Service Data-Standards And Limits - Westerbeke 11.5KW-60Hz Service Manual

SERVICE DATA· STANDARDS AND LIMITS
Component
ENGINE COMPONENTS
Standard
mm (Inches)
Repair Limit
mm (inches)
Compression pressure ............. .427 psi at 280 rpm .................... 384 psi
(30.0 kg/cm') (27.0 kg/cm')
2942 kPa 2648 kPa
Maximum penmissible difference .... 42.7 psi
between averege compression (3.0kg/cm')
pressure 01 all cylinders 294 kPa
Injection timing at BTOC ........................ 17'
Rocker arm bore for shaft ........... 18.910 -18.930
......................................... (0.74449 - 0.74527)
Rocker anm shaft 0.0 .................. 18.880 -18.898
.......................................... (0.74331 - 0.7440)
Clearance between rocker
arm and shaft (011 clearance) ......... 0.012 - 0.050 .......................... 0.200
0.00047 - 0.00197 .................. (0.00787)
Valve stem 0.0 ................................. 0.260 (6.6)
Height 01 valve guide ......................... 0.39 (10)
Valve clearance .............................. 0.25 (0.0098)
Stem to guide clearance
Intake ........................... 0.02 - 0.05 (0.008 - 0.0020) ...... 0.10 (0.0039)
Exhaust.. .................... 0.05 - 0.085 (0.0020 - 0.00335) .... 0.15 (0.0059)
Valve margin ................................... 1.0 (0.039) ...................... 0.5 (0.020)
(valve lip thickness)
Valve sinkage .................................... 0.5 ± 0.25 ................................ 1.5
(0.020 ± 0.0098) .................... (0.059)
Valve seat
Angle ................................................ .45' .
Width ............................... 1.3 -1.8 (0.051- 0.071) ............ 2.5 (0.098)
Valve spring
Free length .................................. .47 (1.85) ........................ ..46 (1.81)
Length under test force ............. 39.1 (1.54)
30.5 (1.20)
Testlorce 39.1 (1.54) ................ 13.9 ± 0.7 .............................. -15%
[kgl (lbf)(N)] 30.6 ± 1.5
136± 7
Testforce 30.5 (1.20) ................... 29
±
2 ................................ -15%
[kgf(Ibf)(N)[ 64 ± 4.4
284 ± 20
Warpage of cylinder head ..................... 0.05 .................................. 0.10
(bottom face) (0.0020) max (0.0039)
Bend (dial reading) of valve push rod ........................................ 0.3 (0.012)
Timing Gear Backlash
Crankshaft gear~dler gear ......... 0.04 - 0.12 .............................. 0.30
(0.0016 - 0.0047) (0.0118)
Idler gear/camshaft gear ............ 0.04 - 0.12 .............................. 0.30
(0.0016 - 0.0047) (0.0118)
Idler gearnuel injection ... : .......... 0.04 - 0.12 .............................. 0.30
pump camshaft gear (0.0016 - 0.0047) (0.0118)
Camshaft gear/P.lO. gear ......... 0.08 - 0.19 .............................. 0.30
. (0.0031 - 0.0075) (0.0118)
Fuel injection pump camshaft ... 0.07 - 0.20 .............................. 0.30
gear and all pump gear (0.0028 - 0.0079) (0.0118)
Lobe height 01 camshaft .............. 35.72 (1.4063 .................. 34.72 (1.3669)
Component
ENGiNE COMPONENTS
Lobe height of fuel injection
Standard
mm (inches)
Repair Limit
mm (inches)
pump camshaft .................................. 44 (1.73) ...................... ..43 (1.3669)
Flatness of flywheel ................... 0.15 (0.0059) max ................ 0.50 (0.0197)
Clearance between tappet
and cylinder block ................................................................... 0.15 (0.0059)
Clearance between camshaft
journal and bushing ................................................................ 0.15 (0.0059)
Clearance between idler .................. 0.03 - 0.07 .............................. 0.20
gear and shaft (0.0012 - 0.0028) (0.0079)
Warpage of cylinder block
top face ....................................... 0.05 (0.0020) max ................ 0.1 0 (0.0039)
Bore In cylinder block ............... 78.0.., (3.07 ''''') ................ 78.2 (3.079)
Taper and out-of-........................ O.Ol (0.0004)max
round of cylinder
Piston Pin 0.0 ............................... 22.944 - 23.00
......................................... (0.90527 - 0.90551)
Diameter of piston
Standard ................................... 77.93 -77.95 .......................... 77.80
(3.0681 - 3.0689) (3.0630)
0.25 (0.0098) ........................... 78.18 -78.20 .......................... 78.05
Oversize (3.0779 - 3.0787) (3.0728)
0.50 (0.0197) .......................... .78.43 - 78.45 .......................... 78.30
Oversize (3.0B7B - 3.0BB6) (3.0B27)
Clearance between piston ............ .0.006 - 0.018 .......................... 0.050
pin and piston (0.00024 - 0.00071) (0.00197)
Clearance between piston ring and groove
No.1 Compression ..................... 0.06 - 0.10 .............................. 0.30
ring {0.0024 - 0.0039) (0.011 B)
No.2 Compression ..................... 0.05 - 0.09 .............................. 0.20
ring (0.0020 - 0.0035) (0.0079)
Oil ring ......................................... 0.03 - 0.7 .............................. 0.20
(0.0012 - 0.0028) (0.0079)
Clearance between ends of piston "ng
No.1 Compression ..................... 0.15 - 0.30 .............................. 1.50
ring (0.0059 - 0.011 B) (0.059)
No.2 CompreSSion ..................... 0.15 - 0.35 .............................. 1.50
ring (0.0059 - 0.013B) (0.059)
Oil ring ........................................ 0.20 - 0.40 .............................. 1.50
(0.0079 - 0.0157) (0.059)
Clearance between ......................... 0.035 - 0.OB6 .......................... 0.300
piston and cylinder . (0.00138 - 0.00339) (0.011 Bl)
Clearance between crankpin .......... 0.025 - 0.072 .......................... 0.150
and connecting rod bearing (0.01)09B - 0.002B3) (0.00591)
Thrust clearance for ......................... 0.1 0 - 0.35 .............................. 0.50
connecting rod big end (0.0039 - 0.013B) (0.0197)
Connecting rod bend/twist
0.05/100 (0.0020/3.94 max.)
. 0.15/100 (0.0059/3.94 max.)
~ WESTERBEKE
Engines & Generators
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