Cayman 2006 Chassis Information — Section 10 • 225
CHASSIS - INTRODUCTION
This section contains information and instruction regarding various components of the motorhome chassis.
Follow the guidelines and procedures to help understand and operate the motorhome. Complete instructions for
engine and transmission are located in their respective operators manual included in the Owner’s Information
File Box.
WARNING:
When welding is involved for motorhome repair or modification, only qualified, experienced
technicians should weld on the chassis. Improper welding procedures and materials
may weaken the assembly or result in damage that is not obvious and may not cause an
immediate problem or failure. Unauthorized modifications or repairs to the chassis could
result in a forfeiture of warranty coverage.
Due to the sensitive nature of the electronics on the chassis, the following precautions are
required to protect electrical components in the motorhome chassis.
1. Disconnect the (+) positive and (-) negative battery connection.
2. Cover electronic control components and wiring to protect from hot sparks.
3. Disconnect the terminal plugs from the engine Electronic Control Unit located on the curb
side of the engine block.
4. Disconnect all the plugs from the Allison Electronic Control Module and the Vehicle
Interface Module (VIM), located in the electrical bay at the road-side front of the
motorhome.
5. Disconnect the wiring from the alternator.
6. Do not connect welding cables to electronic control components.
7. Attach the welding ground cable no more than two feet from the part to be welded.
The Roadmaster chassis design provides exceptional balance, handling and braking characteristics. The
Roadmaster chassis is an engine and frame unit featuring an all steel frame design, providing greater structural
integrity and uniform stress distribution. Incorporated in the Roadmaster chassis is the air suspension system, with
four air bags and Monroe gas shock absorbers. This design provides the smoothest ride, best handling and trouble
free service while delivering excellent drivability. The chassis also has a three-point hydraulic leveling system.
The Roadmaster chassis design offers unsurpassed ease of maintenance and service.
The towing system rating incorporated in the construction of the frame is 7,000 lbs. towing and 700 lbs.
tongue weight.
Roadmaster’s exclusive rail chassis, with air suspension, consists of front and rear axles with trailing links.
A panhard bar on each axle controls side motion. Each axle mounts to the trailing links that are connected to the
chassis. The suspension control arms attach to the frame through bushings, which require no lubrication. The
preset suspension ride height automatically maintains proper suspension height throughout the load range.
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