Anthony Liftgates ETU-20-44 User manual

ETU
MODELS
ETU-20-44
ETU-25-50
For Serial Number 123751 and Greater
MAINTENANCE MANUAL
MADE IN THE USA
Quality, Reliability, Customer Service

ETU Maintenance 3 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
Contents
1. General Information.........................4
1.1 Introduction ...........................4
1.2 General Safety.........................4
1.3 State and Federal Regulations ............4
1.3.1 Lighting .........................4
1.3.2 Rear Impact Guards ...............4
1.4 If Maintenance Help is Required ...........4
1.4.1 Maintenance (Dealer) ..............4
1.4.2 Customer Service and
Parts(EndUser)..................4
1.5 Warranty .............................5
2. Safety....................................5
2.1 Safety is Your Responsibility ..............5
2.2 SafetyIconsNomenclature...............6
2.3 Safety Rules...........................6
2.3.1 Personal Protection................6
2.2.1 Personal Protection/Important
Information ......................6
2.2.2 Prohibited Actions . . . . . . . . . . . . . . . . . 6
2.2.3 Hazard Avoidance.................6
2.3.2 Equipment / Tools / Parts ...........7
2.3.3 Battery / Fuel Tank Safety...........7
3. Maintenance ..............................8
3.1 MonthlyInspection......................8
3.2 Semi-Annual Inspection..................8
3.3 Mechanical Platform Adjustment ...........8
3.4 Hydraulic System Maintenance ............9
3.4.1 Adding Fluid to Power Unit Reservoir . . 9
3.4.2 Checking Lowering Valve Cartridge
and Solenoid .....................9
3.4.3 Solenoid Valve Screen ............10
3.4.4 Replacing Solenoid Valve ..........10
3.4.5 Checking Cylinder Piston Seals for
Drift...........................10
3.4.6 Checking System Pressure.........10
3.4.7 Checking Flow Control Valve .......10
3.5 Electrical System Maintenance ...........11
3.5.1 Checking 10 Amp Control Switch Fuse11
3.5.2 Control Switch Wiring .............11
3.5.3 Checking the 175 Amp Power
Cable Fuse .....................11
3.5.4 Checking Motor Start Solenoid . . . . . .12
3.5.5 Checking the Power Cable .........12
4. Decals..................................13
4.1 Installing Decals.......................13
5. Troubleshooting Chart ......................16

Anthony Liftgates, Inc. 4 ETU Maintenance
www.anthonyliftgates.com 800-482-0003
1. General Information
1.1 Introduction
Congratulations on selecting an Anthony Liftgates
TuckUnder™ liftgate.
All Anthony tuckunder model liftgates are factory
assembled, energized, and tested to ensure the
highest quality performance standards. ETU liftgates
ship completely assembled for fast, clean, and easy
installation.
To ensure your liftgate will perform to your expectations,
we have provided this Installation Manual, which is
designed to provide you with the necessary installation
instructions and safety precautions for the installation of
the ETU TuckUnder™ liftgates.
Typical Anthony Liftgates ETU Tuckunder Model.
1.2 General Safety
WARNING Read, Understand, and
Follow the Manual
The success or failure of
this liftgate to properly and efficiently operate depends
on an ongoing preventative maintenance program.
Failuretoread,understand,andfollowthemaintenance
instructions and safety recommendations in this
manual can result in serious injury or death.
Also, read and understand the operating instructions
in the separate Operation Manual before performing
any maintenance.
1.3 State and Federal Regulations
1.3.1 Lighting
WARNING If any lighting is installed or
changed, it must not alter or
prevent vehicle compliance with
any existing State or Federal standards such as
FMVSS 108 – Lamps, Reflective Devices, and
Associated Equipment.
1.3.2 Rear Impact Guards
WARNING When stored in the transport
position, this liftgate must
provide protection against rear
impact and comply with State and Federal standards
in your area. Anthony Liftgates offers a bolt-on
bumper, which meets the requirements of this
standard.
1.4 If Maintenance Help is Required
1.4.1 Maintenance (Dealer)
For additional information on installation, refer to the ETU
TuckUnder™ liftgate website www.anthonyliftgates.com.
7R¿QGWKHPRVWFXUUHQWYHUVLRQRIWKHUHIHUHQFHPDWHULDO
choose LIFTGATES, TUCKUNDER™, ETU, and then
DOWNLOADS.
If you have any doubts or questions about installation,
call us. Before doing so, have the serial number, model
number, and lift capacity of your liftgate available.
Anthony Liftgates, Inc.
1037 West Howard Street
Pontiac, Illinois 61764
[phone] or 800-482-0003
1.4.2 Customer Service and Parts (End User)
For service or ordering replacement parts, contact an
authorized dealer by going to www.anthonyliftgates.com
and selecting the FIND A DEALER tab. Enter your zip
FRGHWR¿QGWKHQHDUHVWDXWKRUL]HGVHUYLFHORFDWLRQ
SAFETY
INSTRUCTIONS
N
I
NG
AR Being unaware of safety
recommendations can
lead to personal injury.
The user must make sure all decals are attached to
the liftgate and truck and are legible.

