Air Lift LoadLifter 5000 Series User manual

Kits 57275 |88275 |89275
For maximum effectiveness and safety, please read these instructions
completely before proceeding with installation.
Watch the video
Info on next page
SERIES
Installation
Guide
TM
MN-1047 • (011704) • ERN 8631 Failure to read these instructions can result in an incorrect installation.
2001-10 Chevrolet/GMC 2500/3500

IDENTIFYING THE DIFFERENCES BETWEEN KITS
Should you need to contact Air Lift customer service, you will need to know which kit you are inquiring about:
standard LoadLifter 5000, LoadLifter 5000 Ultimate or LoadLifter 5000 Ultimate Plus. The kits are easily
identifiable by looking at the roll plates and air lines.
 Standard LoadLifter 5000 — Zinc-plated steel roll plates and black nylon air lines.
 LoadLifter 5000 Ultimate — Black powder-coated roll plates and black nylon air lines.
 LoadLifter 5000 Ultimate Plus — Stainless steel roll plates, braided stainless steel air lines, stainless steel
air spring mounting hardware.
Air Lift offers two Ultimate Plus upgrade kits:
52300 - Braided stainless steel air line and fittings.
52301 - Stainless steel roll plates, air spring mounting hardware, braided stainless steel air lines and fittings.
LoadLifter 5000 Ultimate
black powder-coated
roll plate
LoadLifter 5000 Ultimate Plus
stainless steel
roll plate
LoadLifter 5000
silver zinc-plated steel
roll plate
LoadLifter 5000 Ultimate
nylon air line
LoadLifter 5000 Ultimate PLUS
braided stainless steel air line
LoadLifter 5000
nylon air line
Video-enhanced instruction manual
Visit air-lift.co/install88275 to watch a video of this installation.

TABLE OF CONTENTS
Installation Diagram ................................... 2
Hardware and Tools Lists............................... 3
Introduction .......................................... 4
Important Safety Notice .....................................................4
Notation Explanation ........................................................4
Installing the LoadLifter 5000 Series System ..............5
Getting Started ............................................................5
Assembling the Air Spring Assembly ...........................................5
Removing the Jounce Bumper and Positioning the Assembly on the Axle ..............7
Attaching the Upper Bracket..................................................8
Aligning and Attaching the Assembly and Lower Bracket ...........................8
Installing the Emergency Brake Line Bracket and Clip ..............................9
Installing the Air Lines .................................10
Installing Nylon Air Lines ....................................................10
Installing Braided Stainless Steel Air Lines ...................................... 11
Installing the Heat Shield....................................................11
Before Operating......................................12
Checking for Leaks ........................................................12
Fixing Leaks .............................................................12
Installation Checklist .......................................................13
Post-Installation Checklist...................................................13
Product Use, Maintenance and Servicing .................14
Minimum and Maximum Pressure.............................................14
Maintenance Guidelines .................................................... 14
Tuning the Air Pressure .....................................................15
Guidelines for Adding Air. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Troubleshooting Guide .................................16
Frequently Asked Questions................................................... 16
Limited Warranty and Return Policy ......................17
Replacement Part Information ..........................17
Contact Information ...................................17

LoadLifter 5000 Series
MN-1047
2
Installation Diagram
g. 1
H
J
J OR V
K
G
L
J
I
A
J
LE
D
C
I
J
L
F
B
U, only on 2500 HD model
P
M
J
Q
O
N
L, only on 2500 HD
model
Small weld nut bracket
must be removed. Only
on 2500 HD model.
*The 3500 model has a
different style strike plate.
2500 HD model,
driver’s side shown
J

