Camshaft Journal / Support Bore Specifications - Lombardini LDW 502 Workshop Manual

COMPILER TECO/ATL
REG. CODE
1-5302-351
DISASSEMBLY/REASSEMBLY
CAMSHAFT REMOVAL/ REPLACEMENT
PREPARATION: Remove the rocker arm assembly, remove the
camshaft end cover(1), remove the camshaft timing pulley, remove
the governor assembly, remove the fuel lift pump, remove the fuel lift
pump push rod.
REMOVAL: Gently and slowly, slide the camshaft toward the
flywheel end of the engine. Slight rotation(s) may be required to
prevent binding of the camshaft lobes against the camshaft bearing
surface bores.
INSPECTION: Clean the camshaft with solvent and dry with
compressed air. Inspect all lobes and journals for wear, seizure,
pitting, etc. Refer to the data presented in the following for
dimensional analysis of the camshaft. Replace the camshaft as
required.
INSTALLATION: Liberally oil the cylinder head camshaft supprt
bores and the camshaft journals. Install the camshaft into the
cylinder head, gently rotating the camshaft as required to allow
installation. Replace O-ring(2) and replace the camshaft cover(1).
NOTE: The flywheel end of the camshaft includes a bolt-on
eccentric(3) for purposes of lift pump drive. Torque the eccentric(3)
to 80 Nm.
CAMSHAFT JOURNAL / SUPPORT MEASUREMENT
After thoroughly cleaning the camshaft and cylinder head bores,
measure the critical diameters with calibrated micrometers as
shown.

CAMSHAFT JOURNAL / SUPPORT BORE SPECIFICATIONS

A 37.035/37.060mm
B 36.975/37.000mm
A-B= 0.035/0.085mm (USEABLE Limit= 0.170mm)
NOTE: The camshaft journal and cylinder head camshaft bore
dimensions are identical for all LDW-FOCS series engines- LDW
502, LDW 602, LDW 702, LDW 903, LDW 1003, LDW 1204, LDW
1404, LDW 1204/T.
CAMSHAFT LOBE MEASUREMENT PROCEDURE
After thoroughly cleaning the camshaft, measure the camshaft lobes
from the circle base to the top of the lobe (maximum possible
dimension) using a calibrated micrometer.
MODEL N° DATE OF ISSUE
50563 04.90
DATE ENDORSED
04
REVISION
15.11.99
II
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