Anthony Liftgates ETU-20-44, Maintenance Manual

Anthony Liftgates, Inc. 

10 

ETU Maintenance

www.anthonyliftgates.com  

800-482-0003

3.4.3 Solenoid Valve Screen

If the solenoid is working electrically, check the debris 
screen and clean if dirty.

3.4.4 Replacing Solenoid Valve

1.  While installed in the pump, remove nut (1).

2.  Remove coil (2) from cartridge (3).

3.  Remove cartridge (3) from pump body.

4. Replace O-rings (4).

5.  Replace all the parts and attach the new solenoid 

wires. Either solenoid wire can be connected to the 
ground screw on pump body and the other wire 
connected to the control cable.

3.4.5  Checking Cylinder Piston Seals for Drift

1.  Remove the breather hose from the cylinder and 

place a temporary hose from this port into a container 
to catch the fluid as the cylinder is retracted.

2.  Slowly raise the liftgate allowing the oil to be expelled 

from the cylinder into an appropriate container.

3.  Once entirely raised, continue to hold the switch in the 

“UP” position.

4.  If a continuous flow of oil comes out of the breather 

port, then the piston seals are leaking. Replace the 
cylinder.

3.4.6  Checking System Pressure

To check the “power up” pressure setting:

1.  Place the liftgate on the ground and remove the 

pressure hose from the power up port of the pump.

2.  Install a T-fitting (customer supplied) into the power 

up port.

3.  Connect a pressure gauge and reconnect the 

hydraulic hose.

The pressure gauge must be rated above the maximum 
pressure of the liftgate.  For example, use a 4000 psi 
pressure gauge on a 3000 psi maximum capacity liftgate.

4.  Raise the liftgate and check the pressure on the gauge.

Low Pressure Threshold Chart

Model Power 

Up

2000

3000 psi

2500

1850 psi

WARNING

Do not stand or work in the 
platform’s work area while 
operating the liftgate. 

Place the pressure gauge so it can be read while 
operating the liftgate from a safe location.  Serious 
injury or death could result if this action is not followed.

5.  Check the power down relief valve pressure in the 

same way as the gravity down system by installing a 
T-fitting and pressure gauge.