D343 ENGINE Caterpillar


Air Compressor (9L4092) (BW281020)

Usage:

1 Torque-head bolt ... 18-21 lb. ft.2,49-2,90 mkg

2 Cylinder block assembly:

Cylinder bore ... 2.5005-2.5015 in.(63,51-63,54 mm

Maximum permissible out-of-round ... .002 in.0,05 mm

Maximum permissible taper ... .002 in.0,05 mm

Piston-to-cylinder wall clearance ... .0020-.0035 in.0,05-0,89 mm

3 Piston rings:

Gap measured in cylinder bore of 2.501 in. (63,52 mm)-all rings ... .005-.015 in.0,13-0,38 mm

Narrow ring-groove clearance ... .002-.004 in.0,05-0,10 mm

Wide ring-groove clearance ... .0035-.0055 in.0,09-0,14 mm

4 Piston pin diameter ... .5310-.5312 in.13,48-13,49 mm

Connecting rod pin bearing bore ... .5314-.5317 in.13,50-13,51 mm

Maximum permissible clearance ... .0015 in.0,04 mm

5 Connecting rod center-to-center dimension ... 4.186-4.190 in.106,32-106,42 mm

6 Connecting rod crankshaft bearing bore ... 1.1253-1.1263 in.28,58-28,61 mm

Maximum permissible clearance ... .0021 in.0,05 mm

Crankshaft journal diameter ... 1.1242-1.1250 in.28,54-28,57 mm

7 Front main bearing bore ... 1.380-1.382 in.35,05-35,10 mm

Crankshaft journal diameter ... 1.3779-1.3783 in.35,00-35,01 mm

8 Rear main bearing bore ... 2.1678-2.1698 in.55,15-55,17 mm

Crankshaft journal diameter ... 2.1653-2.1658 in.55,00-55,01 mm

9 Torque-drive gear retaining nut

Initial ... 75±10 lb. ft.10,4±1,4 mkg

Tap with hammer and retighten to ... 75±10 lb. ft.10,4±1,4 mkg

10 Torque-connecting rod bolt ... 100-115 lb. in.115,3-132,6 cm.kg

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