ETU Maintenance 5 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
1.5 Warranty
For a detailed copy of the Warranty Statement, refer
to the Operation Manual. To make an online warranty
claim go to www.anthonyliftgates.com and select
CUSTOMER SERVICE and then select WARRANTY
CLAIM.
Before calling with questions or other product information
requests, have the serial number, model number, and
lift capacity of the liftgate available. This information is
VWDPSHGLQWRWKHLGHQWL¿FDWLRQSODWHRQWKHVLGHRIWKH
adapter frame tube.
NOTICE Maintain the liftgate according to
these instructions or the warranty
will be void.
1. Unauthorized modifications may cause improper
operation or other unforeseen problems or dangers.
If any deviation is deemed necessary, obtain written
permission from Anthony Liftgates.
2. Verify that all decals are attached and legible, or all
warranties are void.
2. Safety
2.1 Safety is Your Responsibility
It is the responsibility of the user to understand and
properly use this liftgate. Be aware of the inherent
dangers in the use of this product. Read, understand,
and follow all Warnings, Cautions, Notices, and Safety
Instructions in this manual, on the liftgate, or the truck.
Accidents can often be avoided by being alert and
recognizing potentially hazardous situations. Anyone
operating the liftgate must have the necessary training
required to use the liftgate safely. The safety information
in this manual serves as an essential guide in an attempt
to prevent injury or even death.
Anthony Liftgates cannot anticipate every possible
circumstance that might involve a potential hazard. The
LGHQWL¿FDWLRQRIKD]DUGRXVVLWXDWLRQVLQWKLVPDQXDODQG
on the product itself is, therefore, not all-inclusive. If you
use procedures, work methods, or operating techniques
QRWVSHFL¿FDOO\PHQWLRQHGE\$QWKRQ\/LIWJDWHV\RXPXVW
satisfy yourself that they are safe for you and bystanders.
Make sure the liftgate or truck is not damaged or made
unsafe by any operating method you choose.
DO NOT proceed if any doubt arises about the correct
or safe method of following any instructions found in this
or other related equipment manuals. If in doubt, seek
out expert assistance from your authorized dealer before
continuing.
Safety Signal Words
7KH³6DIHW\$OHUW6\PERO´LGHQWL¿HVSHUVRQDOLQMXU\
hazards and is followed by a signal word such as
WARNING or CAUTION to indicate the severity of
the danger.
This safety alert icon surrounds an image showing
DVSHFL¿FW\SHRILQMXU\WRDYRLG7KHVHLFRQVDUH
shown in “2.2.3 Hazard Avoidance” on page 6.
WARNING Indicates a potentially hazardous
situation which, if not avoided,
COULD result in death or serious
injury.
CAUTION Indicates a potentially hazardous
situation which, if not avoided,
MAY result in minor or moderate
injury.
NOTICE Indicates that equipment or property
damage can result if instructions
are not followed.
SAFETY
INSTRUCTIONS Indicates specific safety-related
instructions or procedures.
Note: Contains additional information important to a
procedure.

