5-12 LeeBoy 8515E Conveyor Paver
Maintenance
• Idler bearing housing brackets are not parallel to each
other and the conveyor bed:
• Check the idler bracket. If it appears twisted or
misaligned, slide shaft 1-1/2 inches through the
bearing inside diameter. If the centers are too
far off (more than 1/4 inch), this is why the chain
is climbing the sprocket.
• If excessive, replace chain or sprocket.
You will need a ratchet, extension and 15/16 socket to
make the adjustment. DO NOT use an impact wrench!
Use the following procedure to adjust the ight chains:
1. Use the ratchet to remove the four wing bolts on
each side, then fold out both hopper wings. (Steps
2-3 on Page 5-5)
2. Use a pair of pliers and minimal force to pick up
the chain near the center of the conveyor bed on
each side, then measure and compare the slack
observed. (Figure 5-6)
Figure 5-6. Compare Slack Observed
3. Start the engine to raise the conveyor bed, then
insert safety prop. (Steps 2-3 on Page 5-5) Turn
off engine.
4. Loosen the two idler mount bolts on the left or right
conveyor (or both if adjusting both conveyors),
using an allen wrench to hold the bolt on top while
loosening the 4 nuts underneath. (Figure 5-7)
Figure 5-7. Idler Mount Bolts
MAINTENANCE ADJUSTMENTS
Certain components of the paver need adjustments
for optimum performance, operation and general
maintenance.
Conveyor Flight ChainsConveyor Flight Chains
The conveyor ight chains must be adjusted every 100
hours. If irregular movement of the conveyor occurs, an
adjustment is needed regardless of the time interval.
NOTE: If the adjustment bolt has reached its
maximum adjustment level, remove two links in
the conveyor chain and add a half link. This repair
should bring the adjustment bolts back to full travel.
Entanglement hazard! DO NOT run
the engine while checking and servicing conveyor
components. NEVER perform any adjustments while
the engine is running.
In cold weather, keep conveyor
ight chains properly oiled with cleaning solvent
or release agent. This will prevent conveyor bars
from sticking. Neglect could result in conveyor bar
damage or drive chain failure.
DO NOT adjust the conveyor ight
chains too tight! Clearance (slack) is required for
material to pass under and between chain rollers and
the front idler sprocket. There must be mild tension-
-just enough to take up slack and prevent the chains
from “knuckling.”
The feeder-breaker chain operates most efciently with
a slight amount of slack on the return side. The chains
should not:
• Be pulled too tight.
• Hang too loose.
• ALWAYS adjust both chains exactly the same.
The chains should be slightly slack with constant
tension, measuring slack of 1-1-1/2 inch from the
conveyor bed. A chain(s) “popping and cracking”
indicates the chain is climbing the sprocket, which can
be caused by:
• Excessive run-out of the front sprockets:
• Check to verify sprocket run-out pin on the
shaft. Run-out should not exceed .030 inches.
• If excessive, replace chain or sprocket.
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