Hobart 5359D Operation And Maintenance Manual page 151

c
OM 2012
If the cy!inc!cr has keen misfiring, there will b;> no noticeuble difference
in the sound and opcraticn of the engi:>e.
If the cylinder has been firing
propzrfy there will Lx a noticeable difkrence in the sound and oFration
when the plunger is held down.
This is simi!ar to short-ci:cuiting
a
spark
plug in a gasoline engine.
(5) If cylinder No. 1 is firing properly,
repat the procedure
on the of.her
cylinders untii the faulty c*re has been located.
(6) Providing that the injector operating mechunizm of the faulty cylinder is
functioning satisfactorily, remove the fuel in $ctor and instull a new injector.
C. Checking Compression Pressure
(1) Sfart engine and run until normal oFrating temperature is rea$ied,
(2) With engine stopped, remove fml pipe-s from the injector and fue I calnectcrs
*.
of No. 1 cylinder.
(3) Remove the injector from No.
1 cylinder aqd install the proper adaptor of
the pressure gauge (tool J6692) in its place.
(4) Use one of the two fuel pipes as a jumper connection ktween the fuel in let
and return manifold to prmit fuel to flow directly to the return manifold.
On some cylinder heads it is necessary to fabricate a itimper connection
from a fuel pipe.
(5) Start the engine and run at idle speed.
CAUTION: DO NOT CRANK THE ENGINE WITH CRANKING (STARTING)
MOTOR TO OBTAIN COMPRESSION PRESSURE.
Record compression pressure indicated.
NOTE: A guide to minimum compression pressures to be expected is in-
cluded in Sect. 2-3, Fig. 8.
(6) Remove pressure gage, install injector, and reinstall fuel lines.
Aug 25, '85
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