Anthony Liftgates, Inc. 6 ETU Maintenance
www.anthonyliftgates.com 800-482-0003
2.2 Safety Icons Nomenclature
This manual and the equipment have numerous safety
icons. These safety icons alert you to potential personal
injury hazards and draw attention to essential user
instructions.
2.2.1 Personal Protection/
Important Information
Read the manual
Eye protection
Face shield / welding
helmet
Breathing protection
Head protection
Protective shoes
Hand protection
Use two people when lifting
heavy objects
Use proper tools
Weight rating
Set parking brake
Remove key
Lockout / prevent use
OEM OEM parts
N
I
NG
AR Damaged safety sign
2.2.2 Prohibited Actions
Do not alter or modify
Do not weld
No smoking
No open flame
No alcohol
No drugs
2.2.3 Hazard Avoidance
Safety alert symbol
Slipping injury
Tripping injury
Pinch point hazard
Pinch hazard (foot)
Dangerous fumes
Adequate ventilation
Crush hazard
Crush hazard
Crush hazard (chock
wheels)
Chock wheels /rollover
hazard
Fall hazard (truck)
Fall hazard (platform)
Damaged parts hazard
Fire hazard
Sparks / fire hazard
Battery gas hazard
2.3 Safety Rules
2.3.1 Personal Protection
WARNING Do not work under the lift-
gate while it is in a raised
position. Unintentional
lowering of the liftgate can cause severe crushing
injuries.
CAUTION
When servicing this unit, wear appropriate personal
protective equipment. This list may include, but is not
limited to:
• A hard hat.
• Protective shoes with slip-resistant soles.
• Protective goggles, glasses, or face shield.
• Protective clothing.

ETU Maintenance 7 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
CAUTION Anthony Liftgates
recommends not
riding the liftgate;
however, if the operation requires it, make sure your
footing is stable before raising or lowering the
platform. Always stand away from the edge. When on
the ground, always stand clear of the liftgate when it
is operating.
Do not attempt to maintain the liftgate
under the influence of drugs or alcohol.
Consult your doctor before using the
liftgate while taking prescription medications.
To prevent personal injury, clean up any
spilled fluids immediately. To avoid
tripping, do not leave tools or
components laying around in the work area.
Failure to prevent the truck from moving
during the maintenance of the liftgate
could result in a severe crushing injury.
Always apply the truck’s parking brake
and remove the ignition key before
operating the liftgate. Failure to follow
this recommendation can result in injury.
Do not place hands or feet
into pinch points areas,
between the platform and
the platform extension, or under the edge of the
platform.
Maintained of the liftgate and its related
components must be performed by qualified
personnel.
N
I
NG
AR To prevent possible injuries due to improper
operation, make sure all decals are attached to
the liftgate and truck and are legible at all
times.
2.3.2 Equipment / Tools / Parts
CAUTION Do not operate this unit if
it is damaged. If you
believe the unit has a
defect, which could cause it to work improperly,
immediately stop operation and remedy the problem
before continuing.
Make sure the liftgate or truck is not damaged
or made unsafe by the maintenance procedures
used for this liftgate.
Never secure the power cable to anything
which allows it to contact sharp edges, other
wiring, the fuel tank, fuel lines, brake lines, air
lines, exhaust system, or any other object that could
cause the power cable to wear or be damaged. A cut
battery cable can cause sparks causing component
damage resulting in loss of vehicle control, serious
injury, or even death.
CAUTION OEM If replacement parts are
necessary, genuine
factory OEM replacement
parts must be used to restore the liftgate to the
original specifications. Anthony Liftgates will not
accept responsibility for damages as a result of using
unapproved parts. Using non-OEM replacement parts
voids the warranty.
2.3.3 Battery / Fuel Tank Safety
WARNING Keep sparks,
lighted
matches, and
open flames away from the top of the battery because
battery gas can explode. Always follow all the
manufacturers’ safety recommendations when
working around the truck’s battery.
Take precautions to avoid sparks coming into
contact with the truck’s fuel tank, brake lines,
or other flammable components. Sparks can
causeanexplosion of combustible materials,resulting
in serious injury or death.
Cutting Torch / Welding Safety
WARNING Take precautions to avoid
sparks from contacting
the truck’s fuel tank, brake
lines, or other flammable components. Sparks can
ignite combustible materials, resulting in serious
injury or death.
Always weld or use a cutting
torch in a well-ventilated area
and, if in an enclosed area, vent
the fumes to the outside. Breathing welding smoke
and paint fumes can cause serious injury.
Always follow all State and Federal health and
safety laws and local regulations when using an
arc welder, mig welder, or cutting torch. Also,
follow all manufacturers’ safety guidelines. If other
people are present when welding on the liftgate, shield
the assembly area from their view.
To avoid eye injury during welding, always
wear a welding helmet with the proper lens to
protect your eyes.
To avoid eye injury while using a cutting torch,
always use eye protection with the proper lens
to protect your eyes.
SAFETY
INSTRUCTIONS Do not modify safety
devices. Do not
weld on the liftgate
assembly,excepttheadapterframetube. Unauthorized
modifications may impair its function and safety.
Make sure all parts are in good working
condition and properly installed. Replace any
damaged parts immediately.

