Tightening Return
Spring Tension
The return spring moves the spindle back up when the coarse downfeed handles are released. The tension of this spring was adjusted at the fac- tory, but it may need to be tightened during the life of the mill/drill.
Important: Do not perform this procedure unless it is absolutely necessary.
During this procedure, you will loosen the spring cover thumb screw (See Figure 59) just enough to pull the cover back to clear the roll pin, then rotate the cover counterclockwise to fit the roll pin in the next slot.
| Roll Pin | |
Cover |
| |
Thumb | Cover | |
Slots | ||
Screw | ||
|
Figure 59. Return spring components.
To adjust the return spring tension:
1.disCONNECT MACHINE FROM POWER!
2.Wipe off any oil on spring cover so it does not slip when you hold it during adjustments.
3.Mark slot on cover that engages the roll pin at the
4.put on heavy leather gloves to protect your hands from lacerations if spring uncoils dur- ing next step.
Note: Keep a good grip on spring cover dur- ing next step. Letting go of cover when roll pin is not engaged will cause spring to rapidly uncoil.
5.While holding spring cover against side of headstock so the spring will not unwind, loosen thumb screw approximately 1⁄4".
6.pull cover out to disengage it with roll pin, then rotate it counterclockwise to engage roll pin in the next slot in cover.
7.
If the return spring should come loose from the spring cap and rapidly unwind,
laceration or impact inju- ries could occur. Always 
wear heavy leather gloves
and safety glasses when
adjusting the return spring tension.
Model G0755 (Mfg. Since 1/13) |
