232 • Section 10 — Chassis Information
Cayman 2006
HEIGHT CONTROL VALVES
Height Control Valves (HCV) infl ate or defl ate air springs to maintain proper suspension height throughout
the load range. Two Height Control Valves are installed at the rear drive axle to control rear suspension height and
left or right tilt of the motorhome. A separate HCV is installed to control front suspension height. The three HCVs
mount to the main frame of the motorhome, above the axles, with a linkage rod connecting the valve to the axle.
Actuating components inside of the valves are oil dampened to reduce valve reaction to momentary
suspension bounce and rebound. When a constant suspension change occurs, such as a load change or weight
transfer through a sustained corner, the valve reacts by adding or purging air from the air springs as needed.
The air springs mount between the main frame rails and the trailing links. There is a specifi ed distance the
air spring must maintain between the mounting plates. Other than specifi ed distance between the plates will
compromise ride quality and handling, and affect shock absorber travel, drive shaft angle, as well as various other
running gear components.
Should it become necessary to check the suspension ride height, start with the motorhome on a fl at level
surface. The air system must be fully charged with the suspension normalized at ride height. Specifi ed distances
may vary plus or minus ¼". Small offset adjustments to the rear valves may be necessary to compensate for slight
tilt. Example: Adjusting the curbside rear height control valve up will pivot the roadside front corner down.
NOTE:
Drive shaft angle is affected by the suspension ride height. Improper drive shaft angle can
damage suspension or shorten the life of universal joints. Shock absorbers and air springs
are in travel centers at proper ride height.
Adjusting Ride Height
Preparations to adjust the suspension ride height:
• The motorhome on fl at level surface.
• Air system fully charged.
• Suspension at normal ride height.
090293b
090371b
Height:
Front: 6.5”
Rear: 8”
Содержание Cayman 2006
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Страница 64: ...56 Section 2 Driving Safety Cayman 2006 Weighing Procedure Worksheet 020255BA Example Worksheet ...
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Страница 66: ...58 Section 2 Driving Safety Cayman 2006 Weight Record Sheet ...
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