Anthony Liftgates SM Series User manual

Made in the USAQuality, Reliability, Customer Service Made in the USA
SM
SM-1800
SM-2500
SM-3000
Quality, Reliability, Customer Service
MAINTENANCE MANUAL

Anthony Liftgates, Inc. 2 Side Mount Maintenance
www.anthonyliftgates.com 800-482-0003
For Review Purposes Only — 03-17-2020
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.
To ensure your liftgate will perform to your expectations,
we have provided this Maintenance Manual, which is
designed to provide you with the necessary instructions
and safety precautions for the maintenance of the Side
Mount Tuckunder™ liftgate.
721
Typical Anthony Liftgates Side Mount Tuckunder Model.
Contents
1. General Information . . . . . . . . . . . . 2
1.1 Introduction . . . . . . . . . . . . . . . . . .2
1.2 General Safety . . . . . . . . . . . . . . . . 2
1.3 Serial Number Location . . . . . . . . . . . 3
1.4 Basic Instructions. . . . . . . . . . . . . . .3
1.5 If Help is Required . . . . . . . . . . . . . . 3
1.5.1 Maintenance (Dealer) . . . . . . . . . 3
1.5.2 Customer Service and
Parts (End User). . . . . . . . . . . .3
1.6 Warranty . . . . . . . . . . . . . . . . . . . 3
1.7 Replacement Parts and Hazard Decals . . . 3
2. Safety . . . . . . . . . . . . . . . . . . . . 4
2.1 Safety is Your Responsibility . . . . . . . . . 4
2.2 Safety Signal Words . . . . . . . . . . . . . 4
2.3 Safety Icons Nomenclature. . . . . . . . . .4
2.3.1 Personal Protection/Important
Information . . . . . . . . . . . . . . 4
2.3.2 Prohibited Actions . . . . . . . . . . . 4
2.4 Safety Rules . . . . . . . . . . . . . . . . . 5
2.4.1 Personal Protection . . . . . . . . . . 5
2.4.2 Equipment / Tools / Parts . . . . . . . 5
2.3.3 Hazard Avoidance . . . . . . . . . . .5
2.4.3 Battery / Fuel Tank Safety . . . . . . .6
2.4.4 Cutting Torch / Welding Safety . . . . 6
2.5 Welding or Grinding Galvanized or
Stainless Steel Material . . . . . . . . . . . 6
2.5.1 Galvanized Metal . . . . . . . . . . . 6
2.5.2 Stainless Steel. . . . . . . . . . . . .6
3. Nomenclature . . . . . . . . . . . . . . . . 7
3.2 Gravity-Down Power Unit Nomenclature . . .8
3.3 Power-Down Power Unit Nomenclature . . . 8
4. Maintenance. . . . . . . . . . . . . . . . . 9
4.1 Monthly Inspection . . . . . . . . . . . . . . 9
4.2 Semi-Annual Inspection . . . . . . . . . . . 9
4.3 Check Power Module Fluid Level . . . . . . 9
4.4 Adjusting Wheel Arm . . . . . . . . . . . . 10
4.5 Platform Adjustment . . . . . . . . . . . . 10
4.6 Replace the 200 AMP Power Cable Fuse . 11
4.7 Checking the Power Cable . . . . . . . . . 11
4.8 Checking Motor Start Solenoid and
Power Cut-off Solenoid . . . . . . . . . . . . . 11
4.9 Checking Valve Cartridge and Solenoid . . 12
4.10 Solenoid Valve Screen . . . . . . . . . . . 12
4.12.1 Power Down Models . . . . . . . . 12
4.12.2 Gravity Down Models . . . . . . . . 13
5. Decals . . . . . . . . . . . . . . . . . . . .15
5.1 Decal Placement . . . . . . . . . . . . . . 15
5.2 Decals . . . . . . . . . . . . . . . . . . . 16
6. Welding Stainless Steel to Galvanized . .18
6.1 Safety. . . . . . . . . . . . . . . . . . . . 18
6.1.1 Welding or Grinding Galvanized
Material . . . . . . . . . . . . . . . 18
6.1.2 Welding or Grinding Stainless Steel. 18
6.2 General Guidelines . . . . . . . . . . . . . 18
6.2.1 Weld Wire . . . . . . . . . . . . . . 18
6.2.2 Shielding Gas . . . . . . . . . . . . 18
6.2.3 Welding Guidelines . . . . . . . . . 18
7. Troubleshooting Chart . . . . . . . . . . .19

