Head Pulley Adjuster
Belt Wiper
Figure 5-7. Head Pulley Adjuster and Belt Wiper
Conveyor Belt Wipers
The conveyor belt wipers are mounted immediately
below the conveyor head pulleys and contact the
conveyor belt. (Figure 5-7) They serve to remove
any material sticking to the belt as it moves toward the
receiving hopper. Periodically check for clearance
between the conveyor belt wipers and the conveyor
belts. You can access the belt wiper(s) via the front
conveyor panels.
To adjust the conveyor belt wipers, loosen the bolts
across the channel strip and move the wiper up until it
touches the conveyor belt.
Conveyor Chute Liners
Rubber chute liners are located
on each side of the conveyor
belts to prevent aggregate
material from leaving the
conveyors. (Figure 5-8) They
should also be periodically
adjusted to touch the conveyor
belts evenly along the entire
length of the conveyor belts.
Adjust the chute liners when
necessary by loosening the
channel strip bolts and moving
the rubber liner until it touches
the conveyor belt.
Chute Liners
Figure 5-8. Chute
Liners
Auger and Spreadroll Chains
The auger and spreadroll hopper chains need periodic
adjustment, and should be inspected every 50 hours of
operation.
Generally, the slack of a roller chain should be on the
lower side. (Figure 5-9 and Table 5-3) Adequate
slack (S) is about four (4) percent of the span for normal
drives, but the slack should be about two (2) percent of
the span for the auger chains:
• Vertical drive or close to vertical drive.
• Center distance between two shafts is greater than
three (3) feet.
• Chain is operated under heavy load and high
frequency of on and off drive.
• Direction of the drive is often changed.
Auger and conveyor chains must have
a slack of 1/4 to 3/8 inches. To measure deection,
exert 40 - 60 pounds of force to chain in either
direction.
TL
45º
Horizontal to 45° Chain Tension
45° to Vertical
Chain Tension
S
S
45º
TL
S - SLACK
TL - TANGENT LENGTH
Figure 5-9. Chain Slack Adjustment for Proper
Tension
Maintenance
Rosco CSV Variable Width Chip Spreader5-10
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General