FMC Technologies W11 - 12 Critical Clearances; Table 8: Clearance Chart

Doc No: OMM50002312
Rev: C Page 43 of 54
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12.0 Critical Clearances
When maintenance which requires disassembly of the power end is performed, the
following clearances should be checked to see if they are within factory specification or
within maximum allowable limits. Additional clearance is allowed for component wear.
This additional clearance is a maximum of .002 inches of total diametric wear that can
be added to the clearance values in Table 8. For radial clearance, use ½ of the total
diametric value.
Table 8: Clearance Chart
DESCRIPTION
W11
Crankshaft
Throw Diameter (Stroke)
2.75
Crankshaft Pin or Journal (OD)
3.4990/3.4995
Connecting Rod / Crank Clearance (Max. Total)
0.003
Crosshead Diameter (OD)
3.121/3.123
Crosshead
Cylinder Bore (ID)
3.1245/3.1260
Crosshead to Bore Clearance (Max. Total)
0.005
Wrist Pin
Bushing Bore (ID)
1.2505/1.2515
Wrist Pin to Bore Clearance (Max. Total)
0.002
* Clearances shown are total diametric values: For radial clearance,
use ½ of the value shown.
** All dimensions below in inches
Metric Conversion: 1 inch = 25.4 mm
1 mm = 0.03937 inches