Cub Cadet 7360SS, Service Manual

Page: 105 / 170

104
An increase or decrease of washer thickness
by 0.1 mm (0.004 in.) will vary injection
pressure by 10 kgf/cm 2 (142 psi)[981kPa].
10 kinds of washer are available in thicknesses
from 1.25 mm(0.0493 in.) to 1.70 mm(0.0669
in.) in increments of 0.05 mm (0.0020 in.).
When the injection nozzles are tested. be
sure to wear eye protection. Fuel comes
from the orifices in the nozzle tip with
high pressure. The fuel can pierce(go
through)the skin and cause serious
injury to the operator. Keep the tip of the
nozzle pointed away from the operator
and into the fuel collector.
(2)Orifice restriction test
(a)Look at the orifice discharge pattern
(shape of discharge)when fluid begins
to flow through the injection nozzle.
The discharge must be straight. Any
change is an indication of a bad nozzle.
(b)Operate the tester handle at a speed of
one stroke per second to make sure the
discharge is straight.
(4)INJECTION NOZZLE
1.Inspection
(1)Injection Pressure (valve opening pressure)
test
(a)Install the injection nozzle on the tester.
Slowly operate the tester handle to bleed
(remove) air from the tester.
(b)Operate the tester handle at a speed of
one stroke per second to make a slow
increase in pressure until the valve in the
injection nozzle starts to open. Read the
maximum gauge pressure at the instant
fluid flows from the tip.
(c)If the injection pressure is incorrect,
disassemble the nozzle and change the
thickness of the washer.
Injection pressure 140 kgf/cm 2
(valve opening pressure) (1991 psi)
Standard [13729 kPa]
+5
0
+71
0
+490
0