Cub Cadet Yanmar 3TNV72 - Manual (Page 177)

FUEL SYSTEM
7-16 TNV IDI Service Manual
Fuel Injection Pump
18. Once the fuel injection pump drive gear and
hub assembly have “popped” loose from the
tapered fuel injection pump drive shaft, carefully
remove the drive gear nut (Figure 7-14, (1))
and lock washer (Figure 7-14, (2)).
Figure 7-14
19. Locate the mark (Figure 7-15, (1)) stamped
into the upper outside mounting boss of the fuel
injection pump. Highlight this mark and make a
corresponding mark on the gear case or front
plate.
Figure 7-15
20. Remove the three nuts fastening the fuel
injection pump to the gear case. Remove the
fuel injection pump. Leave the fuel injection
pump drive gear in the gear case and meshed
with the idler gear.
21. If the fuel injection pump requires servicing, it
must be sent to an authorized Yanmar FIE
repair facility for repair and calibration, or
replaced with a new fuel injection pump.
Installation of Fuel Injection Pump
1. Ensure the fuel injection pump drive gear is
aligned with the idler gear using the reference
marks made earlier (Figure 7-16, (1)).
0002183A
(1)
(2)
0002416
(1)
CAUTION
Do not rotate the crankshaft with the
injection pump removed.
0000083en
CAUTION
• NEVER remove or attempt to remove
the tamper-proof devices from the
full-load fuel adjusting screw or the
high-speed throttle limit screw on the
fuel injection pump and governor
assembly. These adjustments have
been made at the factory to meet all
applicable emissions regulations and
then sealed.
• NEVER attempt to make any
adjustments to these sealed
adjustment screws. If adjustments are
required, they can be made only by a
qualified fuel injection shop that will
ensure the injection pump continues
to meet all applicable emissions
regulations and then replace the
tamper-proof seals.
• Tampering with or removing these
devices may void the “Yanmar Limited
Warranty.”
0000146en
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