Onan 200 DFP - Generator Set Inspection; Lubrication System

GENERATOR SET INSPECTION
During operation, be alert for mechanical problems that
could create unsafe or hazardous conditions. The fol¬
lowing sections cover several areas that should be fre¬
quently inspected to insure continued safe operation,
Exhaust System
With the generator set operating, inspect the entire
exhaust system visually and audibly including the
exhaust manifold, muffler, and exhaust pipe. Check for
leaks at all connections, welds, gaskets, and joints and
also make sure that exhaust pipes are not heating sur¬
rounding areas excessively. If any leaks are detected,
shut down the generator set and have leaks corrected
immediately.
Inhalation of exhaust gases can
result in serious personal injury or
death. Be sure deadly exhaust gas is piped outside and
away from windows, doors or other inlets to building.
Fuel System
With the generator set operating, inspect the fuel supply
lines, return lines, filters, and fittings for leaks. Check
any flexible sections for cuts, cracks and abrasions and
make sure they are not rubbing against anything that
could cause breakage. If any leaks are detected, have
them corrected immediately.
Ignition of fuel can cause serious
personal injury or death by fire or
explosion. Do not permit any flame, cigarette, or other
igniter near the fuel system.
AC Electric System
Check the following while the generator set is operating;
otherwise measure load lines LI, L2, and L3 using the
appropriate AC meter.
Frequency Meter: T h e generator frequency should be
stable and the reading should be the same as the name¬
plate rating.
AC Voltmeter: Turn the phase selector switch to each
line-to-line phase selection shown on the volts scale
(L1-L2, L2-L3, and L3-L1). Read the AC voltmeter using
the upper or lower scale as indicated by the scale indi¬
cator light. At no load, the line-to-line voltage(s) should
be the same as the set nameplate rating.
AWARNING
AWARNING
DC Electrical System
Check the terminals on the battery for clean and tight
connections. Loose or corroded connections create
resistance which can hinder starting. Clean and recon-
nectthe battery cables if loose. Always disconnect both
ends of the negative battery cable. Reconnect one end
of the cable to the negative battery terminal and the
other end to ground. This will ensure that any arcing will
be away from the battery and least likely to ignite explo¬
sive battery gases.
AWARNING
Ignition of explosive battery gases
can cause severe personal injury. Do
not smoke while servicing batteries.
AWARNING
Accidental starting of the generator
set can cause severe personal injury
or death. Place the control switch in STOP position and
disconnect the battery cable before inspecting genera¬
tor set.
With the generator set stopped, check for loose belts
and fittings, leaking gaskets and hoses, or any signs of
mechanical damage. If any problems are found, have
them corrected immediately. With the set running, listen
for any unusual noises that may indicate mechanical
problems and check the oil pressure frequently, investi¬
gate anything that indicates possible mechanical
problems.
LUBRICATION SYSTEM
The engine lubrication system must be primed and filled
with oil of the recommended classification and viscos¬
ity. Refer to the SPECIFICATIONS section for the lubri¬
cating oil capacity.
Oil API Classification
The lubricating oil recommended for turbocharged die¬
sel engines is API (American Petroleum Institute) Class
CC/CD with a maximum sulphated ash content of 1.85
percent. Oils in this class satisfy the engine manufactur¬
er’s recommendations for satisfactory operation under
most conditions. A book entitled “Lubricating Oils Data
Book” is available from EMA (Engine Manufacturers
Association) that lists the commercially available oils by
brand name and the corresponding API classification.
Once an oil is selected, do not mix it with oils of another
classification or brand.
AC Ammeter: Turn the phase selector switch to each
phase selection shown on the amps scale (LI, L2, and
L3). Read the ammeter using the upper or lower scale as
indicated by the scale indicator light. At no load, the
current readings should be zero. With a load applied,
each line current should be about the same.
Fault Lamps (Two or Twelve-Fault Lamp Panels): Push
the Reset/Lamp switch on the control panel. All indica¬
tor lamps should light. Verify that all of the bulbs are on
and then release the switch. Replace any bulbs that are
burned out.
Oil Viscosity
The viscosity of an oil is a measure of its resistance to
flow at certain specified temperatures. Oils that can
meet both low (0°F or -18°C) and high (212° F or 100°C)
temperature flow requirements are labeled as multi¬
grade or multiviscosity oils. Multigrade oils that meet the
API classification requirements are recommended for
use in the engine by the engine manufacturer. The use
of a multigrade oil will improve oil control, improve
engine cranking in cold weather, maintain adequate
lubrication, and can also contribute to improved fuel
economy.
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