Air Lift Load Controller II 25812 User manual
For maximum effectiveness and safety,
please read these instructions completely
before proceeding with installation.
Failure to read these instructions can result in an
incorrect installation.
INSTALLATION GUIDE
Kit 25812
5 psi Low Pressure
Sensor (Dual Gauge)
™
Introduction ....................................... 2
Important Safety Notice .............................................2
................................................2
Installation Diagram ................................3
Hardware List .....................................................3
Installing the Load Controller II System ................4
Getting Started ....................................................4
..................................4
Step by Step Installation .............................................5
Warranty and Returns Policy .........................8
Replacement Information ............................9
Contact Information ................................9
TABLE OF CONTENTS
1
2MN-337
Introduction
compressor system.
It is important to read and understand the entire installation guide before beginning installation
or performing any maintenance, service or repair.The information here includes a hardware
list and step-by-step installation information.
www.airliftcompany.com for the latest version of this manual.
IMPORTANT SAFETY NOTICE
listed for your vehicle.
Gross Vehicle Weight Rating: The maximum allowable weight of the fully loaded vehicle
Payload:
NOTATION EXPLANATION
Hazard notations appear in various locations in this publication.Information which is
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
Indicates a procedure, practice or hint which is important to highlight.
DANGER
NOTE
WARNING
CAUTION
Load Controller II
3
MN-337
Installation Diagram
Check valves
Low pressure
sensors
Harness #2
Harness #1
Panel Assembly
Fuse box
Air springs
(previously installed)
Power wire
Power wire
Fuse adapter
In line
15 AMP fuse
Firewall
Grommet
Ground
Compressor
Adapter #1
Adapter #2
Adapter #3 *
Adapter
Fuse
* Uses 3/16 (smaller) Female Push On Connector
g. 1
Item Part # Description................................Qty
..................................
............................
................................
...................................
...................................
Item Part # Description...............................Qty
......................................
H 24542 Fuse .............................................
I 24543 Fuse .............................................
................................
.....................................
HARDWARE LIST
Load Controller II
4MN-337
Installing the Load Controller II System
GETTING STARTED
This part of the installation should be done after the air spring kit is installed.If you
have any questions, please call Air Lift customer service at (800) 248-0892.
to the low pressure sensor are necessary.If you are adding this control system to an Air
/4
the top of the low pressure sensor. Proceed with the step by step installation instructions.
Do not cut, trim, modify, or disassemble the harness.If you have excess length, simply coil
it up and secure out of the way with the provided tie straps.All preassembled gauge panels
RECOMMENDED COMPRESSOR LOCATIONS
Important
Please also remember...
To avoid high heat environments
To avoid mounting the compressor under the hood.
g. 2
Remove
rubber cap
g. 3
Turn allen screw 4 ¼
turns clockwise
Load Controller II
5
MN-337
STEP BY STEP INSTALLATION
All of the electrical connections are matched by male-to-female push-in terminals.All of the
air line connections will be white- to-white, no tape-to-no tape, indicated by the color band.
surface. The bottom edge of the dash on either side of the steering wheel is a good
2. Install the compressor unit.
b. In some cases the mounting area does not provide enough room to use a drill to
the self tapping screws.
Attach the ground wire to one of the screws (g. 1).
c. For box frames: In some cases the frame section will not be wide enough to mount
g. 5
No tape air line
to no tape tee
banded air
line to white
banded tee
Gauge side
g. 4
No tape tee
banded tee
air line
No tape
air line
NOTE
CAUTION
Load Controller II
6MN-337
the female connectors onto the blade connectors on the switch.
b. Match the air line by the color band on the air line to the color band on the tees.
d. Do not connect the power wire at this time.
assemblies. The low pressure sensors protect the air springs from failure resulting
from low pressure in the unloaded condition.These sensors are preset to maintain
in each spring and turn on the compressor if the pressure falls below 5 psi.
The low pressure sensors are preassembled onto wiring harness #1. The sensors should
be located under the dash inside the vehicle and secured with the provided tie straps.
NOTE
g. 7
Air line
Ground
g. 6
Floor plan
Frame
Supplied self
tapping screw
¼” Bolt and nut will need to
be provided if the L-bracket
is fabricated.
Load Controller II
7
MN-337
b. In some cases, a hole may have to be drilled to allow access for the harness.Drill
seal any grommets or holes that have been cut, drilled or removed so as not to allow
elements to enter the cab area of the vehicle.
along the top of a crossmember or over a heat shield is recommended.
shields and along the frame up to the compressor.Avoid heat sources, sharp edges,
and tight bends.
Connect adapter to “HOT” side of the fuse (use a test light to determine). With the ignition
on, the compressor will turn on and ll the system to 10 p.s.i. before shutting off.
NOTE
g. 8
After the hole is drilled and before
you route the harness to through the
rewall, insert the grommet and “walk”
the material around the inside edge of
the dilled hole. You may have to trim
the grommet to get an exact t.
(The exible grommet is in the sealed
parts package.)
Load Controller II
8MN-337
retail purchaser against manufacturing defects when used on catalog-listed applications on
Air Lift manufactures the product.The warranty does not apply to products that have been
improperly applied, improperly installed, used in racing or off-road applications, used for
commercial purposes, or which have not been maintained in accordance with installation
instructions furnished with all products.The consumer will be responsible for removing
Air Lift will repair or replace, at its option, defective products or components.A minimum
Product failures resulting from abnormal use or misuse are excluded from this warranty.The
product without assuming any obligation to modify any product previously manufactured.
This warranty gives you specific legal rights and you may also have other rights that vary
from state-to-state.Some states do not allow limitations on how long an implied warranty
limitation or exclusion may not apply to you.There are no warranties, expressed or implied
warranty period.There are no warranties that extend beyond the description on the face
Warranty and Returns Policy
Please read and follow the maintenance and operating tips in the installation manual
IMPORTANT:
CAUTION
Load Controller II
9
MN-337
Replacement Information
If you need replacement parts, contact the local dealer or call Air Lift customer service at
Contact Air Lift Company customer service at (800) 248-0892, rst if:
Contact the retailer where the kit was purchased:
Contact Information
www.airliftcompany.com.
Air Lift 1000.................... Lifetime Limited
RideControl.................... Lifetime Limited
LoadLifter 5000*............. Lifetime Limited
SlamAir........................... Lifetime Limited
AirCell............................. Lifetime Limited
Lifestyle & Performance** .... 1 Year Limited
LoadController/Single...... 2 Year Limited
LoadController/Dual......... 2 Year Limited
Load Controller (I) ............ 2 Year Limited
Load Controller (II) ........... 2 Year Limited
SmartAir ............................ 2 Year Limited
Wireless AIR...................... 2 Year Limited
WirelessONE..................... 2 Year Limited
Other Accessories............ 2 Year Limited
*formerly SuperDuty
**formerly EasyStreet
Load Controller II
Thank you for purchasing Air Lift products — the professional installer’s choice!
Printed in
Need Help?
Register your warranty online at
www.airliftcompany.com/warranty
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