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CHASSIS
Diesel Exhaust Fluid (DEF) Maintenance
This article provides an overview about the DEF tank. The DEF tank will require filling a minimum of approximately
every second diesel refuel depending on the DEF tank capacity. 10, 13, and 15-gallon tank capacities are available. DEF
consumption is approximately 2% of fuel consumption, dependent on vehicle operation. For every 50 gallons of diesel fuel
consumed, approximately 1 gallon of DEF will be consumed.
Some vehicles are equipped with a remote DEF fill-port. If
so equipped, the remote port is directly opposite the DEF
tank on the other side of the vehicle, and has a blue cap
over the fill-port. DEF parts, such as the fill cap or tank,
are supplied by the chassis manufacturer and are not
available via the Newmar Parts Department.
DEF consumption varies depending on ambient
conditions and vehicle application.
IMPORTANT
!
Auxiliary Compressed Air Fitting on Diesel Pusher
Coaches
This article provides an operational overview of the coach’s air system connection on a diesel pusher coach.
An auxiliary air supply connection with fitting is supplied
at the rear of the coach in the engine compartment on
select diesel pusher coaches. This connection can be
used to either inflate the air system from an outside
source (such as a shop air compressor) or to use the
coach’s air system and a hose to inflate floats, bike tires,
or car tires. If necessary, the compressor can be used to
inflate a coach tire in a emergency when other sources of
compressed air are unavailable; however, it will take some
time due to low air pressure.
When using air from the connection, the engine should
be running to operate the compressor. The air pressure is
regulated by the air governor for the chassis air system.
The approximate pressure can be monitored by the
gauges on the dash. The air connections are supplied and
plumbed by the chassis manufacturer.
Many coaches also have a connection at the front of the
coach under the hood near the generator on the driver
side. This connection (on some coaches) will only allow
air pressure to be used as a customer connection for
external use and will not allow compressed air to enter
the system. Coaches plumbed in this manner will have
an additional schrader valve port to allow pressurization
during production.
This section has information about air, electric, and hydraulic leveling systems. Due to a very wide range of
operation procedures, refer to the information under the brand and model that applies to your coach.
Leveling Systems
WARNING
!
Never attempt to move the unit with the leveling jacks
deployed. Always visually inspect the jacks prior to
moving to ensure they are fully retracted, are in the
stored position, and the system is turned OFF.
WARNING
!
Do not lift the wheels off of the ground while leveling
the coach. The vehicle may drop and/or move forward
or backward without warning, which may cause
serious injury or death.
You may not have enough air pressure to properly
inflate tires, but you should be able to get enough to
drive to the nearest tire service center.
NOTICE
!
Summary of Contents for Mountain Aire 2022
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