Paragraphs 114A-114D
ALLIS-CHALMERS
14
16
24
Fig. AC51A—Model W Ensign LPG regulator used on WD45 engine—exploded view.
B.
Strainer
C. Valve seat
F.
Outlet valve assy,
K. Idle adjusting screw
1.
Inlet diaphragm lever
2.
Pivot pin
3.
"O"rin«
6. Regulator cover
6. Inlet pressure
diaphragm
7.
Inlet valve assembly
8. Bleed screw
9. Idle screw spring
10.
lUgulator body
11.
Outlet diaphragm
spring
13.
*'O" ring
15.
Back cover plate
16.
Outlet pressure
diaphragm
17.
Push pin
pands rapidly
and is
converted from
a liquid
to a gas by
heat from
the
water jacket
(E)
which
is
connected
to
the
coolant system
of the
engine.
The vaporized
gas
then passes
at a
pressure slightly below atmospheric
pressure
via the
outlet valve
(F)
into
the
low
pressure chamber
(G)
where
it
is
drawn
off to the
carburetor
via
outlet
(H). The
outlet valve
is con-
trolled
by the
larger diaphragm
and
small spring.
Fuel
for the
idling range
of the en-
gine
is
supplied from
a
separate
out-
let
(J)
which
is
connected
by
tubing
to
a
separate idle fuel connection
on
the carburetor. Adjustment
of the car-
buretor idle mixture
is
controlled
by
the idle fuel screw
(K) and the
cali-
brated oriace
(L) in the
regulator.
The balance line
(M) is
connected
to
the
air
inlet horn
of the
carburetor
so
as
to
reduce
the
flow
of
fuel
and
thus
prevent over-richening
of the
mixture
which would otherwise result when
the
air
cleaner
or air
inlet system
be-
comes restricted.
114A. TROUBLE SHOOTING.
The
following data should
be
helpful
in
shooting trouble
on the
WD45
LP-
Gas tractor.
114B.
SYMPTOM. Engine will
not
idle with idle mixture adjustment
screw
in any
position.
CAUSE
AND
CORRECTION.
A
leaking valve
or
gasket
is the
cause
of
the
trouble. Look
for a
leaking
out-
let valve caused
by
deposits
on
valve
or seat.
To
correct
the
trouble, wash
the valve
and
seat
in
gasoline
or
other
petroleum solvent.
If
the
foregoing remedy does
not
correct
the
trouble check
for a
leak
at
the
inlet valve
by
connecting
a low
reading
(0-20 psi)
pressure gage
at
point (R—Fig. AC51).
If the
pres-
sure increases after
a
warm engine
is
stopped,
it
proves
a
leak
in the
inlet
valve. Normal pressure
is
3V2-5
psi.
Fig. AC51B—Using Ensign gauge 8276 to
set the fuel inlet valve lever to the dimen-
sion as indicated at (X) in Fig. AC51.
18.
Partition plate
19.
Partition plate gasket
20.
Drain cock
21.
Reducing bushing
23.
Inlet diaphragm
spring
24.
Spring retainer
114C.
SYMPTOM. Cold regulator
shows moisture
and
frost after stand-
ing.
CAUSE
AND
CORRECTION. Trou-
ble
is due
either
to
leaking valves
as
per paragraph 114B,
or the
vaive
lev-
ers
are not
properly
set. For
informa-
tion
on
setting
of
valve lever, refer
to paragraph
114D.
114D.
REGULATOR OVERHAUL.
Remove
the
unit from
the
engine
and
completely disassemble, using Fig.
AC
Fig. AC51C—Location of post or boss witli
stamped arrow for the purpose of settmg
the fuel inlet valve
lever.
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