Section III: Maintenance
Page 48
5-376-000102
REV. 1 - 07/10
Cold temperatures can cause hydraulic oils to thicken and adversely affect
the hydraulic functions of your wrecker. 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 and
mixed with the hydraulic oil in your factory system.
If a cylinder seal leaks, disassemble the cylinder and ascertain 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 body of your Jerr-Dan has been built from high strength aluminum which
has been carefully assembled and polished 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.
The MPL is mounted to the truck chassis by bolts. These bolts are torqued
at the factory to 70 ft. lbs. The MPL aluminum body is mounted to the
subframe by bolts. These bolts are torqued at the factory to 70 ft. lbs. We
recommend periodic inspection and retorquing of these bolts. Your truck is
equipped with winches and the winch mounting bolts should be regularly
inspected and tightened if necessary. Replace any broken or damaged bolts
immediately.
Refer to chart on the following page.