Side Mount Maintenance 3 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
For Review Purposes Only — 03-17-2020
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 proper maintenance. Failure to read, understand,
andfollowtheinstructionsandsafetyrecommendations
in this manual, before performing any service or
maintenance on the liftgate, can result in serious
injury or death to the service technician or bystander.
Also, read and understand the operating instructions
in the separate Operation Manual (also found in
the information packet) before beginning any
maintenance.
1.3 Serial Number Location
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
stamped into the identication plate on the side of the
power unit.
1.4 Basic Instructions
1. This liftgate should only be maintained by someone
with sufficient skills to understand the procedures
provided in this manual, along with the use of any
equipment or tools used to maintain the liftgate.
2. This manual provides easy-to-follow instructions,
along with illustrations. Safety precautions have been
clearly identified throughout each section of this
manual and must be followed.
3. A complete explanation of the safety terminology and
recommendations are included in section “2. Safety”
on page 4 of this manual and should be read
thoroughly before proceeding.
4. We urge the service technician to call our qualified
personnel if you have questions.
1.5 If Help is Required
1.5.1 Maintenance (Dealer)
For additional information, refer to the Anthony Liftgates
website www.anthonyliftgates.com to nd the most
current version of the reference material.
If you have any doubts or questions about maintenance,
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
1.5.2 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
code to nd the nearest authorized service location.
1.6 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.
NOTICE The liftgate must be maintained
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, written
permission must be obtained from Anthony Liftgates.
2. All decals must be attached and legible, or all
warranties are void.
1.7 Replacement Parts and Hazard Decals
To order replacement parts or hazard/informational
decals, contact us through your normal dealer channels.
SAFETY
INSTRUCTIONS
Being unaware of safety
recommendations can
lead to personal injury.
The service technician must make sure all decals are
attached to any replacement parts and the truck and
are clearly legible.

Anthony Liftgates, Inc. 4 Side Mount Maintenance
www.anthonyliftgates.com 800-482-0003
For Review Purposes Only — 03-17-2020
2. Safety
2.1 Safety is Your Responsibility
It is the responsibility of the maintenance personnel to
understand proper operating procedures. Be aware of the
inherent dangers in the use of this product and the tools
used to maintain it. Read and understand all Warnings,
Cautions, Notices, Safety Instructions, and Notes in this
manual, on the liftgate, or on the truck.
Accidents can often be avoided by being alert and
recognizing potentially hazardous situations. The safety
information in this manual serves as a basic guide in an
attempt to prevent injury or death.
Anthony Liftgates cannot anticipate every possible
circumstance that might involve a potential hazard. The
warnings in this manual and on the product itself are,
therefore, not all-inclusive. If tools, procedures, work
methods, or operating techniques are used that are not
specically mentioned by Anthony Liftgates, you must
satisfy yourself that they are safe for you and for others.
DO NOT proceed with any maintenance procedure
if doubt arises about the correct or safe method of
performing any procedure found in this manual. If you
have any doubts or questions, call your authorized dealer.
2.2 Safety Signal Words
Personal injury hazards are identied by the
“Safety Alert Symbol” and followed by a signal
word such as WARNING or CAUTION to indicate
the severity of the hazard.
This safety alert icon surrounds an image showing
a specic type of injury which should be avoided.
These icons are shown in “2.3.3 Hazard
Avoidance” on page 5.
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.
2.3 Safety Icons Nomenclature
This manual and the equipment have numerous safety
icons. These safety icons provide important operating
instructions, which alert you to potential personal injury
hazards.
2.3.1 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
Properly installed parts
OEM
OEM
OEM parts
N
I
NG
AR
Damaged safety sign
2.3.2 Prohibited Actions
Do not alter or modify
Do not weld
No smoking
No open flame
No alcohol
No drugs

