Valve Seat Tightness; Nozzle Holder - Kubota D1503-M Workshop Manual

03-M-E3B, 03-M-DI-E3B, 03-M-E3BG WSM

Valve Seat Tightness

[D1503-M, D1703-M, D1803-M, V2003-M, V2203-M, V2403-M,
V2403-M-T]
[D1703-M-BG, V2003-M-BG,
V2403-M-BG]
1. Set the injection nozzle to a nozzle tester.
2. Raise the fuel pressure, and keep at 12.75 MPa (130.0 kgf/cm
1849 psi) for 10 seconds.
3. If any fuel leak is found, replace the nozzle piece.
Valve seat tightness Factory spec.
[D1803-M-DI, V2403-M-DI, V2403-M-DI-T]
1. Set the injection nozzle to a nozzle tester.
2. Raise the fuel pressure, and keep at 16.67 MPa (170.0 kgf/cm
2418 psi) for 10 seconds.
3. If any fuel leak is found, replace the injection nozzle assembly.
Valve seat tightness Factory spec.

Nozzle Holder

[D1503-M, D1703-M, D1803-M, V2003-M, V2203-M, V2403-M,
V2403-M-T]
[D1703-M-BG, V2003-M-BG,
V2403-M-BG]
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 retaining nut
Nozzle holder assembly
(1) Nozzle Holder
(2) Adjusting Washer
(3) Nozzle Spring
(4) Push Rod
G-30
G GENERAL
V2003-M-T-BG, V2203-M-BG,
No fuel leak at
12.75 MPa
2
130.0 kgf/cm
1849 psi
W10412730
No fuel leak at
16.67 MPa
2
170.0 kgf/cm
2418 psi
W1037135
V2003-M-T-BG, V2203-M-BG,
35 to 39 N·m
3.5 to 4.0 kgf·m
26 to 28 lbf·ft
20 to 24 N·m
2.0 to 2.5 kgf·m
15 to 18 lbf·ft
49 to 68 N·m
5.0 to 7.0 kgf·m
37 to 50 lbf·ft
(5) Distance Piece
(6) Nozzle Piece
(7) Nozzle Retaining Nut
W1018491
KiSC issued 07, 2008 A
2
,
2
,