Anthony Liftgates MTU-GLR Series, Maintenance Manual

Anthony Liftgates, Inc. 

10 

MTU-GLR Maintenance

www.anthonyliftgates.com  

800-482-0003

4.  Maintenance

4.1  Monthly Inspection

All Anthony Tuckunder Liftgates are “Service-Free” which 

means they have lubrication-free bushings at the major 

pivot points.  

Mechanical Components

1.  Make sure the liftgate operates freely and smoothly 

throughout its entire range of movement.

2.  Check for damage to the liftgate, such as bent or 

distorted parts.  Check for excessively worn parts.

3.  Check for cracked welds which may have resulted 

from overload or abuse.

4.  Check all pins and pivot points.  Secure all pins with 

proper retainers. Replace worn bushings and pins.

5.  Oil the roller of the wheel arm and make sure it spins 

freely.

6.  Make sure the platform is angled upward from truck 

bed 1/2 to 3/4 inch when raised to bed height.  See 

Platform Adjustment for shimming procedure, “3.3 

Mechanical Platform Adjustment” on page 8.

Power Unit

7.  Check for oil leaks in the following areas:

a.  Hydraulic lift cylinder.
b.  Hydraulic hoses.  Replace any hose that shows 

signs of leakage or excessive abrasion of the 

covering.

c.  Check all hydraulic fittings for damage or leakage.  

Tighten fittings to stop leaks or replace if damaged.

8.  Check reservoir oil level. The fluid level should be 2 

inches from the top of the reservoir when the liftgate 

platform is in the fully raised position. Fill as required 

with Hyken Glacial Blu.

2”

ALI-00613a

NOTICE

To 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.
Electrical Components

9.  Make sure all electrical wires, switches, and 

connections are in good working condition and 

operate properly.

10. Proper wire connection is crucial to the life and 

dependability of the liftgate’s electrical components.  

A poor connection can result in low Voltage, causing 

the liftgate to work incorrectly. 

11. Check the fluid level of the vehicle battery.  Fill as 

required.

Safety Signs and Informational Decals

12. Examine all warning, capacity, and operational 

decals.  If they are not readable, replace them.  

Decals may be obtained free of charge your 

authorized dealer.

4.2  Semi-Annual Inspection

In addition to the items requiring monthly inspection, also 

inspect the condition of the hydraulic fluid.

If the oil in the hydraulic tank is dirty, drain the oil and 

flush the entire system.  Refill the system with the 

recommended oil outlined in Step 8 of the “Monthly 

Inspection” section.

4.3  Adjusting Wheel Arm

The wheel arm helps unfold the platform as it is lowered 

from the stored position. The wheel arm can be adjusted, 

so the platform unfolds with either greater or lesser effort.

WARNING

Never stand behind the 

liftgate when it is opened.  

Always stand to the side 

and away from the edge of the platform. 

When adjusting the position of the wheel arm, consider 

that the vehicle may be parked on an upward sloped 

surface.  Adjust the wheel arm to prevent the platform 

from completely unfolding in this type of situation.

1.  If adjustment is needed, remove the two bolts and 

nuts on the wheel arm.