Side Mount Maintenance 5 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
For Review Purposes Only — 03-17-2020
2.3.3 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
2.4 Safety Rules
2.4.1 Personal Protection
WARNING Do not work under the lift-
gate while it is in a raised
position. Unintentional
lowering of the liftgate can cause serious 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.
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 serious crushing injury.
Always use/set the truck’s parking brake
and remove the ignition key before
servicing the liftgate. Failure to follow
this recommendation can result in injury.
Do not place hands or feet in pinch points.
Do not place your feet under the liftgate or
between the platform and floor extension.
To prevent injury, the liftgate and its related
components should only be maintained by a
qualified installer having knowledge and skill in
using a lifting device, a cutting torch, and welding
equipment.
N
I
NG
AR To prevent possible injuries due to improper
operation, make sure all decals are attached to
the liftgate and/or truck and are legible at all
times.
2.4.2 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,
you should immediately stop and remedy the
problem before continuing.
Make sure the liftgate or truck will not be
damaged or made unsafe by the maintenance
or use of the liftgate.
Never secure the power cable to anything
which allows it to contact sharp edges, other
wiring, 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 and/or component
damage resulting in loss of vehicle control, serious
injury, or even death.
CAUTION OEM
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. If non-OEM replacement parts are
used, the warranty will be voided.

Anthony Liftgates, Inc. 6 Side Mount Maintenance
www.anthonyliftgates.com 800-482-0003
For Review Purposes Only — 03-17-2020
2.4.3 Battery / Fuel Tank Safety
WARNING To prevent
serious
bodily injury,
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
cause an explosion of combustible materials, resulting
in serious injury or death.
2.4.4 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/or local regulations when using
an arc welder, mig welder, or cutting torch. Also,
follow all manufacturers’ safety guidelines. If other
people are present during the maintenance of the
liftgate, make sure the assembly area is shielded 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, except the adapter frame tube. 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.
2.5 Welding or Grinding Galvanized or
Stainless Steel Material
2.5.1 Galvanized Metal
CAUTION
Follow all OSHA and other workplace safety standards
when welding galvanized steel, which creates zinc
oxide fumes. Always grind the coating off in the area
to be welded and provide adequate ventilation to
avoid breathing the fumes.
Always wear proper breathing protection when
grinding or welding. Use ventilation or vacuum
systems to remove any contaminated air from the
work area.
Metal Fume Fever:
When zinc vapor mixes with the oxygen in the air,
it reacts instantly to become zinc oxide, which is
non-toxic and non-carcinogenic.
Zinc oxide that is inhaled is absorbed and
eliminated by the body without complications or
chronic effects.
Exposure to zinc oxide fumes causes a flu-like
illness called metal fume fever.
Symptoms include headache, fever, chills,
muscle aches, nausea, vomiting, weakness, and
tiredness.
There are no long-term health effects. Metal fume
fever typically begins about four hours after
exposure, and full recovery occurs within 48
hours.
2.5.2 Stainless Steel
Follow all OSHA and other workplace safety standards
when welding stainless steel, which creates hexavalent
chromium fumes that can irritate the nose, throat, and
lungs.
Repeated or prolonged exposure can damage the
mucous membranes of the nasal passages and
result in ulcers. In severe cases, exposure causes
perforation of the septum (the wall separating the
nasal passages).
Always wear proper breathing protection when
grinding or welding. Use ventilation or vacuum
systems to remove any contaminated air from the
work area.

