Haldex ILAS-III 90555293

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Part 90555288 90555293

Number Fully Automatic Manual Lift

Automatically based Automatically based

on Ps1 setting and on Ps1 setting and

load of vehicle load of vehicle

Automatically based Manually with use

on Ps2 setting and of the control button

load of vehicle

With use of manual With use of

override components control button

3/8” PTC 3/8” PTC

Lower

Axle

Lift

Axle

Manual

Operation

Port

Fitting Size

The ILAS-III Valve is used for the lowering and lifting of one or multiple axles on an air ride

suspension depending on the load applied to the vehicle.

Assembly

• Use the provided holes to install the ILAS-III Valve. Make sure the valve is

mounted in a location that is protected from water on the road and high

pressure cleaning. The fittings on the valve must point downward. Refer to

Figure 1 and Figure 3.

Note: If a high pressure washer is used to clean the vehicle, a distance of at least

50cm (20”) should be used.

• The control button (manual version) should be easily accessible and not

protrude over the edge of the vehicle when pulled out.

• The valve should also be protected from unintentional activation.

• If the valve will be painted or coated, avoid painting the exhaust vent hole and

rubber boot for the control button (manual version).

• Check and record the lowering pressure on the valve or in an area visible

from the lift axle(s).

Port description:

• 1 = Supply

• 11 = Suspension Air Bags

• 21,22 = Lift Axle Suspension Air Bags

• 23 = Lift Bags

• 3 = Exhaust

Warning:

Keep area of lift axle clear. The axle(s) will automatically lower when the lowering

pressure is reached.

Installation Instructions for the ILAS-III Valve

L31227 (94130007) Rev. 11/17

Installation

Guide

90555293

90555288

General Information

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Summary

General Information

Assembly Instructions

Steps for mounting the ILAS-III Valve, ensuring protection and correct orientation.

Port Description

Explains the function of each numbered port on the ILAS-III Valve.

ILAS-III 90555293 Manual Lift Installation

Functional Check for Manual Lift Valve

Procedure to verify the correct functioning of the manual lift valve.

Setting Ps1 Pressure for Manual Lift

Guide to setting the pressure for lowering lift axles on the manual version.

ILAS-III 90555288 Fully Automatic Installation

Functional Check for Automatic Lift Valve

Procedure to verify the correct functioning of the fully automatic valve.

Setting Ps1 Pressure for Automatic Lift

Guide to setting the pressure for lowering lift axles on the automatic version.

Setting Ps2 Pressure for Automatic Lift

Guide to setting the pressure for lifting lift axles on the automatic version.

ILAS-III Manual Override Installation

ILAS-III Port Callouts

Identifies and labels the different ports on the ILAS-III Valve.

ILAS-III Installation Requirements

Lists essential requirements and considerations before installing the ILAS-III valve.

Pressure Protection Valve (PPV) Premium

Details requirements and specifications for the Pressure Protection Valve.

Manually Operated Valve Details

Describes the manual override valve and its connections.

Three-Way Pilot Valve Operation

Explains the function and operation of the three-way pilot valve.