LoadLifter 5000 Series
MN-1047 3
STOP!
Hardware and Tools Lists
TOOLS LIST
Item Part# Description ............................................Qty
A 07634 Upper bracket................................................. 2
B 03633 Lower bracket................................................. 2
F 10451 Axle strap........................................................ 2
H 17108 3/8”-16 x 1.5” bolt .......................................... 4
I 17141 3/8”-16 x 2.5” Carriage bolt ........................... 4
L 18435 3/8” Nylon lock nut ....................................... 10
M 18438 5/16” Nylon lock nut....................................... 2
N 10465 5/8” Clip.......................................................... 1
O 17103 5/16” –18 x 1” Bolt ......................................... 2
Q 10421 Lower brake bracket....................................... 1
U 17101 3/8”-16 x 3/4” Bolt.......................................... 2
EE* 21234 Rubber washer ............................................... 2
TM
TM
ULTIMATE
P L U SP L U S
+
TM
Common Parts Included in All 3 Kits
TM
Item Part# Description ............................................Qty
C 58496 Air spring with internal jounce bumper........... 2
D 11880 Roll plate (stainless steel) ............................... 4
E 21815 AN type fitting................................................. 2
G 17284 3/8”-24 x 7/8” Stainless steel bolt.................. 4
J 18444 3/8” Flat washer ........................................... 19
V 18507 3/8” Stainless steel flat washer ...................... 4
K 18504 3/8” Stainless steel lock washer..................... 4
P 17363 3/8”-24 x 3/4” Stainless steel flat-head screw .... 4
AA* 20987 Stainless steel braided air line........................ 2
BB* 10466 Zip tie............................................................ 12
HH* 21709 Fill valve with cap & nut .................................. 2
DD* 18572 M8 Stainless steel flat washer ....................... 2
FF* 18623 Stainless steel star washer............................. 2
II* 21813 PTC to AN adapter fitting .................................. 2
JJ* 20084 Air line assembly............................................. 1
Item Part# Description ............................................Qty
C 58437 Air spring ........................................................ 2
D 11951 Roll plate (silver zinc plated) ........................... 4
E 21848 Push-to-connect (PTC) fitting......................... 2
G 17203 3/8”-24 x 7/8” Bolt.......................................... 4
J 18444 3/8” Flat washer ........................................... 23
K 18427 3/8” Lock washer............................................ 4
P 17215 3/8”-24 x 3/4” Flat-head screw ...................... 4
AA* 20086 Air line............................................................. 1
BB* 10466 Zip tie.............................................................. 6
CC* 21230 Valve cap ........................................................ 2
DD* 18501 M8 flat washer ................................................ 2
GG* 21233 5/16” Hex nut ................................................. 4
FF* 18411 Star washer..................................................... 2
Unique Parts in Each Kit
Item Part# Description ............................................Qty
C 58496 Air spring with internal jounce bumper .......... 2
D 11967 Roll plate (black powder coated).................... 4
E 21848 Push-to-connect (PTC) fitting......................... 2
G 17203 3/8”-24 x 7/8” Bolt.......................................... 4
J 18444 3/8” Flat washer ........................................... 23
K 18427 3/8” Lock washer............................................ 4
P 17215 3/8”-24 x 3/4” Flat-head screw ...................... 4
AA* 20086 Air line............................................................. 1
BB* 10466 Zip tie.............................................................. 6
CC* 21230 Valve cap ........................................................ 2
DD* 18501 M8 flat washer ................................................ 2
GG* 21233 5/16” Hex nut ................................................. 4
FF* 18411 Star washer..................................................... 2
Description.................................................................. Qty
Standard and metric open-end or box wrenches ...................SET
Adjustable wrench....................................................................... 1
Ratchet ....................................................................................................1
Metric, 9/16”, and 1/2” deep-well sockets ......................................SET
3/8” and 5/16” drill bits (very sharp)............................................ 1
Heavy-duty drill ........................................................................... 1
Torque wrench............................................................................. 1
Standard and metric hex-key wrenches ..................................... 1
Hose cutter, razor blade or sharp knife ....................................... 1
Hoist or floor jacks ...................................................................... 1
Safety stands............................................................................... 2
Safety glasses ............................................................................. 1
Air compressor or compressed air source .................................. 1
Spray bottle with dish soap/water solution................................. 1
Missing or damaged parts? Call Air Lift customer
service at [phone] for a replacement part.
Missing or damaged parts? Call Air Lift customer
service at [phone] for a replacement part.
KIT 57275
KIT 88275
KIT 89275
* not pictured in the Installation Diagram

