Alltech 30L100, Operator'S Manual

Page: 25 / 77

KEENAN MechFiber300 Operator’s Manual
25
Revision F01 06
th
March 2020
8.2 Chain tensioning
1. Setting tension on Primary Chain
a) With the ASA100 chain in place, tighten the threaded adjuster on the spring until there is
approximately 70mm of thread seen between the ring holding the spring and the adjuster
mounting plate.
This setting will provide the required wrap around the idler sprocket (See Figure
9.1). Tighten locknut against shoulder plate as shown.
b) Tighten the gearbox retainer/adjuster
bolt, using nut “B” until the slack is fully taken up and
continue to tighten until the spring reaches 30
–40 mm extension,
195
–205mm
coil length (See
Figure 9.1).
c) Run machine to confirm the spring maintains its tension during one complete revolution of
the primary drive. (The acceptable alignment in the auger will cause some movement of the
spring in operation and is normal)
d) Once tension is set, tighten nut on retainer/adjuster bolt in sequence below:
1. Adjust Nut "B" against the outer face of the shoulder plate to achieve correct tension
setting on the primary chain.
2. Tighten Nut "C" against the inner face of the shoulder plate.
3. Hold nut "C" with spanner and torque nut "B" to 320 Nm.
4. Tighten Nut "D" against Nut "C" and torque to 320 Nm.
5. Tighten Nut "A" against Nut "B" and torque to 320 Nm.
e) When running, the tensioner should maintain a load on the chain under all conditions and
loads. It is recommended to check the tension weekly in the first few weeks of operation,
as the chain, sprockets and tensio
ner “beds in” and may need adjustment.
2. Setting tension on Secondary Chain (Rotor Chain)
a) The spring assembly on the secondary chain tensioner should be set such that there is
approximately 750 mm extension on the spring, measured on the viewable coiled section (See
Figure 9.1).
Secondary
chain adjuster
Gearbox retainer
and primary
chain adjuster
bolt
Figure 9.1: Chain tension details