Kubota WSM J Series Workshop Manual page 109

J SERIES, WSM
(B) Timing Gears, Camshaft and Fuel Camshaft [Z482, D722]
Valves
1. Remove the valve caps (2).
2. Remove the valve spring collet (3), pushing the valve spring
retainer (4) by valve spring replacer (1).
3. Remove the valve spring retainer (4), valve spring (5) and valve
stem seal (6).
4. Remove the valve (7).
(When reassembling)
• Wash the valve stem and valve guide hole, and apply engine oil
sufficiently.
• After installing the valve spring collets, lightly tap the stem to
assure proper fit with a plastic hammer.
IMPORTANT

• Don't change the combination of valve and valve guide.
(1) Valve Spring Replacer
(2) Valve Cap
(3) Valve Spring Collet
(4) Valve Spring Retainer
Injection Pump and Speed Control Plate
1. Remove the fuel feed pump.
2. Remove the socket head screws and nuts, and remove the
injection pump (3).
3. Remove the screws and separate the speed control plate (2),
taking care not to damage the spring (4).
4. Disconnect the spring (4) and remove the speed control plate (2).
(When reassembling)
• Hook the spring (4) to the lever (5) first and install the speed
control plate (2).
• Be sure to place the copper washers underneath two screws (1)
(as shown in the figure).
• Position the slot (9) on the fork lever just under the slot (8) on the
crankcase.
• Insert the injection pump (3) so that the control rod (7) should be
pushed by the spring (6) at its end and the pin (10) on the rod
engages with the slot (9) on the fork lever (as shown in the
figure).
NOTE

• The sealant is applied to both sides of the soft metal gasket
shim. The liquid gasket is not required for assembling.
• Addition or reduction of shim (0.05 mm, 0.0020 in.) delays or
advances the injection timing by approx. 0.0087 rad (0.5).
• In disassembling and replacing, be sure to use the same
number of new gasket shims with the same thickness.
(1) Screw
(2) Speed Control Plate
(3) Injection Pump
(4) Spring
(5) Lever
S-63
ENGINE
(5) Valve Spring
(6) Valve Stem Seal
(7) Valve
W10162820
(6) Spring
(7) Control Rod
(8) Slot (Crankcase Side)
(9) Slot (Fork Lever Side)
(10) Pin
W10167080
KiSC issued 10, 2016 A