Harrington Hoists and Cranes ED-DA Hoist - (ED3) - Manual (Page 23)

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4.3.4 Dual Speed Pendant Model (DS) Low Speed Adjustment – The Pendant has a low speed adjustment
which allow the low speed to be adjusted to suit the application or compensate for low or high supply
voltage. Adjust the low speed as follows:
1)

Before proceeding, ensure that the electrical supply for the hoist or trolley
has been de-energized (disconnected). Lock out and tag out in accordance with ANSI Z244.1
“Personnel Protection -Lockout/Tagout of Energy Sources”.
2) Open the back cover of the Pendant (as depicted in Figure 4-2).
3) Turn the Speed Adjustment Screw clockwise to increase the low speed or counterclockwise
to decrease it.
4) Close the back of the push button switch.
Figure 4-2 Speed Adjustment for Dual Speed Pendant
4.3.5 Dual Speed Cylinder Control (DA) –The in-line hand grip and switch assembly is directly attached to
the Bottom Hook. As illustrated in Figure 4-3, the switch is cylinder shaped.
 Lifting And Lowering - The load is lifted when the Cyninder Control is pushed up and lowered when
pushed down.
 Speed Selection – Press the Speed Selector Switch to select low or high speed. “H” on the left
side is high speed and “L” on the right is low speed. The red light on the left illuminates when high
speed is selected and the green light on the right illuminates when low speed is selected.
Figure 4-3 Dual speed Cylinder Control