Air Lift 25812 Installation guide

Brand: Air Lift

Model: 25812

Category: Air compressors

Type: Installation guide

This manual is also suitable for

Load Controller II 25812

Air Lift Load Controller II 25812 is a compressor system that helps maintain the right amount of air pressure in your vehicle's air springs, ensuring a smooth and comfortable ride. It features a digital gauge that displays the air pressure in each spring, allowing you to adjust it to the desired level. The system also includes a low-pressure sensor that automatically activates the compressor when the pressure drops below a certain point.



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

MN-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

MN-337

Installation Diagram

Check valves

Low pressure

sensors

Harness #2

Harness #1

Panel Assembly

Fuse box

Air springs

(previously installed)

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

MN-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

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

MN-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

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

MN-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

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!

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

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





www.airliftcompany.com/warranty

Air Lift 25812 Installation guide

Brand: Air Lift

Model: 25812

Category: Air compressors

Type: Installation guide

This manual is also suitable for

Load Controller II 25812

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Air Lift 25812 Installation guide

This manual is also suitable for

Air Lift 25812 Installation guide

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