Disassembling And Assembling - Kubota WSM J Series Workshop Manual

J SERIES, WSM

(2) Disassembling and Assembling

(A) Injection Nozzle
Nozzle Spraying Condition
1. Set the injection nozzle to a nozzle tester (Code No. 07909-
31361), and check the nozzle spraying condition.
2. If the spraying condition is defective, replace the nozzle piece.
(a) Good
Valve Seat Tightness
1. Set the injection nozzle to a nozzle tester (Code No. 07909-
31361).
2. Raise the fuel pressure, and keep at 12.7 MPa (130 kgf/cm
1850 psi) for 10 seconds.
3. If any fuel leak is found, replace the nozzle piece.
Valve seat tightness Factory spec.
Nozzle Holder
1. Secure the nozzle retaining nut (7) with a vise.
2. Remove the nozzle holder (1), and take out parts inside.
(When reassembling)
• Assemble the nozzle in clean fuel oil.
• Install the push rod (4), noting its direction.
• After assembling the nozzle, be sure to adjust the fuel injection
pressure.
Nozzle holder
Tightening torque Overflow pipe nut
Nozzle holder assembly
(1) Nozzle Holder
(2) Adjusting Washer
(3) Nozzle Spring
(4) Push Rod
S-107
ENGINE
(b) Bad
W10411400
No fuel leak at
12.7 MPa
2
130 kgf/cm
1850 psi
W10412730
34.3 to 39.2 N·m
3.5 to 4.0 kgf·m
25.3 to 28.9 ft-lbs
19.6 to 24.5 N·m
2.0 to 2.5 kgf·m
14.5 to 18.1 ft-lbs
49.0 to 68.6 N·m
5.0 to 7.0 kgf·m
36.2 to 50.6 ft-lbs
(5) Distance Piece
(6) Nozzle Piece
(7) Nozzle Retaining Nut
W10415210
KiSC issued 10, 2016 A
2
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