Cub Cadet 8454 Service Manual page 38

CHAPTER 2 8454
C. FUEL FEED PUMP
The diaphragm (6) is linked to the tappet (3) with a
push rod (2). The tappet is reciprocated by the eccen-
tric cam on the fuel camshaft (7).
(A) Inlet stroke
When the diaphragm is pulled down by the spring,
vacuum in the chamber (5) causes the outlet valve (4)
to close and the atmospheric pressure in the fuel tank
forces the fuel into the chamber, opening the inlet valve
(1).
(B) Discharge stroke
When the diaphragm is pushed up by the cam, the
pressure in the chamber causes the inlet valve to close
and forces out the fuel, opening the outlet valve.
D. FUEL INJECTION PUMP
The injection pump is bosch K type mini injection
pump. It features a compact and light weight design.
2-16
K&T Saw Shop 606-678-9623 or 606-561-4983
www.mymowerparts.com
(a) From Fuel Tank
(b) To Fuel Filter
(1) Inlet Valve
(2) Push Rod
(3) Tappet
(4) Outlet Valve
(a) To Injection Nozzle
(b) From Fuel Filter
(1) Delivery Valve Holder
(2) Delivery Valve Spring
(3) Delivery Valve
(4) Cylinder
569W229A
(5) Chamber
(6) Diaphragm
(7) Fuel Camshaft
569W230A
(5) Plunger
(6) Control Rack
(7) Plunger Spring
(8) Tappet
D569-W02 May-2003