Kohler KD 500, Руководство по ремонту

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41
40
11
heck the time it takes to drop. The pressure must drop to 150 to
100 Kg/cm² withinn 6 to 40 seconds.
- replace the nozzle if it drops in less than 6 seconds.
- if it takes longer than 40 seconds to drop, make sure that there
are no carbon deposits in the nozzle and that the return holes
are not clogged.
Demounting and remounting
Loosen the ring nut that fixes the nozzle using a torque wrench
and as device like the one shown in fig. 41 which relieves the
pressure exercised by the spring on the ring nut.
1. Visual inspection: make sure that the needle housing is not
deformed or excessively rough.
The nozzle body must not show signs of wear or damage. The
holes must be free from carbon residues.
2. Smoothness test: the nozzle needle, which will have been
previously immersed in impurity-free fuel, should be inserted into
the body of the nozzle. Noz extract it by up to a third of the guide
length, holding the nozzle in a vertical position. The needle must
drop back into its housing thanks to its actual weight alone.
Remount the injection in compliance with the order indicated
in fig. 38. Make sure that the plugs and centering pins on the
spacer (N° 8 fig. 38) match the relative holes in the housings.
Tighten the ring nut that fixes the nozzle to a value of:
4,6 ÷ 5,6 kgm (45 ÷ 55 Nm)
Injection equipment
Workshop Manual KD500 _ cod. ED0053029390 - 1° ed _rev. 00