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5-376-000094
REV. 3 - 03/10
Section III: Maintenance
Page 76
change the filter element will result in premature wear and/or failure of any
or all of the hydraulic components.
Only check gauge when hydraulic
fluid is at operating temperature. Cold oil is more dense and will
give a false indicator gauge reading.
Cold temperatures can cause hydraulic oils to thicken and adversely affect
the hydraulic functions of your carrier. If this is the case, it will be necessary
to change the hydraulic oil to maintain maximum system efficiency. A
hydraulic oil such as Mobil DTE 11M or Conoco AW Hydraulic Fluid MV 32
can be used to replace the factory installed oil or it can be added to the
hydraulic oil in your factory system.
If a cylinder seal leaks, disassemble the cylinder and find the cause of the
leak. Small scores caused by chips or contaminated fluid can usually be
worked out with fine emery cloth to avoid repetition of the trouble. Whenever
any seal replacement is necessary, it is always advisable to replace all
seals in that component. These seals are available in kits. Also, thoroughly
clean all components before reassembly.
The HDR and over components are mounted to the truck chassis by bolts.
We recommend that these bolts be inspected within the first 30 days and
inspected and retorqed every 90 days thereafter. Replace any broken or
damaged bolts immediately.
Refer to chart on the following page.
The body of your Jerr-Dan has been built from high strength aluminum and
composite material which has been carefully assembled in our factory. To
keep it clean and free of dirt use any non-abrasive soap or detergent
recommended for automotive finishes. Use a soft cloth or sponge and finish
with a thorough rinsing. Drying with a soft cloth or chamois will prevent
spotting or streaking. A coat of automotive wax is recommended.
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