effect causes the idler to maintain the desired tension
regardless of operating conditions.
The recoil spring is a large coil spring placed in the
track frame in a way that enables the spring to absorb
shock from the front idler. The spring is compressed
before installation and held in place by stops or
spacers. The track adjusting mechanism, by pressing
against the spring stop, maintains the desired tension
on the track assembly by holding the idler and yoke in a
FORWARD position. The operation of the recoil
springs depends on the amount oftension on the track.
tractors have manual adjustments, whereas newer
tractors are adjusted hydraulically with a grease gun.
Grease is pumped into the yoke cylinder and extends it
until enough tension is placed on the recoil spring to
remove the slack from the track. Tension is released by
loosening the vent screw located next to the adjustment
DO NOT lubricate the adjustment fitting
when performing maintenance on the tractor.
Track Guiding Guards
The adjusting mechanism must be extended
enough to remove slack between the front idler and
spring. This adjustment may be made by either manual
(fig. 6-26) or hydraulic (fig. 6-27) means. Many older
Accumulation of rock and dirt packed in the track
causes the tracks to tighten, resulting in additional
wear and stress on track components. The use of track
guiding guards minimizes these sources of possible
depreciation. Another function of the track guiding
guards is maintaining proper track alignment; this is
considered secondary, but actually is the most
Figure 6-26.Manual track adjustment.
Figure 6-27.Hydraulic track adjuster.
Guiding guards should be repaired when damaged,
since a damaged guard is worthless as far as protection
for track components or assisting in maintaining track
alignment. When installing new tracks on a piece of
equipment, check the condition of the guards. These
guards should be in a condition to guide the track
squarely into alignment with the rollers properly. The
three guards are as follows:
The FRONT GUIDING GUARDS receive the
track from the idler and hold it in line for the first
roller. The front roller then can fully be utilized
for its intended purposecarrying its share of
the load without having to climb the side of an
improperly aligned track.
The REAR GUIDING GUARDS hold the track
in correct alignment with the driving sprocket,
permitting a smooth even power flow from the
sprocket to the track. With proper alignment,
gouging of the track link and sprocket teeth is
The CENTER GUIDING GUARDS or track
roller guards are available as attachments. These
center guards keep the track in line between the
rollers when operating in rocky, steep, or uneven
terrain. The center guards reduce the wear on
roller flanges and track links.