ENGINE
B2420, WSM
1-S32
Injection Pump
1. Remove the injection pump mounting screws and nuts.
2. Align the control rack pin (2) with the notch (3) on the crankcase,
then remove the injection pump (1).
3. Remove the injection pump timing shims.
4. In principle, the injection pump should not be disassembled.
(When reassembling)
• Securely fit the control rack pin (2) to the shim (soft metal gasket
shim). The liquid gasket is not required for assembling.
• Addition or reduction of shims (0.05 mm, 0.002 in.) delays
or advances the injection timing by approx. 0.0087 rad
(0.50 °).
• In disassembling and replacing, be sure to use the same
number of new shims with the same thickness.
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Fuel Camshaft
1. Remove the fuel camshaft stopper (4).
2. Draw out the fuel camshaft (5) and injection pump gear (3).
3. Remove the fuel feed pump cam (1) from the injection pump
gear (3).
(When reassembling)
• Apply engine oil thinly to the fuel camshaft before installation.
• Check to see each aligning marks of cam (1) and gear (3) are
aligned.
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(1) Injection Pump
(2) Control Rack Pin
(3) Notch
(4) Fork Lever 1
(5) Thrust Lever
(1) Fuel Feed Pump Cam
(2) Washer
(3) Injection Pump Gear
(4) Fuel Camshaft Stopper
(5) Fuel Camshaft
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