Cub Cadet 8454 Service Manual page 41

E. FUEL INJECTION NOZZLE
The nozzle is a throttle-type. It features low fuel con-
sumption and works well with DAEDONG combustion
chamber. The nozzle valve opening pressure is about
13.7 to 14.7 MPa (140 to 150 kgf/cm
psi), the pressure overcomes the counterforce of nozzle
valve spring, and push the valve up instantly, the fuel is
then injected in a proper quantity into the swirling air in
the combustion chamber for combustion. Addition or
reduction of adjusting shims can adjust the opening
pressure. A washer of 0.1 mm corresponds to 980 kPa
2
(10 kgf/cm , 142 psi) change in opening pressure. The
heat seal is employed to improve the durability and
reliability of the nozzle.
F. GOVERNOR AND IDLE COMPENSATING
a . Disassembled View
The governor serves to keep engine speed constant by
automatically adjusting the amount of fuel supplied to
the engine according to changes in the load. The en-
gine employs an all-speed governor which is controlled
by the centrifugal force of the steel ball (13) weights,
produced by rotation of the fuel camshaft (9), and ten-
sion of the governor spring 1 (2) and 2 (3) are balanced.
D569-W02 May-2003
K&T Saw Shop 606-678-9623 or 606-561-4983
www.mymowerparts.com
2 , 1,991 to 2,134
(1) Nozzle Holder Ass'y
(2) Adjusting Washer
(3) Nozzle Spring
(4) Push Rod
(5) Retaining Nut
(1) Start Spring
(2) Governor Spring 1
(3) Governor Spring 2 (10) Governor Ball Case
(4) Fork Lever 1 (11) Steel Ball
(5) Fork Lever 2 (12) Governor Sleeve
(6) Fork Lever Shaft (13) Steel Ball
(7) Fork Lever Holder
ENGINE
569W235A
(6) Nozzle Body
(7) Needle Valve
(8) Heat Seal
(9) Packing
569W236A
(8) Governor Lever
(9) Fuel Camshaft
2-19