Anthony Liftgates, Inc. 8 ETU Maintenance
www.anthonyliftgates.com 800-482-0003
3. Maintenance
3.1 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 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 and fill as required with
Dexron VI, Dexron III or Hyken Glacial Blu.
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.
3.2 Semi-Annual Inspection
In addition to the items requiring monthly inspection, also
LQVSHFWWKHFRQGLWLRQRIWKHK\GUDXOLFÀXLG
If the oil in the hydraulic tank is dirty, drain the oil and
ÀXVKWKHHQWLUHV\VWHP5H¿OOWKHV\VWHPZLWKWKH
recommended oil outlined in Step 8 of the “Monthly
Inspection” section.
3.3 Mechanical Platform Adjustment
The ramp (outboard) end of the platform should be 1/2 to
LQFKHVKLJKHUWKDQWKHWUXFNÀRRUZKHQLQWKHUDLVHG
position. If the outboard end of the platform is sagging,
add shims as described below. Shimming is a routine
procedure as the liftgate ages, and the parts become
worn.
1/2" to 3/4"
1. Lower the platform to the ground, it should touch at
the lift arm end and the ramp end (arrows).
2. To lower the ramp end:
a. Temporarily position a shim plate in the contact
area (arrows), between the cam plates and
platform, with tape.

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.

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.

ETU Maintenance 11 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
3.4.7 Checking Flow Control Valve
If the cylinder does not operate or operates slower
WKDQXVXDOUHPRYHWKHÀRZFRQWUROYDOYHDQGKRRNWKH
hydraulic hose directly to the cylinder. If the cylinder
RSHUDWHVSURSHUO\UHSODFHWKHÀRZFRQWUROYDOYH
WARNING Do not operate the liftgate
without the flow control
valve. Serious injury or
death could result if this action is not followed.
3.5 Electrical System Maintenance
3.5.1 Checking 10 Amp Control Switch Fuse
If the control switch is not operating the liftgate, check the
in-line fuse located on the control cable inside the power
unit box.
Replace the fuse with part number A-150438, 10 Amp
Fuse.
3.5.2 Control Switch Wiring
2
3
1
1. Yellow solenoid wire to green control cable wire.
2. Black 10 Amp fuse wire to black control cable wire.
3. Red motor start solenoid wire to white control cable wire.
Note: The two yellow solenoid wire are interchangeable
and can be connected to either the control cable
or the ground bolt on the pump.
3.5.3 Checking the 175 Amp Power Cable Fuse
If the liftgate is not operating after checking the control
box fuse, the main power cable fuse could be blown.
Check for continuity of the power cable and replace the
fuse if needed.
WARNING Electrical Arc Hazard
Disconnect the power
cable from the vehicle
battery or batteries before replacing the fuse. An
electric arc can cause personal injury or damage the
trucks electronics.
1. Disconnect the power cable from the battery.
2. Cut and remove the heat shrink tubing covering the
fuse.

