Fuel Feed Pump; Fuel Injection Pump - Ezgo 1600xd Repair Manual

3.4.4 FUEL FEED PUMP

(A)
From fuel fi lter
4
1
5
2
6
3
7
(1) Suction valve
(2) Push rod
(3) Tappet
(4) Discharge valve
The diaphragm (6) is linked to the tappet (3) with the push
rod (2). The tappet is reciprocated by the eccentric cam on
the fuel camshaft (7).
(A) SUCTION STROKE
When the diaphragm is pulled down by the spring,
it builds a vacuum in the chamber (5) causing the
discharge valve (4) to close and the atmospheric
pressure in the fuel tank to force the fuel into the
chamber, opening the suction valve (1).
(B) DISCHARGE STROKE
When the diaphragm is pushed up by the cam, the
pressure in the chamber causes the suction valve to
close and forces out the fuel, opening the discharge
valve.
SUUV-W00 Apr. 2011
ENGINE - STRUCTURE AND FUNCTION
(B)
To injection pump
S76W234A
(5) Chamber
(6) Diaphragm
(7) Fuel camshaft

3.4.5 FUEL INJECTION PUMP

b
6
7
8
(a) To injection nozzle
(1) Delivery valve holder
(2) Delivery valve spring
(3) Delivery valve
(4) Cylinder
This fuel injection pump is Bosch K (type) fuel injection
pump. It features a compact and light weight design.
a
1
2
3
4
5
S76W234A
(b) From fuel feed pump
(5) Plunger
(6) Control rack pin
(7) Plunger spring
(8) Tappet
3
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