Figure 12-24.Aligning track roller frame with sprocket.
The center guiding guards or track roller guards are
available as attachments and are a continuation of the
hold the line safeguard so important to extending track
life. These center guards keep the track in line between
the rollers when operating in rocky, uneven, or
steep-sloped terrain, thereby reducing wear on the roller
flanges and track links.
When aligning the track roller frame with the
sprocket and adjusting the front idler, you must follow
the manufacturers procedures. The following
procedure is an example of what is involved in these
TRACK ROLLER FRAME
ALIGNMENT WITH SPROCKET
1. For the following example, refer to figure 12-24.
For the track to lead straight off of the rear roller (5) onto
the drive sprocket (8) and not rub against either the sides
of the sprocket or the rims of the track roller, the center
of the roller should be centered with the sprocket.
2. The drive sprocket (8) should be centered with
the rear roller (5) so the area (10) and (12) between the
Figure 12-25.Aligning idler with track rollers.
outer face of the sprocket and the inner edge of the track
roller rim are equal.
3. In the recess in the steering clutch case (15),
check the clearance of the diagonal brace (13) at points
(14) and (16).
4. To make this adjustment, remove the cap (1)
from the outer bearing assembly (4) and take off the lock
ring (7), nut (2), and retainer assembly (9).
5. To move the roller frame out, you add shims (3)
between the retainer assembly (9) and the holder
assembly (11). This will decrease the clearance (12) at
the roller and at the diagonal brace ( 14) and increase the
clearance at (10) and ( 16).
6. To move the roller frame closer to the tractor,
you remove shims (3). This decreases the clearance at
(10) and (16) and increases the clearance at (12) and
ADJUSTMENT OF THE
For the adjustment of the front idler, refer to
figure 12-25. To align the idler with the track rollers and
keep the clearance between the yoke and the plate within
specifications for dimension (B), you install shims (1)
and (3) between collars (2) and bearings (8).