Anthony Liftgates, Inc. 12 ETU Maintenance
www.anthonyliftgates.com 800-482-0003
3.5.4 Checking Motor Start Solenoid
Check the motor start solenoid by bypassing the two
terminals.
1. Use automotive 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.
3.5.5 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 or fuse is
defective and should be replaced.
3.5.6 175 Amp Fuse Replacement
CAUTION To avoid injury or property damage,
disconnect the liftgate’s power
cable from the battery before
starting to replace the fuse. An”arc” can occur resulting in
personal injury or property damage if the power cable is
connected to the battery.
1. Cut the heat shrink tube to expose the fuse, mounting
hardware, and lugs.
2. Remove the bolt, washer, and lock washer from each
end of the fuse.
3. Use the A-133607, 175 Hi-Amp Fuse Replacement Kit
for the replacement parts.
4. Slide the new heat shrink tube over one side of the
wiring.
5. Bolt the new fuse to the cable lugs using the bolts,
washers, and lock washer, as shown.
6. Slide the heat shrink tube over the fuse, hardware,
and lugs. Using a heat gun apply heat evenly to
shrink the tubing.
7. Reconnect the power cable to the battery after you
are certain liftgate area is clear.
Note: If the fuse continues to blow, contact your
authorized dealer.
4. Decals

ETU Maintenance 13 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
4.1 Installing Decals
SAFETY
INSTRUCTIONS
N
I
NG
AR To prevent possible
injuries due to improper
operation, make sure all
decals are attached to the liftgate and truck and are
legible.
1. Attach decals to the truck body, as shown.
Operationmayrequireusertostandonplatform.
Topreventinjuryordeathofoperatorsorbystanders:
•
Readandfollowoperator/ownermanualforsafety,
operation,inspection,andmaintenanceinstructions.
•
Donotplaceunstableorunsafeloadsonplatform.
•
Donotallowloadstoextendoveredgeofplatform.
•
Donotallowbodypartstocontactmovingcomponents.
•
Ensurefootingisstableandstandawayfromedge
beforeraisingorloweringplatform.
•
Owner/operatorsmustproperlymaintainliftgate.
•
Donotexceedcapacityoruseliftgateforanything
otherthanintendedpurpose.
•
Beawareofsurroundingswhenoperatingliftgate.
WARNING
A-131115
PERSONALINJURYHAZARD
NOTICE
THISLIFTGATE IS PROTECTED
WITHAN ELECTRICALOVERLOAD
CIRCUITPROTECTION DEVICE,
EITHERA CIRCUIT BREAKER, OR
AFUSE, AND IS LOCATED NEAR
THEPOWER SUPPLY
A-150238
ATU-141
A-131020
2000 lb.
1
2
3
4
5
2. Make sure factory-installed decals are attached.
A-131028
A-150601
This hydraulic reservoir is
filled with Kendall Glacial Blu
hydraulic fluid. Use ONLYthe
same or equivalent fluid.
A-131133
678910
Item Part
Number Description Qty.
1 A-131115 DECAL: WARNING, PERSONAL INJURY 1
2 ATU-423 DECAL: OPERATING INSTRUCTIONS 1
3 A-150238 DECAL: NOTICE - PROTECTED WITH ELECTRICAL OVERLOAD CIRCUIT
BREAKER 1
4 ATU-141 DECAL: POWER CUT-OFF SWITCH 1
5A-131020
ATU-174 DECAL: 2000 LB. MAXIMUM CAPACITY DECAL: 2500 LB. MAXIMUM CAPACITY 1
6 A-150601 DECAL: MADE IN THE USA 1
7 A-131147 DECAL: ANTHONY LABEL 1
8 A-131148 DECAL; EXPRESS SERIES 1
9 A-131133 DECAL: HYDRAULIC TANK FLUID 1
10 A-131028 DECAL: WELD WARNING 1
-- A-131001 DECAL: 10 AMP FUSE CHANGING PROCEDURE (attached to control wiring
in pump box) 1
1 — A-131115
PERSONAL INJURY HAZARD
Operation may require user to stand on platform.
To prevent injury or death of operators or bystanders:
Read and follow operator/owner manual for safety,
operation, inspection, and maintenance instructions.
•
Do not place unstable or unsafe loads on platform.
•
Do not allow loads to extend over edge of platform.
•
Be aware of surroundings when operating liftgate.
•
Owner/operators must properly maintain liftgate.
•
Ensure footing is stable and stand away from edge
before raising or lowering platform.
•
Do not exceed capacity or use liftgate for anything
other than intended purpose.
•
Do not allow body parts to contact moving components.
•
WARNING
A-131115

