Onan 6GO-F User Manual

MAINTENANCE AND REPAiR
The camshaft bearings are bronze bushings which are line reamed after
installation in the crankcase, to a clearance of .0015" to .C02". The
installation of new camshaft bearings is not practicable without the
proper line reaming equipment.
WATER PUMP.- The water pump on this engine is a centrifugal, ball bear-
ing, self sealing type. To dismantle the pump proceed as follows:
1. Remove the nut and lockwasher from the front of the water
pump shaft and, using a sUi table puller, pull the pulley
off the shaft.
2. Remove the three nuts mounting the shaft support to the
body and remove the support assembly.
3. To remove the impeller, remove the set screw and pull or
press the impeller from the shaft. Note that if the set
screw is loosened only a few turns it will not be free
from the hole in the shaft.
4. To remove the shaft and bearings from the support, remove
the set screw from the top of the support and press the
assembly out through the front.
5. The seal will be found assembled in the impeller hub.
Care must be
taken in removing this assembly, as the
carbon seal is fragile and easily broken. To reassemble,
reverse the procedure used in disassembly. When reassem-
bling the pump make sure that the set screw projects far
enough to line up the impeller on the shaft. Press the
impeller on flush with the end of the shaft. Pack, the
space between bearings with a good grade of waterpump grease.
CRANKCASE VENTILATION.- The crankcase oil fill cap permits entry of air
to the crankcase which is drawn out through the valv~ chamber cover
tube to the intake manifold. If the oil fill cap becomes clogged with
dust and dirt, excessive crankcase vacuUm. may build uP. causing oil to
be drawn from the valve chamber into the intake ma.nifold. The baffle
plate on the inner side'of the valve cover must be in place and undam-
aged
for proper ventilation.
LUBRICATION SYSTEM.- A gear type oil pump supplies oil under pressure
through drilled passageways to the crankshaft main bearings, lower con~
necting rod bearings, camshaft bearings and valve tappets, Whenever the
engine is disa.ssembled for servicing, m.ake sure that all oil passa.ges
are unobstructed. Thoroughly clean the engine oil pan and the oil pump
strainer screen. An oil pressure relief adjustment is adjusted at the
factory to give a pressure of 20-40 pounds at the governed speed, with
the engine oil hot. The oil pressure relie~ adjustment is reached by
removing a
large hexagon shaped plug in the side of the crankcase just
below the 011 filter, and ,adjusted by adding or removing spacer washers.
26

Onan 6GO-F Specifications

General

Brand	Onan
Model	6GO-F
Category	Inverter
Language	English