LeeBoy 8520C - Idler and Track Tension Cylinder Replacement; Front Idler Replacement Procedure; Track Tension Cylinder Replacement

5-38 LeeBoy 8520C Conveyor Paver
Maintenance
Front IdlerFront Idler
Follow this procedure for replacing the front idler
(Figure 5-46):
1. Raise conveyor and insert safety prop. (Pages 5-6
and 5-6)
2. Locate track tension manifold and back the relief
cartridge out of the aluminum block about three
turns until you hear the tension pressure release.
(Page 5-50)
NOTE: Perform this additional step for poly or steel
tracks only: Rotate the track so the master
pin is at the rear bottom of the front idler and
back up the paver until the track clears the
front idler.
3. Jack up the paver at least two feet off the ground
for enough clearance under the undercarriage
to perform this procedure and stabilize with jack
stands or safety blocks.
Crush hazard! Always use safety
blocks or jack stands when working under the paver
to prevent serious injury or even death.
4. Remove the clevis pin from the cylinder rod and
idler bracket. Idler will slide out.
Clevis Pin
Front Idler
Clevis Pin
Front Idler
Figure 5-46. Remove Clevis Pin to Release Front
Idler
5. Remove the idler bracket and bolt to the new idler.
6. Install new idler, ensuring cylinder and clevis pin are
aligned properly.
7. Lower sprocket back down toward the track chain,
ensuring the sprocket is about one (1) inch from the
chain.
Perform these additional steps for poly or steel
tracks only:
8. Check that the track chain is full seated with the
drive sprocket and rollers are aligned with chain
center.
9. Tighten the tension relief.
10. Lower paver to ground, remove jack and start
machine. Track tensions will automatically adjust
when the machine is started.
11. Ensure the track chain remains fully seated with the
drive sprocket and rollers still aligned with the chain
center.
Track Tension CylinderTrack Tension Cylinder
1. Follow Steps 1 - 4 in the previous section. The track
tension cylinder is located behind the front idler.
(Figure 5-45 on Page 5-37)
2. Pull the track tension cylinder toward the front to
remove the hose from the bottom of the cylinder.
3. Repack the seal kit or replace cylinder if worn, and
reinstall.
4. Install idler, ensuring cylinder and clip pin are
aligned properly.
NOTE: If equipped with poly or steel tracks, follow
Steps 8 - 11 above.