LoadLifter 5000 Series
MN-1047
4
Introduction
The purpose of this publication is to assist with the installation, maintenance and
troubleshooting of the standard LoadLifter 5000, LoadLifter 5000 Ultimate or LoadLifter
5000 Ultimate Plus air spring kits. All LoadLifter 5000 Series kits utilize sturdy,
reinforced, commercial-grade single or double, depending on the kit, convolute bellows.
LoadLifter 5000 Ultimate kits add an internal jounce bumper and black powder-coated
roll plates. LoadLifter 5000 Ultimate Plus kits also have an internal jounce bumper, but
add stainless steel roll plates, air lines and air spring mounting hardware.
The air springs are manufactured like a tire with layers of rubber and cords that control
growth. LoadLifter 5000 series kits are recommended for most 3/4- and 1-ton pickups
and SUVs with leaf springs and provide up to 5,000 pounds of load-leveling support with
air adjustability from 5-100 PSI.
It is important to read and understand the entire installation guide before beginning
installation or performing any maintenance, service or repair.
Air Lift Company reserves the right to make changes and improvements to its products
and publications at any time. For the latest version of this manual, contact Air Lift
Company at [phone] or visit airliftcompany.com.
IMPORTANT SAFETY NOTICE
The installation of this kit does not alter the gross vehicle weight rating (GVWR) or
payload of the vehicle. Check the vehicle’s owner’s manual and do not exceed the
maximum load listed for this vehicle.
Gross vehicle weight rating: The maximum allowable weight of the fully loaded vehicle
(including passengers and cargo). This number — along with other weight limits, as
well as tire, rim size and inflation pressure data — is shown on the vehicle’s Safety
Compliance Certification Label.
Payload: The combined, maximum allowable weight of cargo and passengers that the
truck is designed to carry. Payload is GVWR minus the base curb weight.
NOTATION EXPLANATION
Hazard notations appear in various locations in this publication. Information which
is highlighted by one of these notations must be observed to help minimize risk of
personal injury or possible improper installation which may render the vehicle unsafe.
Notes are used to help emphasize areas of procedural importance and provide helpful
suggestions. The following definitions explain the use of these notations as they appear
throughout this guide.
INDICATES IMMEDIATE HAZARDS WHICH WILL RESULT IN SEVERE PERSONAL
INJURY OR DEATH.
INDICATES HAZARDS OR UNSAFE PRACTICES WHICH COULD RESULT IN SEVERE
PERSONAL INJURY OR DEATH.
INDICATES HAZARDS OR UNSAFE PRACTICES WHICH COULD RESULT IN DAMAGE
TO THE MACHINE OR MINOR PERSONAL INJURY.
Indicates a procedure, practice or hint which is important to highlight.
NOTE
CAUTION
DANGER
WARNING

LoadLifter 5000 Series
MN-1047 5
GETTING STARTED
Your vehicle may be equipped with a rear brake proportioning valve. Any type of load
assist product could affect brake performance. We recommend that you check with your
dealer before installing this type of product. If your vehicle DOES NOT have a rear brake
proportioning valve or is equipped with an anti-lock type brake system, installation of a
load assist product will have NO EFFECT on brake performance.
COMPRESSED AIR CAN CAUSE INJURY AND DAMAGE TO THE VEHICLE AND PARTS
IF IT IS NOT HANDLED PROPERLY. FOR YOUR SAFETY, DO NOT TRY TO INFLATE THE
AIR SPRINGS UNTIL THEY HAVE BEEN PROPERLY SECURED TO THE VEHICLE.
1. Raise the vehicle and support the axle with jack stands, setting the jack stands as
wide as possible on the axle (Fig. 2).
2. Drop the axle or raise the frame up to make room for the assemblies to be put into
position between the frame and axle.
ASSEMBLING THE AIR SPRING ASSEMBLY
1. Set a roll plate (D) on both ends of the air spring (C). The radiused (rounded) edge of
the roll plate will be toward the air spring, enabling the air spring to be seated in both
roll plates (Fig. 3).
2. Install a 90° elbow fitting (E) to the top of the air spring. Tighten finger tight plus 1 1/2
turns. Be careful to only tighten on the metal hex nut. Do not overtighten (Fig. 3).
3. Install the upper bracket (A) onto the air spring assembly. Use slot “A” when installing
on the driver’s side and use slot “B” when installing on the passenger’s side. Attach
using two 3/8” bolts (G), lock washers (K), and flat washers (J or V). Leave the bolts
loose at this time (Figs. 3 & 4).
Installing the LoadLifter 5000 Series System
DANGER
g. 2

