Cub Cadet 8404 - Manual (Page 86)

CHAPTER 2 8354/8404
2-64 D615-W02 May-2003
Fuel
Injection
pressure
Pressure
drop
Factory
spec.
Allowable
limit
14.71 MPa
150 kgf/cm²
2134 psi
0.98 MPa
10 kgf/cm²
142 psi
615W2D7A
615W2D6A
Injection
timing
3A165D, 4A200B,
0.31 rad, 18 °
before T.D.C
F. FUEL SYSTEM
a . Checking and Adjusting
1) Injection pump
(A) Injection term (Injection timing)
1. Remove the injection pipes.
2. Set the speed control lever to the maximum fuel
discharge position.
3. Turn the flywheel counterclockwise (facing the
flywheel) until the fuel flow through to the hole of the
delivery valve holder (1).
4. Turn the flywheel further and stop turning when the
fuel stop to flow, to check the injection timing.
5. If the Fl mark does not align with the mark of the
window on flywheel housing, add or remove the
shim (2) to adjust.
NOTE:
• Apply liquid gasket (There Bond 1215 or equivalent)
to the shim, when reassembling.
(Reference)
• T h e t i m i n g a d v a n c e s b y r e m o v i n g 0 . 1 5 m m
(0.006 in) of shim and retards by adding one, approx
0.26 rad (1.5 °) of crank angle.
• Approx 3.6 mm (0.142 in.) of turn at the outer rim of
the flywheel equals 0.26 rad (1.5 °) of crank angle.
(1) Delivery Valve Holder (2) Shim
(B) Delivery valve fuel tightness
1. Remove the injection pipes, glow plugs and the in-
let manifold, and install the pressure tester.
2. With the speed control lever at the fuel injection
position, turn the crankshaft counterclockwise (fac-
ing the flywheel) until the pressure builds up to the
fuel injection pressure.
3. Release the pressure in the delivery chamber by
moving down the plunger to bottom dead center
(turn the crankshaft clockwise approx. 1.57 rad
(90 °) from the FI timing).
4. If the pressure drop for 5 seconds exceeds the al-
lowable limit, replace the delivery valve or pump
assembly.
5. If the pressure does not built up, replace the pump
element with new one and test again.