ENGINE
WG972-E4, WSM
1-M13
Gaseous Fuel System [WG972-GL, WG972-L, WG972-N]
• The *-marked component parts are Not Provided by KUBOTA.
• These non-KUBOTA installed parts, such as hoses, fittings, piping and shut off solenoid valve should be
approved for LPG or CNG use and conform to UL, CSA, NFPA, MSHA and all other applicable standards.
• All fuel connections added to this engine must be installed by qualified personnel and utilizing
recognized procedures and standards.
• Never use LPG fuel on the WG972-G, N engine. Otherwise severe damage will occur.
• Never use CNG fuel on the WG972-G, L, GL engine. Otherwise severe damage will occur.
WG972-GL-E4:
This fuel system has 2 ways.
For LPG fuel, the liquid fuel stored in the LPG tank (8) is sent to Gas regulator with vaporizer (1) by pressure in
the gaseous phase in the tank through the lock off valve (2) (including fuel filter).
The liquid fuel is evaporated in vaporizer (1) and is sent to the LPG mixer (4) as a gaseous fuel. The LPG mixer
(4) mixes the gaseous fuel and air, and the mixture gas is supplied to the cylinder.
WG972-N-E4:
• Lock off valve and pressure sensor should be installed between the CNG tank and high pressure regulator.
• The related parts and the method of installation should be approved for CNG use and conform to local regulations
and all other standards.
9Y1211108ENM0027US0
(1) Gas Regulator with Vaporizer*
(2) Lock Off Valve*
(3) Balance Line*
(4) Gas Mixer
(5) LPG Line [WG972-GL,
WG972-L]
(6) CNG Line [WG972-N]
(7) High Pressure Regulator*
(8) LPG Tank (with Manual
Valve)*
(9) CNG Tank (with Manual
Valve)*
(A) Hot Water OUT
(B) Hot Water IN
(C) LPG Line / CNG Line
(Gaseous)
(D) To Gas Mixer
(E) LPG Line (Liquid)
(F) CNG Line (Gaseous)
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