Anthony Liftgates AC-1600, Maintenance Manual

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.

Power Unit

1.  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.

2.  Check reservoir oil level. Refer to section “4.3 Check 

Power Module Fluid Level” on page 10. Fill as 

required with Hyken Glacial Blu.

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

1.  Make sure all electrical wires, switches, and 

connections are in good working condition and operate 

properly.

2.  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. 

3.  Check the fluid level of the vehicle battery.

Safety Signs and Informational Decals

1.  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  Check Power Module Fluid Level

Power Down Models:

 Check the fluid level with the 

platform fully raised. The oil level should be approximately 

1 inch below the filler cap.

1”

ALI-00613a

Gravity Down Models:

 Check the fluid level with the 

platform resting on the ground. The oil level should be a 

maximum of 1 inch from the top of the reservoir.

1”

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.