Anthony Liftgates MTU-GLR Series, Maintenance Manual

MTU-GLR Maintenance 

13 

Anthony Liftgates, Inc. 

800-482-0003 

 www.anthonyliftgates.com

Both the motor start solenoid and power cut-off solenoid 

can be checked by bypassing the solenoid itself.

1.  Use jumper cables for this test.
2.  Connect one jumper cable to battery side (1) of the 

solenoid.  Connect the other cable to motor side (2) of 

the solenoid.

3.  If the liftgate is activated, the solenoid is defective and 

should be replaced.

4.7  Checking the Power Cable

To check for a defective power cable, run the motor 

directly from a spare battery using jumper cables.

1.  Remove the battery connection to the motor.
2.  Connect the negative jumper cable (ground) directly 

to the liftgate.  Connect the positive cable to the 

terminal on the motor start solenoid.  

3.  If the motor operates, the battery cable is defective 

and should be replaced.

4.8  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 lowering 

valve solenoid.

ALI-00593

3.  Momentarily activate the control switch in the DOWN 

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.

4.9  Solenoid Valve Screen

If the solenoid is working electrically, check the debris 

screen and clean if dirty.