LoadLifter 5000 Series
MN-1047
6
4. Driver’s side only: Insert a 5/16” bolt (O) into the small hole on the lower bracket (B)
before attaching the lower bracket to the air spring assembly (Fig. 3).
5. 2500 HD models only: Install a 3/8” bolt (U) and lock nut (L) through the hole in the
lower bracket (Fig. 2) with the head of the bolt facing down. Tighten securely.
6. Insert two 3/8” carriage bolts (I) through the large holes and into the square holes of
the legs in the lower bracket (Fig. 3).
7. Attach the lower bracket (B) to the bottom of the air spring assembly using two 3/8”
flat-head screws (P). Tighten securely.
g. 4
Outboard
Inboard
Slot A Slot B
NOTE: The elbow fitting will
point toward the rear of the
vehicle on the driver’s side and
toward the front of the vehicle
on the passenger’s side.
Lower
bracket (B)
Roll plates (D)
3/8”
Carriage
bolt (I)
Elbow fitting (E)
3/8” Bolt (G)
3/8” Lock washer (K)
3/8” Flat washer (J or V)
3/8” Bolt (U)
3/8” Nylon lock nut (L)
3/8” Flat-head
screw (P)
5/16” bolt (O)
Upper
bracket (A)
g. 3
Air spring (C)

LoadLifter 5000 Series
MN-1047 7
REMOVING THE JOUNCE BUMPER AND POSITIONING
THE ASSEMBLY ON THE AXLE
1. Remove both jounce bumpers under the frame rail and discard.
On the 2500 HD models only, the driver’s side of the axle may have a small bracket with a
nut that has nothing attached to it. This bracket must be trimmed off of the axle in order to
install the assembly (Fig. 5a).
2500 HD models:
1. Set the assembly that has the cinch bolt onto the driver’s side.
It will be necessary to index the lower legs under the jounce bumper strike plate.
2. With the lower bracket parallel to the strike plate, hook one leg under the side of the
strike plate and turn the assembly until the other leg is under the strike plate on the
other side (Fig. 5b).
3. Once the legs are under the strike plate, proceed with the upper bracket instructions.
NOTE
NOTE
3500 models:
1. Set the assembly on the strike plate so that the legs of the lower bracket are forward
and behind the axle (Fig. 6).
g. 5b
With one leg hooked
under the strike plate,
turn the assembly to
hook the other leg under
the strike plate.
Top view
g. 6
Lower bracket
Strike plate
Remove nut
and bracket.
Strike plate
Lower bracket
g. 5a
The leg on the lower
bracket should hook
under the sides of the
strike plate.

LoadLifter 5000 Series
MN-1047
8
ATTACHING THE UPPER BRACKET
1. The elbow fitting points toward the rear of the vehicle on the driver’s side and toward
the front of the vehicle on the passenger’s side.
2. Insert two 3/8” bolts (H) and flat washers (J) through the existing jounce bumper
holes and through the slotted holes in the upper bracket (Fig. 7).
It may be helpful to raise the axle at this point so that the upper bracket touches the frame.
3. Attach the upper bracket using two flat washers (J) and nylon lock nuts (L) on each
previously installed bolt (Fig. 7).
4. Push the bracket inboard and tighten both upper bolts.
There should be a thumbs width between the air spring roll plate (D) and the leaf spring
U-bolt.
ALIGNING AND ATTACHING THE ASSEMBLY
AND LOWER BRACKET
1. Bring the axle all the way up and remove the jack stands previously used to support
the frame when removing the jounce bumper.
The upper bracket is slotted for forward and backward adjustment. The bottom adjusts by
moving the bracket on the axle in or out (Fig. 8).
2. Adjust the assembly so that the air spring is perpendicular to the bottom and top
mounting brackets.
3. Tighten the top mounting bolts to 20 lb.-ft. (27Nm).
g. 8
Adjust in and out
3/8” Bolt (H)
3/8” Flat washer (J)
Upper bracket
Jounce
bumper
holes
3/8” Flat washer (J)
3/8” Nylon lock nut (L)
Frame
g. 7
NOTE
NOTE
NOTE