Side Mount Maintenance 7 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
For Review Purposes Only — 03-17-2020
3. Nomenclature
3.1 Liftgate Nomenclature
Mounting
Plates
Frame Rail
Mounting Brackets
Frame Rail
Reinforcement
Channels
Informational
Packet
Radius Arm
Wheel Arm
Adapter Frame Tube
Main Platform Section
Power Unit
Frame Reinforcement
Channel End Brackets
Angle Iron Braces
Floor Extension
Assembly
Platform Installation
Brackets
Transport
Latch Pin
Lift Frame
Flipover Section
723

Anthony Liftgates, Inc. 8 Side Mount Maintenance
www.anthonyliftgates.com 800-482-0003
For Review Purposes Only — 03-17-2020
3.2 Gravity Down Power Unit Nomenclature
724
Power Cable w/
200 Amp Fuse
Breather
Tube
Hydraulic
Cylinder
Power UP
High-Pressure
Hose
Flow Control
Valve
Control
Switch
Electric
Motor
Pump
Adjustable Relief
Valve
Motor Start
Solenoid
Power UP
Valve
Fill Port and
Breather
Cap
Reservoir
10 Amp In-Line Fuse
(BLACK wire)
(WHITE wire)
(GREEN wire)
3.3 Power Down Power Unit Nomenclature
7
2
5
Power Cable w/
200 Amp Fuse
Hydraulic
Cylinder
Control
Switch
Electric
Motor
Power UP
ValvePower DOWN
Valve
Fill Port and
Breather Cap
Reservoir
Power UP
High-Pressure
Hose
Flow Control
Valve
Power DOWN
High-Pressure
Hose
Motor Start
Solenoid
Pump
Adjustable
Relief
Valves
10 Amp In-Line Fuse
(BLACK wire)
(WHITE wire)
(RED wire)
(GREEN wire)

Side Mount Maintenance 9 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
For Review Purposes Only — 03-17-2020
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, “4.5
Platform Adjustment” on page 10.
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. Refer to section “4.3 Check
Power Module Fluid Level” on page 9. 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
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.
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 uid.
If the oil in the hydraulic tank is dirty, drain the oil and
ush the entire system. Rell 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”

Anthony Liftgates, Inc. 10 Side Mount Maintenance
www.anthonyliftgates.com 800-482-0003
For Review Purposes Only — 03-17-2020
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.
4.4 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 in front of the
platform 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 a 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.
2. Lengthen or shorten the wheel and channel assembly
on the tube, as desired.
7
64
3. Align the two holes in the wheel and channel
assembly with the holes in the tube nearest the
desired position.
4. Re-install the two bolts and nuts. Tighten the nuts to
secure the wheel and channel assembly.
4.5 Platform Adjustment
The ramp (outboard) end of the platform should be 1/2 to
3/4 inches higher than the truck oor when in the raised
position. If the outboard end of the platform is sagging,
add shims as described below. Shimming is a normal
procedure as the liftgate ages, and the parts become worn.
1/2" to 3/4"
1. The front edge of the flip-over platform section should
lower to the ground and contact the ground at the
points seen below, and the back of the platform should
raise flush to the floor extension. If the front edge does
not touch the ground, refer to the next step.
2. If the end of the platform does not contact the ground,
adding a shim to the stop block will raise the outboard
end of the flip-over section.
Removing material from the stop blocks will lower the
outboard end of the ip-over section.
ALI-00413
Note: One shim can move the ramp end of the
platform as much as 1/2 inch.
d. Raise and lower the platform to recheck its
position.
e. Weld the steel shim plates to the blocks on the
platform.

Side Mount Maintenance 11 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
For Review Purposes Only — 03-17-2020
3. To lower 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.
4.6 Power Cable Fuse - 200 Amp
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.
200A
200A
200A
200A
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-133610, 200 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 the platform area is clear.
Note: If the fuse continues to blow, contact your
authorized dealer.
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 Motor Start Solenoid and Power
Cut-off Solenoid
2
1
ALI-00592
Motor start solenoid.
2
1
ALI-00695
Power cut-off solenoid.
Both the motor start solenoid and power cut-off solenoid
can be checked by bypassing the solenoid itself.
1. Use 12 Volt jumper cables for this test.
2. Connect one jumper cable to the battery side of the
solenoid. Connect the other cable to the motor side
of the solenoid.
3. If the liftgate is activated, the solenoid is defective
and should be replaced. Replacement part — ATU‑120
(motor start solenoid) or A-150263 (power cut-off
solenoid).

