Westerbeke 12C-TWO Operator's Manual page 53

12C/12D TWO SERVICE DATA
I
STANDARDS AND LIMITS
Component
Specified Value
I
Standard Repair limit
inches(mm) inches(mm)
--------------------------
----~
CONNECTING ROD BEARING
Type .................................. Aluminum with Black Metal
Oil Clearance .................... 0.0009- 0.0020(0.022- 0.052) ...... 0 006 (0.15)
Under Size ............................... 0.01, 0.02 (0.25, 0.50)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ____c _ _ _ _ ____c _ _ _ _
~---------
CONNECTING ROD
Type ........................................ .Forged 1-Beam
Bend and Twist.. ........................ Within 0.002 (0.05)
Big End Thrust Clearance .... 0.004 - 0.014 (0.1 - 0.35)
CRANKSHAFT
Type ....................................... Fully Counterbalanced
Bend ........................................ .Within 0.001 (0.03)
End Play ............................. 0.002- 0.007 (0.05- 0.175)
Journal 0.0 ....................................... 1.693 (43) ...................... -0.006 (-0.15)
Pin O.D .............................................. 1.575 (40) ...................... -0.006 (-0.15)
Bearing Oil Clearance ................... (0.022- 0.052)
Under Size Rnishing
Journal Under Size
0.25 .................... 1.6817- 1.6823 (42.715- 42.730)
0.50 .................... 1.6719- 1.6724 (42.465- 42.480)
Pin Under Size
0.25 .................... 1.5636- 1.5642 (39.715- 39.730)
0.50 .................... 1.5537 -1.5543 (39.465- 39.480)
MAIN BEARING
Type .................................. Aluminum with Black Metal
Oil Clearance ............................. No. 2: Flanged Metal
Under Size ............................... 0.01, 0.02 (0.25, 0.50)
VAlVE CAMSHAFT
Driving Method ................................. Gear Drive
Front Journal ................................... Ball Bearing
Journal to Cylinder ................................................................... 0.006 (0.15)
Block Hole Clearance
Lobe Height.. .................................. 1.078 (27.37) ...................... 0.039 (1.0)
Major Diameter of Cam ................. 1.078 (27.37) ...................... 0.039( -1.0)
(Intake and Exhaust)
Oil Clearance .............................................................................. 0.006 (0.15)
Component Specified Value
I
Standard Repair limit
inches(mm) inches(mm)
INJECTION PUMP CAMSHAFT
Driving Method ................................. Gear Drive
Front Journai. ...................... Ball Bearing (Front & Rear)
Lobe Height.. ........ ; .......................... 1.18 (30.0) ........................ 0.027 (0.7)
Major Cam Diameter ......................... 1.18 (30) .............................. (-0.7)
---------·~
TAPPET
Outside Diameter ............................... 0.75 (1 9)
Tappet to Cylinder Block Clearance .......................................... 0.006 (0.15)
PUSH ROD
Bend ........................................ .Within 0.0118 (0.3)
Fuel Solenoid Cut-Off Stroke ............ (10
±
0.5)
STARTER MOTOR
Depth of Brush Undercut.. ............... 0.019 (0.5) ........................ 0.008 (0.2)
Height of Brush ................................. 0.669 (17) .......................... 0.236 (6)
Spring Pressure ........................ 43 Lb/in' (3 Kg/em')
Commutator 0.0 ............................. 1.523 (38.7) ...................... -0.039 (-1.0)
Pinion Shaft End Play ...................... 0.014 (0.5)
NOT£:
T'ae wrist pin used with the piston and connecting rods
has changed. The diameter of the wrist pin has been changed
from 18mm to 21 mm.
Refer to WESTERBEKES Parts Bulletin #2010-2.
48