Reconditioning:
The reconditioning procedure stated
previously for the model Fl regulator can
also be followed for the model KN.
Certain changes in procedure will have to be made to allow
for minor design differences that will became obvious as the unit is disassembled.
After recon
-
ditioning is complete and unit is reinstalled in system, adjust lock off per previous instructions.
KOHLER #A
-
271310 (MODEL RCB) TWO
-
STAGE REGULATOR
The model RCB two
-
stage regulator provides primary and secondary regulation for
LPG
vapor
withdrawal systems provided a vaporizer unit is installed on fuel tank side of the system. The RCB
also features an electrically operated fuel solenoid to provide
positive shut off whenever engine is not
in operation. The RCB is often used with the model XG carburetor and an optional vacuum gauge to
provide automatic starting without the need for priming.
Operation:
Fuel entering regulator passes throu
g
h a screen then flows to the electric solenoid
valve.
When actuated, the valve disc
is
lifted off its seat which allows fuel to flow through the
high pressure valve which is in turn controlled
by a diaphragm to reduce pressure to about
4-5
psi.
From here fuel flows into the low pressure chamber where it is drawn off as demanded by
engine.
A balance line or tube usually connects atmospheric side of the low pressure diaphragm to
the air horn side of carburetor.
Depression caused by an increasingly dirty or restricted air
cleaner is thus communicated back to the regulator to maintain constant air
-
fuel ratio.
Without
this line, the mixture would become
proportionately richer as the air restriction increased.
Balance line must have minimum
I.
D.
of 114" to be effective.
A
separate idle line is not required with this unit, although the idle adjustment is made at
the regulator.
Idle fuel flows to the carburetor
throueh the main fuel line.
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