Case IH Instructions for Installing & Operating LP-GAS Equipment on Model LA Series Tractors Operator’s Manual Instant Download (Publication No.5643)

1
Instructions for Installing Operating LP-GAS
EQUIPMENT on Model LA Series Tractors
5643
2
THIS SAFETY ALERT SYMBOL INDICATES IMPORTANT
SAFETY MESSAGES IN THIS MANUAL. WHEN YOU SEE THIS
SYMBOL, CAREFULL Y READ THE MESSAGE THAT FOLLOWS
AND BE ALERT TO THE POSSIBILITY OF PERSONAL
INJURY OR DEM H B
If Safety Decals on this machine use the words
Danger, Warning or Caution, which are defined as
follows G DANGER Indicates an immediate
hazardous situation which if not avoided, will
result in death or serious injury. The color
associated with Danger is RED. G WARNING
Indicates an potentially hazardous situation
which if not avoided, will result in serious
injury. The color associated with Warning is
ORANGE. G CAUTION Indicates an potentially
hazardous situation which if not avoided, may
result in minor or moderate injury. It may also
be used to alert against unsafe practices. The
color associated with Caution is YELLOW. If
Safety Decals on this machine are ISO two panel
Pictorial, decals are defined as follows G The
first panel indicates the nature of the hazard. 0
The second panel indicates the appropriate
avoidance of the hazard. G Background color is
YELLOW.
G Prohibition symbols such as and
if used, are RED.
O X
WA I IMPROPER OPERATION OF THIS MACH INE CAN
CAUSE INJU RY OR DEATH. BEFORE USING THIS
MACHINE, MAKE CERTAIN THAT EVERY OPERATOR G Is
instructed in safe and proper use of the
machine. G Reads and understands the Manual(s)
pertaining to the machine. G Reads and
understands ALL Safety Decals on the machine. G
Clears the area of other persons. G Learns and
practices safe use of machine controls in a safe,
clear area before operating this machine on a job
site. It is your responsibility to observe
pertinent laws and regulations and follow Case
Corporation instructions on machine operation and
maintenance.
2001 Case Corporation
Bur 0-00000 March, 1995 (Revised October, 1997)
CASE and IH are registered trade marks of Case
Corporation
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LP-GAS EOUIPMENT
Instructions
lnstalhng and Operating
MODEL LA SERIES TRACTORS
J. I. CASE COMPANY Racine, . _at_.
SECOND EDITION
I'orza 5643 500 5-56
4
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LP-GAS EQUIPMENT OR MODEL LA SERIES TRACTORS
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THE APPLICATION OF LP- GAS AS A FUEL FOR ENGINE U
SE
Butane and PropaneLiquefied Petroleum
Gasesare generally referred to as LP-Gas. The
term is a general designation of Butane or
Propane or a mixture of both. LP-Gas, which
exists in a gaseous state at normal atmospheric
temperatures and pressures, is liquefied by the
application of moderate pressures. When con-
sidering the utilization of LP-Gas for the
internal combustion engine, it is well to bear in
mind that the liquid fuel under pressure is
constantly striving to re- turn to its gaseous
state under which it was first captured at the
refinery and liquefied. One need only crack a
valve on the tank and the liquid spews out in
force in much the same manner as steam is
released. The liquid almost instant- ly turns
into a vapor and disappears in the
atmosphere. After the fuel has reached the vapor
stage, the pressure must be dropped to a uniform,
workable value. When LP-Gas expands and
vaporizes, it increases in volume very rapidly,
thereby causing a refrigerating effect which
would freeze up the mechanism were it not for the
application of heat or a differential in
temperature between the expanding LP-Gas and the
expansion chamber. The principle of operation,
broken down into four stages for close examina-
tion, are shown on the flow diagram, 'igure 2,
in the following order lPrimary or high
pressure regulation. LP-Gas is dropped from tank
pressure (20 to 175 pounds) down to a regulated 4
to 6 pounds. 2Application of heat to the rapidly
expanded fuel. This function is performed by the
vaporiser, a device heated by engine circulating
water. 3Low pressure regulation. The
thoroughly vaporized and expanded LP-Gas must
be dropped further in pressure from the initial 4
to 6 pounds to slightly below atmospheric
pressure. The low pressure regu-
2
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LING VALV rRSSUNE eELler VALVE
Hor wATER FROM ENGINE
LOW PRESSURE REGULATOR INLET MANIFOLD
VA PORIZ ED L. P GAS
LIOUIO FILTER
AIR INLET
VAPORIZ Eft
CARBURETOR
HIGH PRESSURE REGULATOR
It ETURN TO WATER PU/\P
BUTANE-PROPANE LIOUID . BUTANE-PROPANE VAPOR
_at_ ENGINE COOLING WATER GAS AIR MIXTURE
0 F L W DI A G R B U T A N E0- P R PA N E F U E
L
A P P LI C ATI O N
Wgure 2. lator or metering regulator must not
only shut off the fuel a little below atmospheric
pressure, preventing any leakage, but must also
be so de- signed as to instantly permit vaporized
LP-Gas to flow to the carburetor and engine in
metered volumes to conform automatically to
every en- gine demand. 4Carburetiori. This last
stage is a mixing functionmixing fuel and
airand a means for proportioning or measuring
out gas and air for the right mixture strengths.
Coordination between the low pressure regu- lator
or metering regulator and carburetor must be
perfect throughout the entire range of engine
speeds and loads, from fast acceleration to wide
open throttle and back to idle. Flow
characteristics of the carburetor and regulator
must follow very closely the engine demand. This
perfor- mance must be instant and without periods
of erratic over-richness or lean flat-spot
operation.
3
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LP - GAS EQUIPMENT FOR MODEL LA TRACTOR PREPARING
THE TRACTOR FOR FIELD INSTALLATION OF LP-GAS
EQUIPMENT To convert the Model LA Tractor to
LP-Gas, it will be necessary to discon- nect and
remove certain parts. These parts should be
removed as follows Drain the fuel tank and the
radiator. Remove the engine hood from the
tractor. Disconnect and remove the fuel line that
is connected to the carburetor and the fuel
filter. Detach the instrument panel from the fuel
tank and remove the tank complete with fuel
filter. Disconnect the rear section of the
throttle control rod at the point where the
governor speed adjustment is made, and at the end
which is attached to the throttle hand lever.
Pull the rod back until it is clear of the fuel
tank front support. Disconnect the spark control
rod from the magneto spark lever and from the
spark hand lever. Pull the rod back until it is
clear of the fuel tank foward support. Remove the
forward fuel tank support. Disconnect the
temperature gauge at the radiator inlet elbow.
Disconnect the oil line from the pressure gauge
and from the tee oil con- nection on the rear of
the cylinder block. Disconnect the ammeter and
light switch wires. disconnect and remove the
choke control from the instrument panel. Remove
the gauges and the light switch from the
instrument panel. Take the number plate off the
instrument panel. Take the generator off the
engine and remove the generator shield. Remove
the radiator inlet elbow and the cylinder inlet
elbow. Disconnect, at the carburetor, the rod
that connects the governor lever to the
carburetor.
4
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Fi gure 3. Rear View of Model LA Tractor With
Parta Removed for Installation of LP-Gas
Equipment Take off the radiator grill and remove
the radiator shutter and control rod. Replace
the radiator grill. Take off the air cleaner
reservoir and remove the carburetor and the
carburetor adapter.
10
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