Anthony Liftgates, Inc. 12 Side Mount Maintenance
www.anthonyliftgates.com 800-482-0003
For Review Purposes Only — 03-17-2020
4.9 Checking 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 power
down valve solenoid.
593
3. Momentarily activate the control switch in the DOWN
position. The screwdriver should be attracted to the
magnetic field created by the solenoid.
4. Repeat the process to check the power up solenoid.
Momentarily activate the control switch in the UP
position.
5. If no magnetic pull is produced, the solenoid is
defective and should be replaced. If the solenoid is
activated, check the cartridge valve.
6. Remove the solenoid from the valve assembly.
Replacement part — A-176315.
7. Remove the valve cartridge from the pump body.
Replacement part — A-130216 (lowering valve) or
A-130215 (raising valve).
8. Clean the cartridge and blow it dry with compressed
air (not greater than 30 psi). Also, blow out the pump
body.
9. 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.
20a
4.10 Solenoid Valve Screen
29a
If the solenoid is working electrically, check the debris
screen and clean if dirty.
4.11 Replacing the Solenoid Valve
594
4
3
2
1
28a
1. While installed in the pump, remove nut (1).
2. Remove coil (2) from cartridge (3).
3. Remove cartridge (3) from pump body.
4. O-ring (4) is not required on current models and can
be discarded.
4.12 Checking Cylinder Piston Seals
4.12.1 Power Down Models
1. First, check the lowering valve. Make sure it is
operating correctly, and the valve is not sticking or
dirty. Replace the valve if necessary. Refer to “4.9
Checking Valve Cartridge and Solenoid” on page 12.
2. Raise the platform approximately 12 inches off of the
floor.

Side Mount Maintenance 13 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
For Review Purposes Only — 03-17-2020
3. Place a floor jack securely under the platform to
support its full weight. An overhead lifting device
could also be used.
4. Raise the floor jack until the platform begins to raise
slightly.
5. Disconnect the white wire from the motor start
solenoid. Place electricians tape around the end
of the wire to prevent it from making a ground
connection.
White wire to
motor start
solenoid
759a
6. With the platform securely supported by the lifting
device, activate the control switch in the DOWN
position and hold the switch for 15 seconds. This will
release any pressure in the power down hose.
7. Now activate the control switch in the UP position and
hold it for 15 seconds. This will release any pressure
in the power up hose.
8. Repeat holding the control switch in the DOWN
position for 15 seconds and again in the UP position
for 15 seconds. This should release any trapped
pressure.
9. Carefully remove the flow control valve from the rod
end of the cylinder. Plug or cap the fitting.
10. Remove the hose from the cap end of the cylinder
and attach a temporary hose to catch any potential
leakage from the cylinder. Place the end of the hose
in a minimum one gallon container.
11. Lower the floor jack or lifting device.
12. Major seal damage will be apparent right away as
the platform would begin to slowly lower and fluid will
come out of the hose. Less extensive damage may
take longer to be seen. Allow the platform to sit for
several hours or overnight.
WARNING Make sure nothing or no
one could accidentally go
under the platform while
the hoses are disconnected.
13. If the platform does not lower, the seals are not the
problem, most likely it is a faulty lowering valve.
14. Reconnect the white wire to the motor start termial.
Raise and lower the platform several times to
remove any trapped air.
4.12.2 Gravity Down Models
1. Completely raise the platform.
WARNING Do not stand under the
platform.
2. Remove breather tube from the cap end of the
cylinder and attach a short piece of hose routed into a
hand-held container.
3. Activate the control switch in the UP position.
4. If oil is continuously pumped out of the hose, replace
the cylinder.
4.13 Checking System Pressure
For gravity down systems, there is only one relief valve
(power up). Power down models have two relief valve
settings; one for raising the platform (power up, upper
adjusting screw) and one for lowering the platform (power
down, lower adjusting screw).
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.
725a
Power UP Model Pressure Hose Shown
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 Power Down
1800 2800 psi
350 psi2500 1850 psi
3000 2400 psi

