TM 5-3810-294-34
Table 1-4. Repair and Replacement Standards (Continued)
Manufacturing Dimensions
Maximum allowable
and tolerances inches
wear or clearance
Component
From
To
maximum
VALVE ROCKER ARM CLEAHANCE
ON SHAFT
....................................................... 0.0015
0.0040
VALVE TIMING:
Intake opens (before TDC) degree .......................
16
Intake closes (after BDC) degrees ........................
44
Exhaust opens (before BDC) degrees ..................
50
Exhaust closes (after TDC) degree .......................
20
Intake valve timing checking clearance ................. 0.023
OIL PUMP:
Body gear end clearance ...................................... 0.0025
0.0055
Pump body to gear clearance ............................. 0.0023
0.0025
Pump shaft diameter ............................................. 0.4980
0.4979
Pump shaft clearance In bore (Max) ......................
0.0018
Body gear backlash................................................ 0.003
0.006
Idler gear to shaft clearance................................... 0.0015
0.0035
Drive gear backlash ............................................... 0.005
0.014
Note Oil pressure is from 8 to 45 psi
(engine at low idle and maximum governed
speed, respectively)
FLYWHEEL HOUSING:
Permissible run-out ................................................ 0.000
0.010
CARRIER ENGINE
General:
Bore
....................................................... 4 1/2
Stroke
....................................................... 4 5/16
Displacement - cubic inches ................................. 549
Compression ratio ................................................. 7.57:1
Gage Compression - 145 pal at 200 rpm
Firing order 1-8-7-3-6-5-4-2
CRANKSHAFT:
Main journal diameter ............................................ 3.123
3.124
Crankpin diameter ................................................. 2.623
2.624
Bearing clearance .................................................. 0.0014
0.0044
Crankshaft end play ............................................... 0.004
0.009
Thrust taken by Intermediate
Hardening method........................................ Tocco
Main bearing bore in crankcase (line
reamed with cape in place) ............................ 3.316
3.317
CAMSHAFT:
Camshaft journal diameter
Front
....................................................... 2.347
2.348
Second ....................................................... 2.316
2.317
Third
....................................................... 2.290
2.291
Fourth
....................................................... 2.247
2.248
Camshaft bearing clearance .................................. 0.001
0.003
Camshaft end play ................................................. 0.0035
0.0115
Thrust taken by Thrust flange
Timing gear backlash ............................................. 0.001
0.008
CYLINDER HEAD:
Over-all height, inches............................................ 4.372
4.378
4.362
CONNECTING RODS:
Connecting rod bearing end clearance .................. 0.010
0.018
Connecting rod bearing clearance ......................... 0.0017
0.0042
Material
Recommended piston clearance Aluminum Alloy . 0.0035
0.0035
Piston clearance check with 1/2 inch
feeler gage ribbon
Ribbon thickness .................................................... 0.0035
0.0035
Clearance pull - pounds .........................................
10
12
14
PISTON PINS:
Length
....................................................... 3.262
3.265
Diameter
....................................................... 1.3118
1.3119
Pin fit (room temperature 70-F)
1-8
