Westerbeke 3.0KW BPMG-60HZ Service Manual page 31

INSPECTION AND MEASUREMENTS
5) Measurement with Plastigage®
• Oil clearance between crankshaft and metal
bearing
1) Wipe oil out of:
• Crankshaft bearing journals
• Metal bearings (both sides)
• Bearing portions of cylinder and crankcase
2) Install metal bearings into the cylinder and
crankcase.
Note:
Align the tab of the bearing with the notch
®
in
the cylinder and crankcase.
o
3) Install the crankshaft to cylinder.
4) Place a piece of the plastigage on the
crankshaft main bearing journal.
5) Assenble the crankcase.
TIghten the crankcase bolts to the specified
torque in the indicated order.
Torque: : 23-25 N - m (2.3-2.5 kg - m)
(17-18Ib - ft)
: 8-10 N - m (0.8-1.0 kg - m)
(5.8-7.2 Ib - ft)
I
Note:
Do not crank up the crankshaft.
Plastigage
~----;;:;~*7{::~tl~
6) Disassemble the crankcase.
7) Measure the compressed plastigage width at
its widest point.
Standard value Out of the limit to use
0.012 - 0.044 mm
0.0005 - 0.0017 in
0.06 mm (0.002 in) or less
If the oil clearance is out of the limit, measure
inside diameter of the cylinder/crankcase bearing
holders and the crankshaft bearing journals.
There are within the standard value, replace
metal bearings .
• Cylinder/Crankcase bearing holder inside
diameter code
The codes (2 sort) are stamped on the upper
side of the crankcase.
I.D. code Standard value Appling metal bearing
A,X
35.000 - 35.008 mm
Brown color paint
1 .3780 - 1.3783 in
B,Y
35.008 - 35.016 mm
Black color paint
1.3783 - 1.3786 in
Remark: I.D. code A and B - For upper bearing
holder
I.D. code X and X - For lower bearing
holder
~ WESTERBEKE
Engines & Generators
24