LeeBoy 8510E, Operation, Service And Parts Manual

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5-38 LeeBoy Model 8510E Conveyor Paver
Maintenance
S
S
TL
45º
Horizontal to 45 ° Chain Tension
45 ° to Vertical
Chain Tension
S
S
45º
TL
S - SLACK
TL - TANGENT LENGTH
Figure 5-49. Chain Slack Adjustment for Proper
Tension
Auger and Conveyor Chain
Tension Adjustment
The auger and conveyor chains need periodic
adjustment. Generally, the slack of a roller chain should
be on the lower side.
(Figure 5-49) 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 deflection,
exert 40 - 60 pounds of force to chain in either
direction.
Tangent Length (TL) Between Sprockets in Inches (Centimeters)
10 (25) 20 (51) 30 (76) 50 (127) 70 (178) 100 (254)
Tangent Length Between Sprockets in Inches (Millimeters)
Horizontal
To 45 °
0.4 - 0.6
(10 - 15)
0.8 - 1.2
(20 - 30)
1.2 - 1.8
(30 - 46)
2.0 - 3.0
(51 - 76)
2.8 - 4.2
(71 - 107)
4.0 - 6.0
(102 - 152)
45 ° To
Vertical
0.2 - 0.3
(5 - 8)
0.4 - 0.6
(10 - 15)
0.6 - 0.9
(15 - 23)
1.0 - 1.5
(25 - 38)
1.4 - 2.1
(36 - 53)
2.0 - 3.0
(51 - 76)
REQUIRED MID-SPAN MOVEMENT