Lubrication Chart; Generator Controls; Section 2. Maintenance Procedures; Engine - Hobart Jet-Ex 5D Operation And Maintenance Manual

OM-2094 / Operation and Maintenance Manual
Jet-Ex 5D / Series 500285/ Generator Set

Section 2. Maintenance Procedures

General
1.
A suggested Maintenance Schedule is provided in Section 1 of this Chapter. Each step of the schedule
is also covered in general in Section 1. This Section covers maintenance in more detail where
necessary.
WARNING
Lubrication
2.
a. General
Proper lubrication is one of the most important steps in good maintenance procedure. Proper
lubrication means the use of correct lubricants and adherence to a maintenance time schedule.
Lubrication points, frequency of lubrication, and recommended lubricants are part of the time
schedule.
b. Lubrication Chart
Lubrication points are illustrated and identified by name on Lubrication Chart, Figure 1. Number
symbols used to designate the kind of lubricant required and the specification recommended are
identified in Figure 2. Letter symbols used to designate the normal lubrication period are identified in
Figure 3.
c. Generator
The 28.5 volt DC generator requires NO lubrication. The armature is sealed at the factory for
lifetime, maintenance free operation. The front end of the armature is supported by the engine main
bearings.
d. Generator Controls
Generator controls and instruments require no periodic lubrication. A few drops of oil may be
required on the clear plexiglass cover hinge occasionally to insure free and quiet operation.
e. Engine
Although the engine and its accessories require no more attention than any other similar installation,
they still inherently require a major portion of the generator set lubrication and maintenance.
Recommendations regarding engine lubrication have been taken from the Engine Manufacturers
Users Manual.
(1) Lubrication Schedule
Time schedules indicated on the Lubrication Chart, Figure 1, are approximate. They are based
on average operating conditions. It may be necessary to lubricate more frequently under severe
operating conditions such as: low engine temperature, high oil temperature, intermittent
operation, or dusty conditions. However, time intervals should not exceed those indicated in the
chart without careful evaluation.
The use of quality lubricating oil, combined with proper oil drain and filter change intervals are
important factors in extending engine life.
(2) Oil Specification
Lubricating oils must be equal to the U.S. Ordnance specification MIL-L-46152 or MIL-L-2104C.
See Engine Manufactures user's handbook for recommended oil viscosity.
November 1, 2000
Revised 08/01
Stop operation immediately if a serious or possibly dangerous fault is
discovered.
Chapter 2-2
Page 1