Anthony Liftgates, Inc. 14 Side Mount Maintenance
www.anthonyliftgates.com 800-482-0003
For Review Purposes Only — 03-17-2020
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. To adjust the pressure, loosen the lock nut and
turn Allen screw clockwise to increase pressure or
counterclockwise to decrease the pressure. Retighten
locknut, and retest the pressure setting.
Note: To rest the pressure from zero, turn the
adjusting screw in all the way, then back out
one full turn. Retighten lock nut, test liftgate
with load. If liftgate performs well, set pump
pressure according to factory settings.
8
5
8
857
7
6. Check the “power down” relief valve pressure in the
same way as the “power up” by installing a T-fitting
and pressure gauge in the power down port.
4.14 Checking Flow Control Valve
856
If the cylinder does not operate or operates slower than
normal, remove the ow control valve and hook the
hydraulic hose directly to the cylinder. If the cylinder
operates properly, replace the ow control valve.
Replacement part — A-130102.
WARNING Do not operate the liftgate
without the flow control
valve. Serious injury or
death could result if this action is not followed.
4.15 Control Switch Fuse - 10 Amp
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 with A-150438 10A Fuse.
ALI-00596
ALI-00597

Side Mount Maintenance 15 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
For Review Purposes Only — 03-17-2020
4.16 Reattaching Control Unit Wires to
Appropriate Terminals
If the control cable wires have been removed, reattach
them to the appropriate terminals, as shown.
1. Power down models:
10 Amp In-Line
Fuse (black wire) to
power cable post
Yellow DOWN
solenoid wire to
green control
switch wire
Yellow UP
solenoid wire to
red control switch
wire
White wire to
motor start
solenoid
Connect to
ground terminal
on pump body
759
2. Gravity down models:
Breather
Tube
Control
Box Wiring
Electric
Motor
Motor Start
Solenoid
10 Amp In-Line Fuse
(BLACK wire) to power cable post
WHITE wire to
motor start solenoid
Connect to Ground
Terminal on Pump Body
Yellow UP solenoid
wire to green control
switch wire
5. 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.
5.1 Decal Placement
1. Attach decals 1 through 5 to the truck body, as
shown.
1
2
3
4
5
2. Make sure factory-installed decals 6 through 10 are
attached to the lift arms and platform.
7 8 6 9 10
730
3. Make sure factory-installed decals 11 through 13 are
installed on the power unit. Decal 14 is only attached
to galvanized liftgates on the adapter frame tube.
10AMPFUSE&HOLDER
Protectsagainstdeadshorts
inthis"controlcircuit".
Ifblown,pull"fuseholder
cap",replacefuse,replace
"cap".Iffusecontinuesto
blow,contactaqualified
mechanic,"controlcircuit"
maybedamaged.
FUSIBLEDE10AMPERIOS Y
SOPORTE-Protegecontra
cortocircuitosfrancoseneste“circuito
decontrol”.Sielfusiblesequemó,
quitela“tapadelsoportedelfusible”,
cambieelfusibleyvuelvaacolocarla
“tapa”.Sielfusiblecontinúa
quemándose,comuníqueseconun
mecánicocalificado,dadoqueel
“circuitodecontrol”podríaestardañado.
A-131001-C
Welding on galvanized and stainless
steel parts gives off especially
hazardous fumes.
• Remove galvanizing from area to weld.
• Provide good ventilation.
• Wear suitable respirator. A-131125
This hydraulic reservoir is
filled with Dextron ATF
hydraulic fluid. Use ONLY the
same or equivalent fluid.
A-131134
A-131028
12
11
13
14
728

Anthony Liftgates, Inc. 16 Side Mount Maintenance
www.anthonyliftgates.com 800-482-0003
For Review Purposes Only — 03-17-2020
5.2 Decals
1 — A-131115
2 — ATU-423
3 — A-150238
4 — ATU-141
5 — ATU-175, ATU-174, ATU-147
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.