LoadLifter 5000 Series
MN-1047 9
4. Attach the axle strap (F) to both lower bracket carriage bolts using two flat washers
(J) and two nylon lock nuts (L). Torque evenly to 16 lb.-ft. (22Nm) (Fig. 9).
INSTALLING THE EMERGENCY BRAKE LINE BRACKET
AND CLIP (DRIVER’S SIDE ONLY)
1. Attach the brake line bracket (Q) to the lower bracket using the previously installed
5/16” bolt (O) with one flat washer (J) and a nylon lock nut (M) (Fig. 1 & 10).
2. Attach the brake line clip (N) onto the emergency brake line bracket (Fig. 1 & 10).
3. Attach the clip assembly to the brake line bracket using a 5/16” bolt (O), two flat
washers (J), and a nylon lock nut (M) (Fig. 1 & 10).
4. Align the brake line bracket and clip assembly so that the two do not bind to the
cable. Tighten all mounting hardware in this assembly securely.
Be sure the cable does not rub against the air spring when it is fully inflated. If it does,
adjust the assembly accordingly.
g. 10
Brake line clip (N)
Brake line
Brake line
bracket (Q)
5/16” Bolt (O)
5/16” Flat washer (J)
Nylon lock nut (M)
g. 9
Nylon lock nut (L)
Flat washer (J)
Axle strap (F)
NOTE

LoadLifter 5000 Series
MN-1047
10
Installing the Air Lines
Air lines are routed from the air springs to Schrader valves. LoadLifter 5000 Series air
lines come in two styles: nylon and braided stainless steel. Begin by choosing locations
for the Schrader valves and drill a 5/16” hole, if necessary (Fig. 11).
KEEP AT LEAST 6” OF CLEARANCE BETWEEN ALL AIR LINES AND THE EXHAUST
SYSTEM. AVOID SHARP BENDS AND EDGES.
INSTALLING NYLON AIR LINES
1. Cut the air line in half. Make clean, square cuts with a razor blade or hose cutter
(Fig. 12). Do not use scissors or wire cutters.
2. Use zip ties to secure the air line to fixed points along the chassis. Do not pinch or kink
the air line. The minimum bend radius for the air line is 1 ” . Leave at least 2” of slack in the
air line to allow for any movement that might pull on the air line.
3. Install the Schrader valve in the chosen location (Fig. 13).
Good cut Bad cut
A. Inside fuel tank filler door C. License plate or
B. Inside rear wheel wells rear bumper area*
MICHIGAN
XXX-XXX
www.MICHIGAN.gov
A. B. C.
MICHIGAN
XXX-XXX
www.MICHIGAN.gov
If a location for the Schrader valve other than the back of
the vehicle is chosen, it may be necessary to coil the
excess air line. The braided stainless steel air line cannot
be trimmed.
A. Inside fuel
tank filler
door
C. License
plate or
B. Inside rear
wheel wells
rear bumper
area*
* For LoadLifter Ultimate Plus kits, the recommended location
for the Schrader valves is the rear bumper area or license plate.
MICHIGAN
XXX-XXX
www.MICHIGAN.gov
A. B. C.
USE IN
Standard,
Ultimate,
7500XL
USE IN
Plus
upgrade kit
USE IN
Plus combo
manuals
Hex nuts
Star washer
Rubber washer
Air Line Setup for Compressor Integration
Air Line Setup Without Compressor System
Vehicle body
or bumper
Hex nuts
Flat washer
Star washer
Rubber washer
Nylon
air line
Flat
Flat
Vehicle body
or bumper
Braided stainless steel
air line to air spring
5/16” hole
AN to PTC
fitting
Schrader
valve
Vehicle
body or
bumper
AN
Schrader
valve Air line hex nut
5/16” hole
Flat washer
Nylon air line
to air spring
Braided
stainless
steel air line
to air spring
Hex nuts
Flat washer
Star washer
Rubber washer
Schrader
valve
Vehicle
body or
bumper
5/16” hole
Nylon air line
to air spring
g. 12
g. 13
g. 11
CAUTION
Use the following 2
pages for LoadLifter
5000 Series manuals

