Section 10 --- Chassis Information
The Executive 2005
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Oil Change Intervals
The recommended oil change interval is based on operating conditions, speeds and loads. Limited
service applications may allow the recommended interval to be increased. Severe applications may
require the recommended interval to be reduced. For more information, contact a Dana/Eaton service
representative.
Recommended Interval Change:
• Change the fluid whenever the seals are replaced, the brakes are relined or at 30,000 miles
(48,000km). However, check the lubricant twice a year (spring and fall) for contamination.
Change as needed.
• If yearly mileage is less than 30,000 miles, change the fluid twice a year (spring and fall).
Lubricant Type:
• Shell Hypoid gear oil, GL-5, S.A.E. 80w/90. Specifications, minimum ambient tempera-
ture - 15º F (-26.1º C). There is no maximum ambient temperature. Lubricant temperature
must never exceed 250º F (+121º C).
To Drain:
• Place a suitable container below the bearing cover and remove the drain plug. If the cover
does not have a drain plug, remove the screws retaining the cover plate to drain the lubri-
cant.
• Replace plug or cover plate and fill bearing assembly with the recommended lubri-
cant.
SHOCK ABSORBER
The shock absorber by definition is a hydraulic device used to dampen suspension/body
movement. Road surface irregularities are compensated for by the shock absorber. The roadmas-
ter chassis incorporates the "Bilstein" shock in the design of the exclusive air glide suspension
system. This shock absorber is a telescopic, mono tube unit filled with nitrogen gas and
hydraulic oil. The result of the mixture is uninterrupted damping for the smallest of wheel deflection.
By design, a self lubricating seal is used which will allow approximately 10% of the total oil
capacity to pass onto the piston rod. The gradual process of oil loss does not affect the perform-
ance of the shock absorber during the service life. This process will be evident after a long period
of service by an oil film on the body of the shock absorber. The appearance of a coating or film
on the body or rod is completely normal, it is an indication the shock is functioning normally.
Road holding, handling, balance and braking characteristics all can be contributed to the
shock absorber. The operating conditions for which the shock absorber must endure will deter-
mine the life span. However, since the only moving part is the piston rod, there are no springs,
hinges or pins to wear out, get weak or deteriorate.
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