Anthony Liftgates, Inc. 14 ETU Maintenance
www.anthonyliftgates.com 800-482-0003
2 — A-131150
ANTHONY TUCKUNDER LIFTGATES
OPERATING INSTRUCTIONS
Release latch chain.
Liftgate may need to be slightly raised
to release pressure on latch chain.
1.
Reverse steps to fold and store
platform. Make sure platform is
locked in transport position with
latch chain.
6.
Manually unfold main platform.
Always stand on curbside of truck when
unfolding platform.
3.
Manually unfold flipover section.
Always stand on curbside of truck when
unfolding flipover section.
4.
Raise and lower platform using UP and DOWN
functions of control switch.
5.
Press control switch DOWN until folded platform
rests on ground.
Always stand on curbside of truck when raising or lowering
platform with control switch.
2.
A131150
3 — A-150238
NOTICE
THIS LIFTGATE IS PROTECTED
WITH AN ELECTRICAL OVERLOAD
CIRCUIT PROTECTION DEVICE,
EITHER A CIRCUIT BREAKER, OR
A FUSE, AND IS LOCATED NEAR
THE POWER SUPPLY
A-150238
4 — ATU-141
ATU-141
5 — A-131020, ATU-174
A-131020
2000 lb.
ATU-174
MAXIMUM
CAPACITY
2500 lb.
CAUTION Make sure the
proper “MAXIMUM
CAPACITY” decal is
placed on the truck for the appropriate lifting capacity
of the liftgate being installed. Do not put a higher
rated decal on a liftgate with a lower capacity; this
could result in liftgate damage or possibly personal
injury.

ETU Maintenance 15 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
6 — A-150601
A-150601
7 — A-131147
8 — A-131148
9 — A-131133
This hydraulic reservoir is
filled with Kendall Glacial Blu
hydraulic fluid. Use ONLY the
same or equivalent fluid.
A-131133
10 — A-131028
A-131028
— A-131001 (attached to control cable)
10 AMP FUSE & HOLDER
Protects against dead shorts
in this "control circuit".
If blown, pull "fuse holder
cap", replace fuse, replace
"cap". If fuse continues to
blow, contact a qualified
mechanic, "control circuit"
may be damaged.
A-131001
10 AMP FUSE & HOLDER
Protects against dead shorts
in this "control circuit".
If blown, pull "fuse holder
cap", replace fuse, replace
"cap". If fuse continues to
blow, contact a qualified
mechanic, "control circuit"
may be damaged.

