
E
E
E
E
A
A
A
A
N
N
N
N
D
D
D
D
M
M
M
M
A
A
A
A
II
II
N
N
N
N
T
T
T
T
E
E
E
E
N
N
N
N
A
A
A
A
N
N
N
N
C
C
C
C
E
E
E
E
M
INIDUMPER MODEL
HP 1100
A
