Harrington Hoists and Cranes ED-DA Hoist - (ED3) - Manual (Page 24)

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4.3.6 Dual Speed Cylinder Control (DA) Model (DS) Low and High Speed Adjustment – The controller has
speed adjustments which allow the lifting and lowering speeds to be adjusted to suit the application or
compensate for low or high supply voltage. Turn the Low Speed Adjustment Switch (right side of
operating box) or High Speed Adjustment Switch (left side of operating box, model ED3 only) with
screw driver or the knob provide to adjust the speed. To increase the speed, turn the speed
Adjustment Switch clockwise; to decrease, turn it counterclockwise. Refer to Figure 4-4 and Figure 4-5.
Figure 4-4 Low Speed Cylinder Adjustment
Figure 4-5 High Speed Cylinder Adjustment
4.3.7 Dual Speed Cylinder Control (DA) Model Detachable Hook – The Bottom Hook on the cylinder control
DA model is removable. Remove and attach the Bottom Hook as follows:
1) Refer to Figure 4-3.
2) To detach the Bottom Hook rotate the Hook Cam to the left (counterclockwise).
3) To attach the Bottom Hook push the hook into the Hook Cam from the bottom until the hook
snaps in place. Make certain the Hook Cam is fully rotated into the closed position.

Always make sure the Hook Cam is completely locked and that the hook will
not detach.
4.4 Electric Chain Hoist with Trolley
4.4.1 To operate the electric chain hoist with trolley, move it horizontally by either pushing the lifted load or
the Load Chain.
4.4.2

Never pull the coiled cord, pendant or pendant cord. Pulling the coiled cord,
pendant or the pendant cord may disconnect cord wires. Disconnectd wire(s) may cause a short circuit
in the hoist body or any surrounding conductor, giving the operator electric shock.
4.4.3

Always move the hoist horizontally by grasping the cylinder grip or pushing the
load.