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Installation
Guide
L31231
2/10
Installation Instructions for the
PR and PR Plus Height Control Valve
PR & PR Plus General Information
The Haldex Precision Response (PR & PR Plus) Height Control Valves (HCV) automatically add and exhaust
air from any air suspension to maintain a constant static design ride height. The PR line of HCV's are
perfect for light to heavy duty applications and can be installed on rear air suspension, cab air suspension
and front air suspension applications. The PR and PR Plus line of HCV's offer an array of fittings, manifolds
and integrated dump valve options. The PR and PR Plus HCV can be used in left or right hand installations
with short or long control arm configurations. The Haldex line of PR height control valves have an industry
leading deadzone, can operate in hot and cold environments and decrease air consumption
NOTE: The Haldex PR & PR Plus HCV(s) can be interchanged with other brands of height control valves.
Be sure to read instructions carefully for proper replacement and installation.
Before You Get Started
IMPORTANT: The HCV and linkage are designed to maintain the vehicle ride height as loads increase and
decrease. Proper setup of the PR and PR Plus HCV(s) is critical to system performance. Prior to any assembly
or disassembly, please read all instructions. Should you feel unable to properly perform the installation or
adjustments of a Haldex PR or PR Plus HCV contact Haldex Technical Services or have a certified mechanic
install or adjust the valve.
CAUTION: Incorrect installation of any HCV and associated components can impair suspension and
vehicle performance. It is extremely important that the original equipment manufacturer's specifications of
a one or two HCV system be followed when installing an air control system. Refer to vehicle and suspension
manufacturer's instructions for recommended valve location and ride height.
DO NOT install a single height control valve of any type if the suspension or vehicle manufacturer
specifies a two height control valve installation.
DO NOT use a time delay valve with a PR or PR Plus HCV on the same vehicle.
DO NOT use antifreeze or other solvents in an air supply line. Use of solvents or antifreeze can damage
seals and void the valve warranty.
NOTE: Conducting routine air system maintenance can help prevent any damage to air system
components. Never introduce foreign chemicals into any air system. Drain all moisture from air reservoirs
at regular intervals.
ALWAYS use a Pressure Protection Valve (PPV) and filter such as the Haldex Part Number 90554107.
Attach PPV directly to the air reservoir for supply to the PR & PR Plus HCV.
Reference Dimension Details for PR Plus HCV
Figure 1
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- Página 1 The PR and PR Plus line of HCV’s offer an array of fittings, manifolds and integrated dump valve options. The PR and PR Plus HCV can be used in left or right hand installations with short or long control arm configurations. The Haldex line of PR height control valves have an industry...
- Página 2 Haldex Technical Svc. in the PR Plus HCV. For proper mounting bolt spacing see Fig. 1 & 2. The PR & PR Plus valves should be mounted as level as possible. A small torpedo level or mason’s line level can help in this positioning.
- Página 3 If the linkage is in tension or the rubber link end is being pulled along the rod at full the lower linkage tab. A typical PR HCV and linkage assembly are shown in Fig. 5. Note the recommended extension, the valve position and/or linkage axle tab will need to be moved.
- Página 4 90554107 -- PPV With Inline Filter Warning: The products described within this literature, including without limitation, product features, specifications, designs, availability and pricing are subject to change by Haldex and its subsidiaries at any time without notice. This document and other information from Haldex, its subsidiaries and authorized distributors provide product and/or system options for further investigation by users having technical expertise.
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Página 5: Instalación
IMPORTANTE: Las HCV y las uniones están diseñadas para mantener la altura de recorrido del vehículo a medida que las cargas aumentan o disminuyen. El ajuste correcto de HCV de PR y PR Plus es vital para el funcionamiento del sistema. Antes del ensamble o desensamblaje, lea todas las instrucciones. Si considera que no está... - Página 6 Determine si el brazo de control y agujero del identificador de 4. Coloque HCV PR y PR Plus sobre el riel del marco o un soporte y aplique torque a las tuercas de montaje alineación de la tapa de interfax a 35 a 45 pulg-lb.
- Página 7 12. AJUSTE LA ALTURA DE RECORRIDO SI ES NECESARIO. Ajuste cuidadosamente el ensamble de la unión manual o válvula de solenoide o brazo de control para colocar la suspensión en la altura de recorrido. Es posible que su HCV PR o PR eléctrico según se muestra en la Plus tengan un brazo de control ajustable que proporciona aproximadamente 1”...
- Página 8 Advertencia: Los productos aquí descritos, que incluyen pero no se limitan a, características de productos, especificaciones, diseños, disponibilidad y asignación de precios están sujetos a cambio de Haldex y sus subsidiarias en cualquier momento sin previo aviso. Este documento y otra información de Haldex, sus subsidiarias y distribuidores autorizados proporcionan opciones de productos o sistemas para que los usuarios que cuentan con experiencia técnica, realicen más investigaciones.