LoadLifter 5000 Series
MN-1047 11
INSTALLING BRAIDED STAINLESS STEEL AIR LINES
KEEP THE AIR LINE AWAY FROM THE FUEL LINE, BRAKE LINES AND ELECTRICAL
WIRES.
1. Use zip ties to secure
the air line to fixed points
along the chassis every
6” to 8”. Leave at least 2”
of slack to allow for any
movement that might pull
on the air line.
2. Tighten the air line hex
nut finger tight, then use
2 wrenches to turn 1
additional flat (1/6
of one full turn). Do
not overtighten
(Figs. 14 or 15). The
easiest way to tighten the
fitting is off the vehicle.
Install the Schrader valve
in the chosen location.
3. Coil and secure any
excess air line in an
area where it will not be
susceptible to damage.
The braided stainless
steel air line cannot be
trimmed.
CAUTION
Hex nuts
Star washer
Rubber washer
Air Line Setup for Compressor Integration
Air Line Setup Without Compressor System
Vehicle body
or bumper
Hex nuts
Flat washer
Star washer
Rubber washer
Nylon
air line
Flat
Flat
Vehicle body
or bumper
Braided stainless steel
air line to air spring
5/16” hole
AN to PTC
fitting
Schrader
valve
Vehicle
body or
bumper
AN
Schrader
valve Air line hex nut
5/16” hole
Flat washer
Nylon air line
to air spring
Braided
stainless
steel air line
to air spring
Hex nuts
Flat washer
Star washer
Rubber washer
Schrader
valve
Vehicle
body or
bumper
5/16” hole
Nylon air line
to air spring
g. 14
g. 15
INSTALLING THE HEAT SHIELD
1. Attach the metal heat shield to the exhaust where it is closest to the air spring. Slide
the air line thermal sleeve over the air line and place it where the air line is closest to
the exhaust (Fig. 16).
Double up hose
clamps if necessary
Bend
tabs
1/2” dead
air space
Exhaust
resonator
Air line
thermal sleeve
g. 16

CHECKING FOR LEAKS
1. Inflate the air spring to 30 PSI.
2. Spray all connections and the inflation valves with a solution of 1/5 liquid dish soap
and 4/5 water. Spot leaks easily by looking for bubbles in the soapy water.
3. After the test, deflate the springs to the minimum pressure required to restore the
system to normal ride height. Do not deflate to lower than 5 PSI.
4. Check the air pressure again after 24 hours. A 2-4 PSI loss after initial installation is
normal. Retest for leaks if the loss is more than 5 PSI.
FIXING LEAKS
1. If there is a problem with the swivel fitting:
a. Check the air line connection by deflating the spring and removing the line by
pulling the collar against the fitting and pulling firmly on the air line. Trim 1” off
the end of the air line. Be sure the cut is clean and square (see Fig. 12). Reinsert
the air line into the push-to-connect fitting.
b. Check the threaded connection by tightening the swivel fitting another half turn.
If it still leaks, deflate the air spring, remove the fitting, and re-coat the threads
with thread sealant. Reinstall by hand tightening as much as possible and then
use a wrench for an additional two turns.
2. If there is a problem with the inflation valve:
a. Check the valve core by tightening it with a valve core tool.
b. Check the air line by removing the air line from the barbed type fitting. Cut the
air line off a few inches in front of the fitting and use a pair of pliers or vice grips
to pull/twist the air line off of the fitting.
DO NOT CUT OFF THE AIR LINE COMPLETELY AS THIS WILL USUALLY NICK THE
BARB AND RENDER THE FITTING USELESS.
3. If the preceding steps have not resolved the problem, call Air Lift customer service at
[phone].
Before Operating
LoadLifter 5000 Series
MN-1047
12
CAUTION

Clearance test — Inflate the air springs to 75-90 PSI and make sure there is at least
1/2” clearance from anything that might rub against each sleeve. Be sure to check
the tire, brakes, frame, shock absorbers and brake cables.
Leak test before road test — Inflate the air springs to 75-90 PSI and check all
connections for leaks. All leaks must be eliminated before the vehicle is road tested.
Heat test — Be sure there is sufficient clearance from heat sources, at least 6” for
air springs and air lines. If a heat shield was included in the kit, install it. If there is no
heat shield, but one is required, call Air Lift customer service at [phone].
Fastener test — Recheck all bolts for proper torque.
Road test — The vehicle should be road tested after the preceding tests. Inflate the
springs to recommended driving pressures. Drive the vehicle 10 miles and recheck
for clearance, loose fasteners and air leaks.
Operating instructions — If professionally installed, the installer should review the
operating instructions with the owner. Be sure to provide the owner with all of the
paperwork that came with the kit.
Overnight leak down test — Recheck air pressure after the vehicle has been used
for 24 hours. If the pressure has dropped more than 5 PSI, then there is a leak that
must be fixed. Either fix the leak yourself or return to the installer for service.
Air pressure requirements — It is important to understand the air pressure
requirements of the air spring system. Regardless of load, the air pressure should
always be adjusted to maintain adequate ride height at all times while driving.
Thirty-day or 500-mile test —Recheck the air spring system after 30 days or 500
miles, whichever comes first. If any part shows signs of rubbing or abrasion, the
source should be identified and moved, if possible. If it is not possible to relocate
the cause of the abrasion, the air spring may need to be remounted. If professionally
installed, the installer should be consulted. Check all fasteners for tightness.
LoadLifter 5000 Series
MN-1047 13
INSTALLATION CHECKLIST
POST-INSTALLATION CHECKLIST
INSTALLATION CHECKLIST
POST-INSTALLATION CHECKLIST