Anthony Liftgates, Inc. 16 ETU Maintenance
www.anthonyliftgates.com 800-482-0003
5. Troubleshooting Chart
Troubleshooting Chart
Problem Possible Causes Possible Solution
Motor does not run when
control switch is activated.
Cab cut-off switch. Turn switch to ON position.
Truck battery. Make sure battery is fully charged.
Check for loose or corroded battery
connections.
Replace or recharge battery.
Circuit protection fuse in power cable. Replace fuse. Check the power cable
fuse. “3.5.3 Checking the 175 Amp
Power Cable Fuse” on page 11
Control box switch. If the control switch does not work:
Check the 10 Amp fuse. Replace, if fuse
is blown. If problem continues, check
for shorts in the electrical system. “3.5.1
Checking 10 Amp Control Switch Fuse”
on page 11
Check the power cable fuse. “3.5.3
Checking the 175 Amp Power Cable
Fuse” on page 11
Motor start solenoid. Check solenoid. “3.5.4 Checking Motor
Start Solenoid” on page 12
Power cable. Connect motor directly to a spare
battery. “3.5.5 Checking the Power
Cable” on page 12
Motor. If the motor is determined to be
defective, it should be replaced.
Defective motors are typically caused
by weak batteries (low Voltage), loose
connections, corrosion, or a poor
ground.
If the motor does not operate in freezing conditions, make sure the motor housing
does not contain water.
Sagging platform. Normal wear. Add shims to platform. “3.3 Mechanical
Platform Adjustment” on page 8.
Bushing wear where lift arms connect to
platform.
Replace bushings.
Structural damage. Replace damaged parts.
Foaming oil. Air in the hydraulic hose. Check oil level in reservoir. “3.4.1
Adding Fluid to Power Unit Reservoir”
on page 9.
Broken or loose fluid return tube. Remove the oil reservoir and make sure
the return tube is below the oil level.
If the tube has turned or fallen out,
reinstall it into the pump housing. Use
a center punch to “stake” the tube into
position.

ETU Maintenance 17 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
Troubleshooting Chart
Problem Possible Causes Possible Solution
Motor runs, but liftgate will not open or
lower to the ground.
Structural damage. Check clearance
between platform and dock bumpers.
Fix damage. Replace worn parts.
Flow control valve. Remove flow control valve and hook
hydraulic hose directly to the cylinder.
If the cylinder operates properly, replace
the valve. “3.4.7 Checking Flow Control
Valve” on page 11.
Motor runs, but platform will not raise,
will not raise rated capacity, or raises
but drifts down when control switch is
released.
Load capacity has been exceeded. Verify load capacity and adjust load
weight.
Structural damage. Replace damaged parts.
Low fluid level. Fill reservoir. “3.4.1 Adding Fluid to
Power Unit Reservoir” on page 9.
Low Voltage. Inspect the battery connection
terminals and check the battery’s
Voltage (9 Volts minimum).
Defective piston seals. See Maintenance section for Checking
Cylinder for Leakage. “3.4.5 Checking
Cylinder Piston Seals for Drift” on page
10.
Hydraulic pump is worn. Replace hydraulic pump.
Liftgate will not open. Platform operating area is not clear. Clear platform operating area.
Latch chain is connected. Activate the “UP” switch and release the
latch chain.
Platform lowers extremely slow. Improper oil in hydraulic reservoir. See Monthly Inspection. “3.1 Monthly
Inspection” on page 8.
Bushing wear where lift arms connect to
platform.
Replace bushings.
Damaged or kinked hydraulic hose. Repair or replace.
Cylinder rod is scored, pitted, or bent. Replace cylinder.
Flow control valve. Remove flow control valve and hook
hydraulic hose directly to the cylinder.
If the cylinder operates properly, replace
the valve. “3.4.7 Checking Flow Control
Valve” on page 11.
Platform raises partially and stops. Load capacity has been exceeded. Verify load capacity and adjust load
weight.
Structural damage. Replace damaged parts.
Low Voltage. Recharge battery (if less than 9 Volts).
Low pressure. Refill reservoir. Check pump and motor.
“3.1 Monthly Inspection” on page 8.
Platform will not lower. Platform operating area is not clear. Clear area.
Structural damage. Replace damaged parts.
Low Voltage. Recharge battery (if less than 9 Volts).
Hydraulic pump and motor. Replace power unit.

Anthony Liftgates, Inc. 18 ETU Maintenance
www.anthonyliftgates.com 800-482-0003
NOTES

Este manual en español también está disponsible en nuestro sitio Web.
ANTHONY LIFTGATES, INC.
1037 W. HOWARD ST. • P.O. BOX 615
PONTIAC, IL 61764-0615
PH: 815-842-3383
FAX: [phone]
TOLL FREE: 800-482-0003
WWW.ANTHONYLIFTGATES.COm
ETU
Form No. L-901-MM (02-19)