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Tension Reassembly:
Before putting the unit back together, lets inspect some of the parts, and ensure they are in good working order. Any broken or
damaged part will need to be replaced, or repaired as best possible until you can obtain a replacement part
1.
Figure 1 shows us the tension stud disassembled. Normally this unit does not come apart as such. However in our case the
plastic part (circled in fig 1) that holds pressure for the check spring is cracked and will require repairing. We may simply
glue this part to the metal stud for the time being
2.
Once repaired, reassemble the tension stud. Observe that the middle part in fig1 fits onto the stud snuggly, and actually rides
on a little ringed area of the stud – shown in fig 1 by the arrow
3.
Clean the tension discs of any rusting, or other debris. If necessary, using very fine sandpaper, smooth the discs. They must
be very clean, and free of any thing that may hinder the thread flow between them. They should be very smooth
4.
Reassemble the tension unit as follows
a.
Place the 3 discs back on the stud unit
b.
Insert the releasing pin through the middle of the stud, along with the washer
c.
Place the pre-pressure spring on
d.
Install the pre-pressure spring adjusting nut, placing it back where you observed it in step 9 on the previous page
e.
Carefully work the check spring back onto the front & back side of the tension unit
5.
Place the tension unit back in the arm top cover, with the check spring facing down, fig 3, and ensure you have the thread
guide position properly as well. One of the thread guide tangs fits into the arm top cover, fig 3 arrow
6.
Turn the tension stud clockwise so the check spring just touches the machine casting, fig 4
7.
Using a small tension screwdriver, or other tool, turn the tension stud an additional ¼ turn clockwise, hold in place and
tighten the unit with the 5/64 Allen setscrew, fig 4 & 5
8.
Work the tension releasing pin back into the cupped area, and install the releasing pin clip, fig 5
Fig 3
Fig 1
Fig 2
Fig 4
4
Fig 5
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