Holiday Neptune 2004, Owner'S Manual

Page: 350 / 416

350 • SECTION 10 --- CHASSIS INFORMATION NEPTUNE 2004
The Roadmaster chassis design provides exceptional balance, handling and
braking characteristics. The Roadmaster Raised Rail chassis is an engine and
frame unit featuring a C channel all steel frame design, providing greater structural
integrity and uniform stress distribution. Incorporated in the Roadmaster chassis is
an air suspension system using four air bags and Monroe gas shock absorbers. The
design and set up is intended to provide the smoothest ride, best handling and
trouble free service while delivering excellent drivability.
The Roadmaster chassis is equipped with a Cummins diesel engine. The diesel
engine utilizes an electronic injection system to supply fuel to the cylinders. This
electronic fuel controls allows for a precise fuel delivery resulting in efficient
operation. The Allison 2000 MH transmission is matched to the engine. This is an
electronically controlled automatic transmission using the Shift-by-Wire system.
Finally the chassis is equipped with a three-point hydraulic leveling system to
help minimize site selection and provide comfort when camping. The
Roadmaster chassis design offers unsurpassed ease of maintenance and service.
The towing system rating incorporated in the construction of the frame is
4,000 lbs. towing and 400 lbs. tongue weight.
Roadmaster's exclusive chassis, with air suspension, consists of front and rear
axles with trailing links. An air compressor mounted directly to the engine
provides air pressure for the air suspension system. Each of the four air bags
couples with a gas shock absorber to dampen suspension movement. The air bags
themselves provide no lateral support to the suspension. This is accomplished
using a panhard bar on each axle to control side motion. Each axle mounts to the
trailing links that are connected to the chassis. While the suspension itself has no
maintenance requirements, an annual inspection of the suspension system should
be performed with special attention to tightness of fasteners and component wear.
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.
100168b
Tag located on the curbside, from behind front wheel, and in generator compartment.