Vestil AY-208430 handleiding
Handleiding
Je bekijkt pagina 4 van 12
Table of Contents Rev. 0225 AY MANUAL
Table of Contents Copyright 2025 Vestil Manufacturing Co. Page 4 of 12
3) Stand clear of the ramp. Make sure that the driver of the vehicle can see you. Direct the driver to bring the
back of the vehicle/trailer into contact with the rubber bumpers. The ramp lip must overlap the vehicle
bed by at least 4 inches (10.2cm).
4) Make sure that the vehicle is in park, that the engine is turned off, and that the parking brake is set. Chock
the wheels of both the vehicle and the trailer. If you have questions about requirements for chocking
wheels, contact your state occupational safety and health (OSH) agency. An interactive map of these
United States with links to state OSH offices is provided online at https://www.osha.gov/dcsp/osp/.
5) Attach the ramp chains to the vehicle without slack. Chock ramp wheels.
6) Slightly open the release valve by pushing the top of the lever towards the ramp. The ramp will lower
slowly. When the ramp rests on the vehicle bed, fully open the valve by pivoting the lever away from the
ramp. By fully opening the valve, the ramp lip is entirely supported by the trailer/vehicle bed. This allows
the ramp to move with the truck/trailer bed during loading or unloading operations.
7) When loading/unloading operations are finished, close the release valve by moving the lever back to
home position (vertical). Move the pump handle back-and forth to lift the ramp off of the vehicle bed.
Keep moving the handle until the lip is 2 inches or more above the bed.
8) Disconnect the safety chains. The ramp wheels should remain chocked whenever the ramp is parked.
HYDRAULIC PUMP: SEQUENCE OF OPERATION
The ramp uses a hand-operated hydraulic pump to control up-and-down movement. With the lowering
lever in the closed position, moving the pump handle back-and-forth causes the hydraulic cylinders to
extend. Both cylinders are pinned to the landing gear and to the underside of the ramp. As the cylinders
extend, they push the movable part of the landing gear away from the ramp.
Lower the ramp by pushing the top of the release lever towards the ramp. Stop the lowering process by
releasing the lever. The lever automatically returns to the home position. The ramp can also be rapidly
lowered by pulling the top of the release lever away from the ramp. However, this should only be done if
the lip of the ramp is already in contact with the bed of a truck or trailer. Close the valve by returning the
release lever to the home position. See USING THE RAMP diagram on p. 3-4. The lever must be in the closed
position to raise the ramp.
BLEEDING AIR FROM THE HYDRAULIC SYSTEM
If the ramp does not lower, a feature called a velocity fuse might be closing. The fuses are safety-
enhancing mechanisms that prevent the ramp from collapsing if hydraulic pressure is lost. A velocity fuse is
coupled to each cylinder. Air trapped in the hydraulic circuit might cause 1 or both of the fuses to close.
When a fuse closes, the ramp cannot lower until air is removed from the circuit. If you experience this issue,
first try to open the fuses by pumping the handle. Make sure that the release lever is in home position (see p.
4) while pumping the handle. Then, try to lower the ramp by pressing the release lever forward (towards the
ramp). If this approach does not solve the issue, then air must be bleed from the circuit. Two people should
work together to bleed air from the circuit:
1. Lift the ramp with external means to remove the load from the cylinders. For instance, use at least 2 jacks
rated to lift the full weight of your ramp. Ramp weights by model appear in the Specifications tables on
pages 2 & 3. Brace the elevated end of the ramp with blocks and chock both sides of both wheels.
2. Locate the bleeder screw on the base of each cylinder. It looks like a grease zerk.
3. Open the bleeder valve of one cylinder about
1
/
2
turn with a
1
/
4
in. or
5
/
16
in. wrench. Hold a rag over the
bleeder valve of the cylinder. The other person should move the handle back and forth just once. Oil
and air will sputter from the valve. Continue this process—pumping the handle once and watching air
bubble out of the bleeder—until no more air escapes. Just a clear stream of oil will flow from the
bleeder. Tighten the screw when you no longer hear and/or see escaping from the bleeder.
4. Perform the bleeding procedure from Step 3 on the other cylinder.
5. When air has been removed from both cylinders, securely tighten the bleeder screws.
Bekijk gratis de handleiding van Vestil AY-208430, 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 | AY-208430 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 3389 MB |
