13
NOTE(S):
a. Same wear allowance applies to undersized shafts and bearings.
b. Re-manufactured service compressors can be built with undersized main
bearings and connecting-rod bearings. Compressors with undersized bear-
ings are identified by the letter A, B, or C stamped on the compressor name-
plate after the model number, and on both ends of the crankshaft.
A = 0.010 in., B = 0.020 in., C = 0.030 in. undersized bearings.
Replacement bearing heads for compressors with undersized shafts must be
field-modified with proper undersized bearing.
c. Replace thrust and bearing washers when end clearance exceeds maximum
listed:
d. Gap dimension increases (by up to 10%) when cylinder bores have been
honed (if necessary) on 5F, H re-manufactured compressors.
Table 5 — Wear Limits—5F, H Compressors
COMPRESSOR PART
COMPRESSOR
5F20,30,40,60 5H40,46,60,66,80,86,120,126
FACTORY TOLERANCES (in.) MAXIMUM
ALLOWABLE
WEAR (in.)
FACTORY TOLERANCES (in.) MAXIMUM
ALLOWABLE
WEAR (in.)
a
MAX MIN MAX MIN
SEAL END
b
Main Bearing Diameter — 5F20, 30 1.6264 1.6250 0.002 2.6264 2.6250 0.001
— 5F40, 60 2.0636 2.0618 0.001
Journal Diameter — 5F20, 30 1.6240 1.6233 0.003 2.6235 2.6225 0.002
— 5F40, 60 2.061 2.060 0.002
PUMP END
b
Main Bearing Diameter — 5F20, 30 1.6264 1.6250 0.002 2.2530 2.2502 0.001
(Assembled) — 5F40, 60 1.6264 1.6250 0.001 — — —
Journal Diameter 1.6240 1.6233 0.002 2.249 2.248 0.002
CENTER (5H80,86,120,126)
b
Main Bearing Diameter — — — 2.6264 2.6250 0.001
Main Bearing Thickness — — — — 0.0942 0.001
Journal Diameter — — — 2.6235 2.6225 0.002
CONNECTING ROD
b
Bearing Diameter 1.6255 1.6245 0.002 2.2505 2.2495 0.002
Bearing Thickness — 0.06225 0.001 — 0.06225 0.001
Crankpin Diameter 1.6240 1.6233 0.003 — 2.248 0.002
Seal End Bearing Washer Thickness 0.131 0.129
c
0.188 0.186
c
Seal End Thrust Washer Thickness 0.157 0.155
c
0.188 0.186
c
Pump End Bearing Washer Thickness 0.131 0.129
c
0.188 0.186
c
CYLINDERS
Bore
Piston Diameter — Steel, Standard Stroke
— Aluminum, Long Stroke
2.501 2.500 0.003 3.2515 3.2505 0.003
— 2.4980 .003 3.2485 3.2480 0.003
Body — — — 3.241 3.240 0.003
Ring Groove (OD) — — — 3.235 3.232 0.003
Piston Pin Diameter — 0.7498 0.001 — 0.9998 0.001
Piston Pin Bushing 0.7500 — 0.001 1.000 — 0.001
Piston Ring End Gap (compression and oil)
d
.009 0.004 .030
d
0.017 0.007 0.030
d
PISTON RING SIDE CLEARANCE
Compression Side 0.0015 0.0005 0.003 0.0015 0.0005 0.003
Oil Side 0.0012 0.0002 0.0012 0.0002
OIL PUMP
Axial Clearance 0.0015 0.0005 0.0025 0.0015 0.0005 0.0025
Drive Shaft Diameter 0.4361 0.4356 — 0.4361 0.4356 —
Drive Shaft Bushing Diameter (10) 0.4375 — — 0.4375 0.4370 —
Drive Shaft Diameter (5H120 and 126) — — — 0.6250 0.6240 —
Drive Shaft Bushing Diameter (ID — 5H120
and 126)
— — — 0.6270 0.6260 —
SUCTION VALVE
Suction Valve Disc (depth of wear below
face)
— — .005 — — 0.005
Suction Valve Seat — .012 .002 — 0.012 0.002
DISCHARGE VALVE
Discharge Valve Disc (depth of wear below
face)
— — .005 — — 0.005
Discharge Valve Seat — .012 .002 — 0.012 0.002
CRANKSHAFT END CLEARANCE (in.)
5F20-5F60 0.011 to 0.035
5H40,46 0.010 to 0.036
5H60,66 0.011 to 0.037
5H80,86 0.014 to 0.042
5H120,126 0.014 to 0.044
LEGEND
OD — Outside Dimensions
ID — Inside Dimensions
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