Cub Cadet Yanmar 3TNV72 - Manual (Page 165)

FUEL SYSTEM
7-4 TNV IDI Service Manual
Before You Begin Servicing
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
CAUTION
Never use a steel wire brush to clean
fuel injectors. Damage to the nozzle and
other components is likely to result.
0000172en
CAUTION
Do not loosen or remove the four bolts
retaining the fuel injection pump drive
gear to the fuel injection pump hub. Do
not disassemble the fuel injection pump
drive gear from the hub. Correct fuel
injection timing will be very difficult or
impossible to achieve.
0000031en
CAUTION
Remove or install the high-pressure fuel
injection lines as an assembly whenever
possible. Disassembling the
high-pressure fuel injection lines from
the retainers or bending any of the fuel
lines will make it difficult to reinstall the
fuel lines.
0000047en
CAUTION
After marking the position of the pump
drive gear, do not rotate the engine
crankshaft. Rotating the crankshaft will
cause the fuel injection pump to become
misaligned.
0000048en
CAUTION
Do not rotate the crankshaft with the
injection pump removed.
0000083en
CAUTION
The fuel return line is a one-piece
assembly. Use care not to bend or twist
the fuel return line.
0000171en
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