Figure 3-14. Swing brake adjustment.
end of the saddle block and record this measured
Total midspan slack at the top of the chain must be
maintained at approximately 11/ inch.
(f) Repeat steps (d) and (e) above for each of the other
two marked sections of the dipper stick, each time
adjust the dipper pitch braces in accordance with the
recording the measurements.
type of material being moved and the working conditions.
In general, pin the pitch brace in hole 1 for easy digging
(g) Loosen wear plate bolts and insert shims beneath the
and low bank cuts. Pin the brace in hole 2 for medium or
wear plates until the clearance between the dipper stick
average soil conditions and bank heights, and in hole 3
and the wear plates is approximately 1/64 inch, at the
for hard digging, high banks, and when grading the area.
thickest point of the dipper stick. Adjust both top and
(4) Retract cable tension adjustment. Refer to figure 3-
side clearances in this manner. Shims are slotted so
that they may be tapped into place without removing the
18 and adjust retract cable tension.
(5) Dipper tip cable adjustment. This adjustment should
(2 )Crowd chain adjustment. Adjust for crowd chain
not normally be necessary unless