Pre-load adjustment block
(view from underneath)
Pre-load adjustment plug
Follow these steps to make the adjustment:
1. Turn power off and detach the power cord.
2. Turn the unit over.
3. Use a slotted screwdriver to turn the plug clockwise.
4. Turn until the actuator extends to the 1/8" pre-load dimension, as shown in the figure below.
Pre-Load Adjustment
The pre-load on the cable within the flexible cable assembly is preset at the factory. However, over time the cable
may stretch slightly, causing a change in performance. The pre-load adjustment block allows the user to make
corrections to the pre-load due to cable stretch. If this happens, turn the pre-load plug clockwise to readjust the hex
shaft to the 1/8" (3.2 mm) to 3/8" (9.5 mm) pre-load setting range. Do not exceed the 3/8" (9.5 mm) pre-load limit, as
damage to the unit may result.
The pre-load adjustment block can compensate for approximately 1.5 cc of hydraulic fluid volume. However, only
a small portion of this volume should ever need to be used. In addition, the pre-load typically needs to be adjusted
just once during the early operation of the unit, and, depending on use, may never be required.
1/8" (3.2 mm) to 3/8" (9.5 mm) pre-load dimension
Ultimus IV Series Dispensers
25
www.nordsonefd.com [email protected]
+1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