MAINTENANCE GUIDELINES
By following the steps below, vehicle owners will obtain the longest life and best results from
their air springs.
1. Check air pressure weekly.
2. Always maintain normal ride height. Never inflate beyond 100 PSI.
3. If the system develops an air leak, use a soapy water solution (1/5 liquid dish soap
and 4/5 water) to check all air line connections and the inflation valve core before
deflating and removing the air spring.
FOR SAFETY AND TO PREVENT POSSIBLE DAMAGE TO THE VEHICLE, DO NOT
EXCEED MAXIMUM GROSS VEHICLE WEIGHT RATING (GVWR), AS INDICATED BY
THE VEHICLE MANUFACTURER. ALTHOUGH THE AIR SPRINGS ARE RATED AT
A MAXIMUM INFLATION PRESSURE OF 100 PSI, THE AIR PRESSURE ACTUALLY
NEEDED IS DEPENDENT ON LOAD AND GVWR.
4. Loaded vehicles require at least 25 PSI. A “loaded vehicle” refers to a vehicle with a
heavy bed load, a trailer or both. Never exceed GVWR, regardless of air spring, air
pressure or other load assist. The springs in this kit will support approximately 40 pounds
of load (combined on both springs) for each 1 PSI of pressure. The required air pressure
will vary depending on the state of the original suspension. Operating the vehicle below
the minimum air spring pressure will void the Air Lift warranty.
5. When increasing load, always adjust air pressure to maintain normal ride height. Increase
or decrease pressure from the system as necessary to attain normal ride height for
optimal ride and handling. Remember that loads carried behind the axle (including
tongue loads) require more leveling force (pressure) than those carried directly over the
axle.
6. Always add air to springs in small quantities, checking the pressure frequently.
7. Should it become necessary to raise the vehicle by the frame, make sure the
system is at minimum pressure (5 PSI) to reduce the tension on the suspension/
brake components. Use of on-board leveling systems do not require deflation or
disconnection.
8. Periodically check the air spring system fasteners for tightness. Also, check the air
springs for any signs of rubbing. Realign if necessary.
9. On occasion, give the air springs a hard spray with a garden hose to remove mud,
sand, gravel or other debris.
NOTE
Product Use, Maintenance and Servicing
LoadLifter 5000 Series
MN-1047
14
CAUTION
5 PSI 100 PSI
Maximum Air PressureMinimum Recommended Pressure
5 PSI 100 PSI
Maximum Air PressureMinimum Recommended Pressure

LoadLifter 5000 Series
MN-1047 15
TUNING THE AIR PRESSURE
Pressure determination comes down to three things — level vehicle, ride comfort and
stability.
1. Level vehicle
If the vehicle’s headlights are shining into the trees or the vehicle is leaning to one
side, then it is not level (Fig. 17). Raise the air pressure to correct either of these
problems and level the vehicle.
2. Ride comfort
If the vehicle has a rough or harsh ride it may be due to either too much pressure or
not enough (Fig. 18). Try different pressures to determine the best ride comfort.
3. Stability
Stability translates into safety and should be the priority, meaning the driver may
need to sacrifice a perfectly level and comfortable ride. Stability issues include roll
control, bounce, dive during braking and sponginess (Fig. 19). Tuning out these
problems usually requires an increase in pressure.
GUIDELINES FOR ADDING AIR
1. Start with the vehicle level or slightly above.
2. When in doubt, always add air.
3. If the front of the vehicle dives while braking, increase the pressure in the front air bags,
if equipped.
4. If it is ever suspected that the air bags have bottomed out, increase the pressure (Fig. 20).
5. Adjust the pressure up and down to find the best ride.
6. If the vehicle rocks and rolls, adjust the air pressure to reduce movement.
7. It may be necessary to maintain different pressures on each side of the vehicle.
Loads such as water, fuel, and appliances will cause the vehicle to be heavier on one
side (Fig. 21). As much as a 50 PSI difference is not uncommon.
Bad headlight aim Sway and
body roll
Rough ride
g. 17 g. 19 g. 18
Bottoming out Unlevel Level
g. 20 g. 21

