Cylinder Head; Injector Projection - Kohler KD225 Workshop Manual

21
Engine KD 225
1st phase: tighten all the bolts to a 30 Nm torque value in a
crossed fashion.
2nd phase: unscrew all the bolts by 180°.
3rd phase: tighten all the bolts to a 20 Nm torque value in a
crossed fashion.
4th phase: make a 52° turn in the same order as the 3rd
phase.
5th phase: tighten the 2 side bolts (5) to a 10 Nm torque value
Engine KD 315
1st phase: tighten all the bolts to a 30 Nm torque value in a
crossed fashion.
2nd phase: unscrew all the bolts by 180°.
3rd phase: tighten all the bolts to a 20 Nm torque value in a
crossed fashion.
4th phase: make a 72° turn in the same order as the 3rd
phase.
5th phase: tighten the 2 side bolts (5) to a 10 Nm torque value
22
KD 225_315_350_400_440 Workshop Manual_cod. ED0053029330_1° ed_ rev. 00
Do not demount when hot or the part could become deformed.

Cylinder head

If the surface of the cylinder head is deformed, flatten it by removing
0.2 mm of material at most.
Always replace the seal. See figs 46-47-48-49-50 when selecting the
thickness. The bolts must be tightened in different phases for the va-
rious engines, in compliance with the order shown in the figure:
First tighten the 4 screws M10, then the 2 side screws M6.
Lubricate the shanks of the bolts, under their heads and the washers
with engine oil. Do not use too much oil. Oil that deposits in the thre-
aded hole on the cylinder block could become pressurized during the
tightening phase, sensibly diminishing the driving force. Always make
sure that the holes on the cylinder block are dry and clean.
Engine KD 350
1st phase: tighten all the bolts to a 30 Nm torque value in a
crossed fashion.
2nd phase: unscrew all the bolts by 180°.
3rd phase: tighten all the bolts to a 20 Nm torque value in a
crossed fashion.
4th phase: make a 60° turn in the same order as the 3rd
phase.
5th phase: tighten the 2 side bolts (5) to a 10 Nm torque value
.
For KD 400 and 400 engines
1 phase: tighten all screws crosswise to 20Nm.
st
2 phase: tighten the screws in the same order to 40Nm.
nd
3 phase: tighten all screws in the same order to 50Nm.
rd
4 phase: following the same order as in phase 3, rotate 60°.
th
5 phase: following the same order as in phase 4, rotate 60°.
th
6 phase: tighten the 2 side screws (5) to 10 Nm
th
.

Injector projection

The end of nozzle A should project 2,5 mm for KD 225-315-350 and
3,0÷3,5 mm for KD 400-440 from the cylinder head plane.
Adjust with copper gaskets B with thickness of 0.5, 1 and 1.5 mm
DISASSEMBLY/REASSEMBLY
8
- 27 -