Fuel System And Diagrams; Gaseous Fuel System; Tightening Torques And Leak Check For Gas Regulator With Vaporizer; Fuel System Diagrams - Kubota WG972-E4 Operator's Manual

FUEL SYSTEM AND DIAGRAMS

BGaseous fuel system
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.
A All fuel connections added to this engine must be installed by qualified personnel and utilizing recognized procedures
and standards.
A 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.
A Lock off valve and pressure sensor should be installed between the CNG tank and high pressure regulator.
BTightening torques and leak check for gas regulator with vaporizer
Each fitting must be sealed with approved joint sealant compound, and be tightened to the specified torque using a wrench
and leak check must be performed as shown in the below table.
FITTING Q'TY
Gas OUT (VAPOR)
Gas IN (LIQUID)*
WATER IN / OUT
*NOT KUBOTA supplied
BFuel system diagrams
C Gasoline [WG972-G / WG972-GL]
SIZE N-m
5/8"
1 ---
Hose Fitting
1 1/4 NPT 19.6 to 39.2
3/8"
2 ---
Hose Fitting
Tightening torque
kgf-m ft-lbs
--- ---
2.0 to 4.0 14.5 to 28.9
--- ---
(1) Fuel rail
(2) Fuel pump assy
(3) Fuel filter
(4) Gasoline tank
A The
Provided by KUBOTA.
(A) Gasoline line
(B) Bleed / Return circuit (If necessary)
PERIODIC SERVICE
Leak check pressure
kPa kgf-cm
2170 22.1
2170 22.1
150 1.5
-marked component parts are Not
23
psi
315
315
21.8