Troubleshooting Guide
LoadLifter 5000 Series
MN-1047
16
PROBLEM CAUSE SOLUTION
System won’t maintain pressure
overnight.
Improperly installed air line, air line has
holes or cracks.
Leak test the air line connections, the
threaded connection into the air spring, and all
fittings in the control system.
Air spring or air line leak. Fitting seal or air line is compromised. Check to make sure air lines are seated in
connectors. Inspect fittings with soapy water.
Trim hose or re-seal fitting. Ensure lines are
cut straight.
Corner won't raise or air leak
develops.
Look for a kink or fold in the air line. Replace any air line that has been kinked.
PROBLEM CAUSE SOLUTION
System won’t maintain pressure
overnight.
Improperly installed air line, air line has
holes or cracks.
Leak test the air line connections, the
threaded connection into the air spring, and all
fittings in the control system.
Air spring or air line leak. Fitting seal or air line is compromised. Check to make sure air lines are seated in
connectors. Inspect fittings with soapy water.
Trim hose or re-seal fitting. Ensure lines are
cut straight.
Corner won't raise or air leak
develops.
Look for a kink or fold in the air line. Replace any air line that has been kinked.
FREQUENTLY ASKED QUESTIONS
Q. Will installing air springs increase the weight ratings of a vehicle?
No. Adding air springs will not change the weight ratings (GAWR, GCWR and/
or GVWR) of a vehicle. Exceeding the GVWR is dangerous and voids the Air Lift
warranty.
Q. Is it necessary to keep air in the air springs at all times and how much pressure
will they need?
For LoadLifter 5000 standard, Ultimate and Ultimate Plus, the recommended
minimum air pressure is 5 PSI, but it can safely be run at zero air pressure unladen
(no load).
Q. Is it necessary to add a compressor system to the air springs?
No. Air pressure can be adjusted with any type of compressor as long as it can
produce sufficient pressure to service the springs. Even a bicycle tire pump can be
used, but it’s a lot of work.
Q. How long should air springs last?
If the air springs are properly installed and maintained they can last indefinitely.
Q. Will raising the vehicle on a hoist for service work damage the air springs?
No. The vehicle can be lifted on a hoist for short-term service work such as tire
rotation or oil changes. However, if the vehicle will be on the hoist for a prolonged
period of time, support the axle with jack stands in order to take the tension off of the
air springs.

LoadLifter 5000 Series
MN-1047 17
Replacement Part Information
If replacement parts are needed, contact the local dealer or call Air Lift customer service at
[phone]. Most parts are immediately available and can be shipped the same day.
Contact Air Lift Company customer service at [phone] first if:
• Parts are missing from the kit.
• Need technical assistance on installation or operation.
• Broken or defective parts in the kit.
• Wrong parts in the kit.
• Have a warranty claim or question.
Contact the retailer where the kit was purchased:
• If it is necessary to return or exchange the kit for any reason.
• If there is a problem with shipping if shipped from the retailer.
• If there is a problem with the price.
Contact Information
Mailing address P.O. Box 80167
Lansing, MI 48908-0167
Shipping address 2727 Snow Road
for returns Lansing, MI 48917
Phone Toll free: [phone]
International: [phone]
Email [e-mail]
Web address www.airliftcompany.com
Limited Warranty and Return Policy
Air Lift Company provides a limited lifetime warranty to the original purchaser of its
Load Support products, that the products will be free from defects in workmanship
and materials when used on cars and trucks as specified by Air Lift Company and
under normal operating conditions, subject to the requirements and exclusions set
forth in the full Limited Warranty and Return Policy that is available online at
www.airliftcompany.com/warranty.
For additional warranty information contact Air Lift Company customer service.

Need Help?
Contact Air Lift Company customer service department by calling (800)
248-0892.
For calls from outside the USA or Canada,
dial [phone].
Need Help?
Contact Air Lift Company Customer Service at [phone]
or email [e-mail].
For calls outside the U.S. or Canada, dial [phone].
JJC-0417
Thank you for purchasing Air Lift Products — the professional Installer's choice!
Air Lift Company • 2727 Snow Road • Lansing, MI 48917 or P.O. Box 80167 • Lansing, MI 48908-0167
Printed in the USA