Side Mount Maintenance 17 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
For Review Purposes Only — 03-17-2020
6 — A-131034
7 — ATU-143
ATU-143
SECURE LATCH
WHILE IN TRANSIT
8 — A-131017
9 — A-150601
10 — ATU-146
ATU-146
11 — A-131028
12 — A-131133
This hydraulic reservoir is
filled with Kendall Glacial Blu
hydraulic fluid. Use ONLY the
same or equivalent fluid.
A-131133
13 — A-131001 (attached to control cable)
14 — A-131125 (only on galvanized liftgates)

Anthony Liftgates, Inc. 18 Side Mount Maintenance
www.anthonyliftgates.com 800-482-0003
For Review Purposes Only — 03-17-2020
6. Welding Stainless Steel to Galvanized
If the maintenance requires welding galvanized steel
parts to stainless steel, special procedures must be
followed to ensure the safety of the welder and the
integrity of the welds.
6.1 Safety
6.1.1 Welding or Grinding Galvanized Material
CAUTION
Follow all OSHA and other workplace safety standards
when welding galvanized steel, which creates zinc
oxide fumes. Always grind the coating off in the area
to be welded and provide adequate ventilation to
avoid breathing the fumes.
Always wear proper breathing protection when
grinding or welding. Use ventilation or vacuum
systems to remove any contaminated air from the
work area.
Metal Fume Fever:
When zinc vapor mixes with the oxygen in the air,
it reacts instantly to become zinc oxide, which is
non-toxic and non-carcinogenic.
Zinc oxide that is inhaled is absorbed and
eliminated by the body without complications or
chronic effects.
Exposure to zinc oxide fumes causes a flu-like
illness called metal fume fever.
Symptoms include headache, fever, chills,
muscle aches, nausea, vomiting, weakness, and
tiredness.
There are no long-term health effects. Metal fume
fever typically begins about four hours after
exposure, and full recovery occurs within 48
hours.
6.1.2 Welding or Grinding Stainless Steel
Follow all OSHA and other workplace safety standards
when welding stainless steel, which creates hexavalent
chromium fumes that can irritate the nose, throat, and
lungs.
Repeated or prolonged exposure can damage the
mucous membranes of the nasal passages and
result in ulcers. In severe cases, exposure causes
perforation of the septum (the wall separating the
nasal passages).
Always wear proper breathing protection when
grinding or welding. Use ventilation or vacuum
systems to remove any contaminated air from the
work area.
6.2 General Guidelines
1. Welders should position themselves upwind of the
airflow that removes the fumes so that fumes and
dust do not collect inside the welding shield (helmet).
2. In addition to proper positioning, an effective method
to prevent inhaling zinc oxide fumes or hexavalent
chromium fumes is to wear a good fume-rated
respirator.
6.2.1 Weld Wire
We recommend AWS E312T1 ux core wire, such as
Midalloy Mastercor™ E312T1-1/4 or equivalent.
Do not use stainless steel weld wire.
6.2.2 Shielding Gas
100% CO2or 75/25 Argon/CO2mix can be used.
6.2.3 Welding Guidelines
1. The welding of galvanized steel is the same as
welding bare steel of the same composition. It uses
the same welding processes, Volts, amps, travel
speed, etc.
Wire
Diameter
(inches)
Voltage
(V)
Amperage (Amp)
[Wire Feed Speed (ipm)]
Flat Vertical & Overhead
.045 24-28 130-200 [250-425] 120-160 [225-300]
.062 25-30 180-250 [150-250] 180-220 [150-200]
2. Use a soft disc grinder to remove the galvanized
coating in the area to be welded. This will improve
weld quality and reduce the welder’s exposure to zinc
oxide fumes.
3. No preheating of the dissimilar metals is needed.
4. When welding is complete, and after the area has
cooled, use a cold galvanizing spray to restore
corrosion resistance.

