Kubota Z400-B Handbuch Seite 41

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FUEL IN.IECTION PUMP
The injection pump is a Bosch MD type mini-injection pump,
which gives high injection quality even at low engine speeds.
The plunger is reciprocated by the cam on the camshaft with
the tappet and forces the fuel into the injection nozzle.
The control rod (4) is pushed or pulled by the fork lever
of the governor and rotates the control sleeve (5) and the
plunger, which has a left-hand lead control groove, to vary
the amount of fuel forced into the injection nozzle.
(1) Delivery Valve Holder
(2) Delivery Valve Spring
(3) Delivery Valve
(4) Control Rod
(5) Control Sleeve
(6) Cylinder
(7) Plunger
(8) Plunger Spring
(9) Tappet
Ol09F034
0011 F043
1) Pump Element
The pump element consists of the plunger (4) and cylinder
(3)' and their sliding surfaces are super precision-machined to
maintain fueltightness.
The plunger fits in the control sleeve which is engaged with
the control rack.
The plunger has a control goove of with a left-hand helix lead.
(1)
Feed Hole
(2) Control Groove
(3) Cylinder
(4) Plunger
M-31