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
Valve Springs
Outside dia -------------------------------- ------------------
1 5/16
Wire size -------------------------------- ---------------------
0.172
Spring length (valve closed) under load of -----------
1.67
51.3 to 58.3 lbs.
Tension limit (min weight closed) ----------------------
46.27 lbs
Spring length (valve open) -------------------------------
1.226
under load of 130 to 144 lbs.
Tension limit (min weight open) ------------------------
117 lbs
Cylinder dia-------------------------------- ------------------
4.249
4.251
0.008
Main bearing bore in block-------------------------------
3.1913
3.1920
Tappet hole dia -------------------------------- -------------
1.125
1.126
Table 4. Carrier Engine Repair and Replacement Standards
Manufacturer's
dimensions and
Desired
Maximum
Maximum
tolerances in
clearance
allowable
allowable
inches
wear
clearance
Min.
Max.
Min.
Max.
CARRIER ENGINE
Piston-to-cylinder clearance -----------------------------
0.008
0.012
Piston pin hole dia -------------------------------- ---------
1.7499
1.7501
0.0004
Pin-to-piston clearance -------------------------------- ---
0.0001
0.0002
0.0004
Ring groove width:
1st-------------------------------- ------------------------
0.097
0.098
0.003
2d and 3d -------------------------------- --------------
0.1265
0.1275
0.003
4th -------------------------------- -----------------------
0.2505
0.2515
0.003
Ring land dia:
1st-------------------------------- ------------------------
5.333
6.337
2d -------------------------------- ------------------------
5.339
5.343
3d -------------------------------- ------------------------
5.344
5.348
4th -------------------------------- -----------------------
5.344
5.348
Skirt Dia (perpendicular-to-pin bore)-------------------
5.367
5.369
Piston Pins
Length -------------------------------- ------------------------
4.524
4.539
Diameter -------------------------------- ---------------------
1.7498
1.7500
0.0004
Fit in piston -------------------------------- ------------------
0.0001
0.0002
0.0003
Desired fit (piston heated)--------------------------------
Light push
Bushing hole dia, fin-------------------------------- -------
1.7503
1.7505
0.0030
Clearance in bushing-------------------------------- ------
0.0003
0.0007
0.0030
Length-bushing-------------------------------- -------------
1.927
1.947
Piston Rings
Ring width:
1st-------------------------------- ------------------------
0.0925
0.0935
0.0030
2d and 3d -------------------------------- --------------
0.123
0.124
4th -------------------------------- -----------------------
0.248
0.249
AGO 6819A
191
