Vestil EHLTP-3064-3-60-A4 handleiding
Handleiding
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TABLE OF CONTENTS Rev. 11/23/2021 EHLTP MANUAL
TABLE OF CONTENTS Copyright 2020 Vestil Manufacturing Corp. Page 23 of 26
a synthetic transmission fluid if you flush the system with the synthetic fluid
before filling the reservoir. 150 SUS at 100°F (ISO 32 cSt @ 40°C) or Dexron
transmission fluid.
Solenoid valve maintenance. [Refer to MANIFOLD SUBASSEMBLY on p. 18]
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 all loads from the platform.
2. Raise the platform. Lower the maintenance props into the
base frame. Lower the platform until it is entirely supported
by the props.
3. The power unit is attached to the base frame in front of the
handle. Located the manifold assembly which is attached
to the end of the power unit.
4. Remove the nut holding the solenoid coil (part no. 99-153-
015) on the solenoid valve stem. Remove the coil; then
unscrew the valve from the manifold.
5. Inspect the valve for contaminants. Inspect O-rings & 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 (see illustration below). 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 still sticks, the stem could be bent. If the stem is bent, the valve must be replaced.
8. Dry the valve with compressed air while continuing to push the spool in and out.
9. Inspect the bottom of the valve cavity (in the manifold) 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 (see illustration below).
11. Reinstall the solenoid valve. Tighten to 20 ft-lb of torque. Reattach the solenoid coil & 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. Unload the platform.
2. Raise the platform. Lower the maintenance props into the side frame. Lower the platform until the
props are ½”-1” away from the end of the 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 tables with more than 1 cylinder, it will be necessary to open the bleeder valves on all cylinders
simultaneously in order to bleed the valves.
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Productinformatie
| Merk | Vestil |
| Model | EHLTP-3064-3-60-A4 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 5884 MB |
