Table 3. Crane Engine Repair and Replacement Standards - Continued
Manufacturer's
dimensions and
Desired
Maximum
Maximum
tolerances in
clearance
allowable
allowable
inches
wear
clearance
Min.
Max.
Min.
Max.
CRANE ENGINE-Continued
Piston Pins
Length -------------------------------- ------------------------
3.620
3.625
Pin dia -------------------------------- ------------------------
1.2498
1.2500
Pin-to-piston clearance -------------------------------- ---
0.0001
0.0002
0.0003
(light push)
Bushing id (finished)-------------------------------- -------
1.2503
1.2506
Bushing length-------------------------------- --------------
1.552
1.572
Pin-to-bushing clearance-------------------------------- -
0.0003
0.0008
0.0025
Connecting Rods
Length (center-to-center)-------------------------------- -
8.246
8.248
Bushing hole dia-------------------------------- ------------
1.437
1.438
Bushing od-------------------------------- -------------------
1.442
1.444
Bearing hole dia -------------------------------- ------------
2.7130
2.7135
Bearing thickness -------------------------------- ----------
0.0748
0.0753
0.003
Width at bearing end-------------------------------- ------
1.6775
1.6795
End play on crankshaft -------------------------------- ---
0.006
0.010
0.015
Crankshaft
Main journal dia -------------------------------- ------------
2.9985
2.9995
0.0040
Main journal-to-main bearing clearance --------------
0.0012
0.0030
0.0040
Crankshaft end play -------------------------------- -------
0.005
0.008
0.010
Connecting rod journal-------------------------------- ----
2.560
2.561
0.002
Rod journal-to-rod bearing clearance------------------
0.0014
0.0026
0.0040
Rod journal length -------------------------------- ---------
1.6855
1.6876
Camshaft
Journal dia (all) -------------------------------- -------------
2.242
2.243
0.002
Cam lift:
Intake-------------------------------- --------------------
0.3395
0.0120
Exhaust -------------------------------- -----------------
0.3520
0.0120
Camshaft bushing id -------------------------------- ------
2.2445
2.2450
0.0020
Camshaft-to-bushing clearance-------------------------
0.0015
0.0030
0.0050
Camshaft end play-------------------------------- ---------
0.005
0.009
0.012
Valves:
Valve length (overall) -------------------------------- ------
6 1/16
Stem dia-------------------------------- ----------------------
0.4335
0.4345
0.0020
Head dia:
Intake-------------------------------- --------------------
1.995
2.005
Exhaust -------------------------------- -----------------
1.620
1.630
Valve and seat angle-------------------------------- ------
45
Stem clearance:
Intake-------------------------------- --------------------
0.0015
0.0035
0.0045
Exhaust -------------------------------- -----------------
0.0045
0.0065
0.0075
Valve Guides:
Length:
Intake-------------------------------- --------------------
2 13/16
Exhaust -------------------------------- -----------------
3 3/8
Outside dia:
Intake and exhaust-------------------------------- ---
0.813
0.814
Inside dia:
Intake-------------------------------- --------------------
0.4360
0.4370
0.0020
Exhaust -------------------------------- -----------------
0.4390
0.4400
0.0020
Valve seat face (top)-to-top of guide:
Intake-------------------------------- --------------------
1 7/8
Exhaust -------------------------------- -----------------
1 5/16
AGO 6819A
190
