FUEL SYSTEM
TNV IDI Service Manual
7-15
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.
Do not rotate the crankshaft with the injection
pump removed..
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.
• 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.”
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)).
TNV_IDI_ServiceManual_A4.book 15 ページ ２０１２年２月２４日 金曜日 午前１０時２４分
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