c. Toggle Levers. The front drum clutch lever, the
toggle point. The lever will now stay in the forward
position until the operator pulls it back, past the toggle
rear drum clutch lever, the boom hoist clutch lever, and
point, to the neutral (centered) position. It is important
the swing brake lever are designed to "toggle in". Figure
that only the four levers which are designed for toggle
linkage action, and which are listed in this paragraph, be
linkage, which must be understood in order to adjust
allowed to "toggle in" Refer to figure 3-24 and adjust
such linkage. When the linkage moves from the neutral
toggle linkage.
position shown in Sketch 1, point A approaches the
straight line (or toggle point). as shown in Sketch 2. In
the position shown in Sketch 2, the greatest possible
3-40. Chain Adjustments
amount of force is exerted outward against points B and
a. Shovel Crowd Chain Adjustment. Adjustment
C, with little effort on either the neutral position or the
procedures for the shovel crowd chain are covered in
"toggled in" position with a minimum amount of effort. All
the operator has to do is provide the amount of force
b. Reversing Shaft Chain Adjustment.
needed to push the lever past the toggle point in either
direction. and the force exerted against points B and C
(1) Refer figure 3-26 to locate reversing shaft
will force the lever as far in that direction as it can go. In
chain eccentric shaft wrench block.
Sketch 3. the operator has pushed the control lever past
(2) Loosen four capscrews (1, fig. 3-27).
the
(3) Tighten wrench block 121 until the total
midspan chain slack is between 1/1 and 3/8 inch.
(4) Tighten the four capscrews.
3-31
