Vestil EHLT-E-2448-2-41 handleiding
Handleiding
Je bekijkt pagina 14 van 17
TABLE OF CONTENTS Rev. 11/28/2022 EHLT-E MANUAL
TABLE OF CONTENTS Copyright 2022 Vestil Manufacturing Co. Page 14 of 17
Solenoid valve maintenance.
In the event that the platform creeps down slowly after releasing the “DOWN” control, it will be
necessary to remove the lowering cartridge valve for inspection and cleaning.
1. Remove any load from the platform.
2. Raise the platform. Place the maintenance stops in the corners of the
base frame. Lower the platform until it rests on the stops.
3. On most EHLTD models, the power unit is attached to the hinged side of
the scissor lift mechanism. The manifold assembly is attached to the end of
the power unit.
4. Remove the nut holding the solenoid coil (item (2), right) on the solenoid
valve stem. Remove the coil (2); then unscrew the valve (7) from the
manifold.
5. Inspect the valve for contaminants. Inspect the O-rings and back-up
washers for cuts, tears, or other damage.
6. With the valve immersed in mineral spirits or kerosene, insert a thin tool
such as a small screwdriver or a small hex wrench in the hole at the bottom
of the valve (illustration, next page). Push the spool in and out several times.
A properly functioning spool should move freely, with about 1/16” of travel.
Use mineral spirits to flush the valve.
7. If the spool continues to stick, the stem could be bent. The valve will need
to be replaced.
8. Blow the valve off with a compressed-air gun while again pushing the
spool in and out.
9. Inspect the bottom of the manifold’s valve cavity for contaminants.
10. Make sure both O-rings and outer seal (flat) are seated on the valve
body. Make sure the screen filter is in place and seated at the bottom of
the threads on the valve body (illustration).
11. Reinstall the solenoid valve, tightening to 20 lb∙ft of torque. Reattach
the solenoid coil and the retaining nut.
Bleeding Air from the Hydraulic Cylinder.
Air can enter the hydraulic system at any time its components are opened for service. Symptoms of air
in the system include erratic or bouncing motion of the platform, sponginess in holding position, unusual
noises, or foaming in the hydraulic fluid. Trapped air can also trigger the cylinder’s velocity fuse, slowing or
preventing the cylinder from lowering.
Cycling the platform up and down without a load can expel much of the trapped air through the
hydraulic reservoir. If it becomes necessary to bleed air from the system:
1. Remove any load from the platform.
2. Raise the platform. Pivot the maintenance prop and set the free end on the base frame. Lower the
platform until the prop is about ½”-1” away from the corner of the base frame. Some motion is necessary to
expel air from the system.
3. Hold a rag over the cylinder’s bleeder
valve to capture expelled oil. The valve is
located at the top of the cylinder (see
illustration). Use a ¼” wrench to open the
valve about a half-turn.
4. Oil and air will sputter from the valve. Once
no more air comes out, close the valve.
5. For multi-cylinder lift tables, it will be
necessary to open the bleeder valves on all
cylinders simultaneously in order to bleed the
valves.
NOTE: Your model might have only 1 maintenance prop.
Bekijk gratis de handleiding van Vestil EHLT-E-2448-2-41, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Vestil |
| Model | EHLT-E-2448-2-41 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 3585 MB |
