Komatsu PC88MR-10 Shop Manual page 1062

50 Disassembly and assembly
Engine and cooling system
3. Injector assembly
a When replacing the injector assembly or
engine controller assembly, write the
character string into the engine controller
according to the following procedure. For
details, see "Testing and adjusting", "Writing
compensation values at replacement of
injector and engine controller".
Note the number of cylinder to which a new
injector is installed and character string (M)
listed on the QR code tab at the top of the
injector as a set.
a Read character string (M) in the order
indicated by the arrow in the figure.
a Be sure to check that the noted character
string is correct.
Write the noted character string into the
engine controller.
a Be sure to write the noted character string
into the cylinder number column of the
cylinder to which the injector is installed.
a If the character strings are not written
correctly, the engine may not operate
normally.
(Reference: The QR code or character
string indicates the compensation value
for fuel injection of the injector, which is
specific to each injector.)
50-34
1) Install gasket (91) to injector assembly (85).
2) Install O-rings (92) and (93) to injector
assembly (85).
a Do not put the O-ring in spill groove (e).
3) Apply engine oil to O-ring (92) and head side
inserting hole of injector assembly (85).
O-ring and head side inserting
hole:
Engine oil
4) Face the fuel inlet hole of injector assembly
(85) to the fuel inlet manifold side, and insert
it into the cylinder head while inserting
injector holder (84) into (f) part of the injector.
a Do not let the gasket at the tip of the
injector nozzle fall.
5) Tighten the mounting bolt (83) of injector
holder (84) lightly.
a Apply Loctite 204 to threaded part of
mounting bolt (83).
Threaded part:
Adhesive (Loctite No. 204 or
equivalent)
a Use the new bolts (83) (4 pieces).
a Do not reuse the bolt and replace it with a
new one. If it is reused, the engine oil
may enter the fuel return circuit.
a Do not tighten the bolts excessively.
PC88MR-10