31
PERIODIC SERVICE
EN
GLISH
FUEL SYSTEM AND DIAGRAMS
B
LPG fuel system
Never use LPG fuel on the WG1605-G-E3 / WG1903-G-E3 /WG2503-G-E3 / WG3800-G-E3 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, and piping should be approved for LPG use and conform
to UL, CSA, NFPA, MSHA and all other applicable standards.
A
For the location of the lock off valve with LPG filter and regulator assy (D-STAGE), see “Fuel system diagrams” section.
B
Tightening torques and leak check for LPG regulator with vaporizer
1. 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.
*NOT KUBOTA supplied
B
NG fuel system
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 fittings, and piping should be approved for NG use and conform to UL,
CSA NFPA, MSHA and all other applicable standards.
A
For the location of the NG fuel components, see "Fuel system diagrams" section.
Tightening torque
Leak check pressure
FITTING
Q'ty
SIZE
N-m
kgf-m
ft-lbs
kPa
Kgf/cm
psi
LPG OUT (VAPOR)
1
19 mm
(3/4") Hose
Fitting
---
---
---
1745 15
17.8 0.15
253 2.1
LPG IN (LIQUID)*
1
1/4-18
NPTF
19.6 to 39.2
2.0 to 4.0
14.5 to 28.9
WATER IN/OUT
2
16 mm
(5/8") Hose
Fitting
---
---
---
210 10
2.1 0.1
29.9 1.4
EG523-8917_E.book Page 31 Friday, May 17, 2019 10:32 AM
