Anthony Liftgates ETU-20-44, Maintenance Manual, Page: 9 / 20

ETU Maintenance
9
Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
Note: One shim can move the ramp end of the platform
as much as 1/2 inch.
b. Raise and lower the platform to recheck its
position.
c. Weld the steel shim plates to the blocks on the
platform.
3. To raise the ramp end, remove material from the
contact area (arrows shown in Step 2) between the
cam plates and platform.
4. If the platform does not align with the floor extension,
contact Anthony Liftgates for a solution to correct the
problem.
3.4 Hydraulic System Maintenance
3.4.1 Adding Fluid to Power Unit Reservoir
1. Check the oil level.
2. With the platform on the ground, the oil level should
be within one inch of the top of the fill plug opening.
1"
3. Pull the fill plug straight out. Add oil to fill the
reservoir to the appropriate fill level.
NOTICE
o prevent damage to the pump, use
only the recommended Hyken
Glacial Blu anti-wear, low-viscosity,
hydraulic fluid in the power unit reservoir.
In an emergency, use any anti-wear hydraulic fluid, but
flush the system and replace it with our recommended
fluid soon as reasonably possible. Do not mix hydraulic
oil and automatic transmission fluid due to possible
compatibility problems.
Use the appropriate viscosity of fluid based on the
surrounding climate conditions. Viscosity is important
because the pump will not cause a temperature increase
to the oil in the reservoir, like a typical closed-loop
hydraulic system.
DO NOT use brake fluid in place of our recommended
fluids.
4. Change the fluid if it is contaminated or dirty, or every
12 to 24 months, depending on use.
3.4.2 Checking Lowering Valve Cartridge and
Solenoid
1. Place the liftgate on the ground in the open position.
2. Place a steel screwdriver over the top of the valve
solenoid.
3. Momentarily activate the control switch in the UP
position. The screwdriver should be attracted to the
magnetic field created by the solenoid.
4. If no magnetic pull is produced, the solenoid is
defective and should be replaced. If the solenoid is
activated, check the cartridge valve.
5. Remove the solenoid from the valve assembly.
6. Remove the valve cartridge from the pump body.
7. Clean the cartridge and blow it dry with compressed
air (not greater than 30 psi). Also, blow out the pump
body.
8. Use a small screwdriver and carefully press on the
spool inside the cartridge. If the spool moves freely,
the cartridge is good. If it does not move, replace
the cartridge, as the spool could be bent, pitted, or
damaged in some other way.