Side Mount Maintenance 19 Anthony Liftgates, Inc.
800-482-0003 www.anthonyliftgates.com
For Review Purposes Only — 03-17-2020
7. 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.
Replacement part — A‑150031
Optional power cut‑off solenoid. Check solenoid. “4.8 Checking Motor
Start Solenoid and Power Cut‑o
Solenoid” on page 11.
Replacement part — A‑150263
Dead battery. Make sure battery is fully charged.
Check for loose or corroded battery
connections. Replace or recharge
battery.
Circuit protection (200 Amp fuse). Replace fuse. Refer to “4.6 Power Cable
Fuse ‑ 200 Amp” on page 11.
Replacement part — A‑133610.
Control switch (10 Amp) fuse is blown. Replace the fuse inside power unit box.
If problem continues, check for shorts
in the electrical system. “4.15 Control
Switch Fuse ‑ 10 Amp” on page 14
Replacement part — A‑150438.
Battery cable. Inspect main power cable from
batteries, to circuit breakers, to cut‑off
switch to power unit. To verify a faulty
cable, connect motor directly to a spare
battery using the procedure in the
Maintenance section.
Replacement part — A‑133604
Corroded or loose wire connections. Check all wire connections on power
unit for corrosion or looseness. Replace
defective terminals with ‘heat shrink’
factory type terminals.
Motor start solenoid. Check solenoid. “4.8 Checking Motor
Start Solenoid and Power Cut‑o
Solenoid” on page 11.
Replacement part — ATU‑120.
Power unit 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.
Replacement part — A‑150018
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. “4.5 Platform
Adjustment” on page 10.
Replacement part — ATU‑071 SHIM, 14GA
Bushing wear where lift arms connect to
platform.
Replace bushings. Refer to separate
Parts Manual.
Structural damage. Replace worn parts. Refer to separate
Parts Manual.

Anthony Liftgates, Inc. 20 Side Mount Maintenance
www.anthonyliftgates.com 800-482-0003
For Review Purposes Only — 03-17-2020
Troubleshooting Chart
Problem Possible Causes Possible Solution
Foaming oil. Air in the hydraulic hose(s) or cylinder. Fill reservoir with proper fluid. Refer
to “4.1 Monthly Inspection” on page
9 for oil specications and “4.3
Check Power Module Fluid Level” on
page 9 for oil level. Raise and lower
platform several times to remove any
trapped air.
Filter screen. Filter screen in pump reservoir is
damaged or plugged with dirt. Replace
filter screen.
Replacement part — A‑150016.
Broken or loose fluid return tube. Remove oil reservoir and make sure
return tube is below oil level. If tube
has turned or fallen out, reinstall it into
the pump housing. Use a center punch
to “stake” tube into position.
Replacement part — A‑150015
Motor runs, but liftgate will not open or
platform will not lower to the ground.
Structural damage. Check clearance
between platform and floor extension.
Fix damage. Replace worn parts. Refer
to the separate Parts Manual.
Latch pin. Slide the latch pin to the open position.
Lowering valve solenoid (power down
models only).
Check the solenoid. “4.9 Checking Valve
Cartridge and Solenoid” on page 12.
Replacement part — A‑176315.
Lowering valve cartridge (power down
models only).
With platform on ground, check, remove,
and clean valve cartridge using the
procedure in section “4.9 Checking Valve
Cartridge and Solenoid” on page 12. If
plunger will not move freely, replace.
Replacement part — A‑130216.
Cylinder seals. Cylinder piston seal are damaged
allowing fluid to leak past piston when
trying to raise platform. Replace the
cylinder, repair is not practical. Refer to
section “4.12 Checking Cylinder Piston
Seals” on page 12.
Replacement part — A‑130113 Cylinder
3” or A‑130114 Cylinder 4”.
Flow control valve. Remove flow control valve and hook
hydraulic hose directly to the cylinder.
If the cylinder operates properly, replace
the valve. “4.14 Checking Flow Control
Valve” on page 14.
Replacement part — A‑130102.