Alltech KEENAN MechFiber340, Руководство оператора

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Revision G04 July 2018
8.2 CHAIN TENSIONING
1. Setting Tension on Primary Chain
Contrary to previous versions of this machine, it is not necessary to adjust the
pivotal position of the input shaft housing for normal chain tension adjustment.
This should only require attention when replacing a chain.
The tension is set by adjusting the lower spring seat underneath the tensioner
arm. The spring assembly is fitted with an adjustment indicator which uses
the lower edge of the spring as its marker. When it aligns with the green or
“OK” portion of the decal then the tension is set correct and does not require
adjustment. But if the lower edge of the spring is outside this section, in the red,
then adjustment is required. The decal arrow indicates the direction in which to
adjust.
The lower spring seat is an internally threaded sleeve which sits on guide shaft.
It has a shoulder for the spring to seat against and a hexagon section at the
bottom for adjustment. A similar sized hexagon nut is used to lock the seat in
position.
To adjust first remove the 2 x 70mm wrenches from their storage location on the
rear face of the front panel on the left side of the machine (see Figure 9.1).
Swing the tensioner indicator upwards to allow full access to the spring seat
nuts. Using the wrenches open the locknut (lower nut) and screw clear of
the spring seat. The spring seat can now be adjusted up or down to set the
compressed length to 150mm (Its free length is 200mm). The lower edge of
the spring should now be positioned in the centre of the green section of the
indicator. This provides the correct tension of approx. 100kg to the chain. To
lock the setting, hold the spring seat in position with one of the wrenches and
tighten the locknut against it with the other.
It is recommended to check the tension weekly in the first few weeks of
operation as the chain, sprockets and tensioner “beds in” and may need to
be adjusted.
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Figure 9.1: Storage position of primary tensioner Figure 9.2: Primary chain tensioner
spring setting adjustment wrenches
2. Setting Tension on Secondary Chain (Rotor Chain)
The tension is set by adjusting the position of the arm securing the spring assembly. Remove
the nut and bolt securing the arm. Move the arm until the springs are at an extension just over
700mm which provides sufficient tension on the chain. When set, replace the securing nut
and bolt. The 3rd hole position is a good reference point (see figure 9.4) but the tension spring
length should be verified by measurement also.