Inspection - Westerbeke 11.5KW-60Hz Service Manual

INSPECTION
CYLINDER HEAD AND VALVE MECHANISM
1. Cylinder head.
Using a heavy accurate straight edge and
a feeler gauge, check the bottom face for warpage in three
positions, lengthwise, two crosswise and two widthwise as
shown in the illustration. If warpage exceeds the limit,
reface the bottom face with a surface grinder.
1~
FOR WEAR
INSPECTFO
WEAR AND
CONTACT
CHECK ENDS
FOR WEAR
AND DAMAGE
CHECK
THREADS
CHECK OIL HOLES FOR CLOGGING
CHECK FOR WEAR
IN BORE .
~~""'f--·'NSPECI
FOR WEAR
INSPECT FOR
INSPECTAND
SPRING
AND CLOGGED OIL HOLES
CHECK VALVE SEATS
FOR PROPER CONTACT
AND
. INSPECT FOR CRACKS, OIL
OR COOLANT LEAKS. CLEAN
OFF SCALE AND CARBON
DEPOSITS
CHECK FOR GALLING
AND WEAR
w.._--INSPECT FOR RIDGES
. OR DAMAGE
k----INSPECT FOR BEND
WARPAGE· CYLINDER HEAD BOTTOM FACE
STANDARD 0.0020 In (0.05mm) MAXIMUM
LIMIT 0.00391n «0.10mm)
~:1i.YiNSP'ECTIING
THE
CYLINDER HEAD
BOTTO,,", FOR
WARPAGE·
2. Rocker arms and rocker shaft. Measure the bore in the
rocker arm for the rocker shaft and the diameter of the
rocker shaft to find the clearance between the arm and the
shaft. If the clearance has reached tho limit, replace the
rocker
arm.
If it exceeds the
limi~
replace both arm and
shaft.
BORE IN ROCKER ARM FOR SHAFT
STANDARD 0.74449·0.74527 in (18.910 • 18.930mm)
DIAMETER OF SHAFT FOR ARM
STANDARD 0.74331 • 0.74401 In (18.880 . 18.898mm)
CLEARANCE BETWEEN ROCKER ARM AND SHAFT
STANDARD 0.00047·0.0019710 (0.012' 0.050mm)
LIMIT 0.00787 (0.200mm)
MEASURING ROCKER ARMS
AND ROCKER SHAFT
Engines & Generators
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