Cylinder Head; Camshaft And Bearings - Perkins 2800 Workshop Manual

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Cylinder head

Thickness of cylinder head (new) .. ... ... ... ... ... ... ... ... ... ... ... ... ... . 120,00 +/- 0,15 mm (4.724 +/- 0.006 in)
Minimum thickness for a used cylinder head . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..119,50 mm (4.705 in)
Flatness of cylinder head: The cylinder head must be flat to within a total of 0,13 mm (0.005 in). Additionally,
the cylinder head must be flat within a maximum of 0,03 mm (0.001 in) across any 76,2 mm (3.00 in) span.

Camshaft and bearings

Diameter of camshaft journal (E3) . ... ... ... ... ... ... ... ... ... ... ... ... ... ... 84,85 +/- 0,02 mm (3.341+/- 0.001 in)
Exhaust lobe lift.. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..8,515 mm (0.3352 in)
Inlet lobe lift ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..9,431 mm (0.3713 in)
Injector lobe lift... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 10,451 mm (0.4114 in)
Maximum permissible difference between the actual lobe lift (E7)
and the specified dimension .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..1,0 mm (0.0394 in)
To obtain the lobe lift (E7) proceed as follows: Measure the lobe height (E5) and measure the base circle (E6).
Subtract the base circle from the lobe height to give the lobe lift.
12 Workshop Manual, TSD3450E, Issue 1