Crankshaft Assembly; General Description - Perkins New 1000 Series Workshop Manual

New 1000 Series
5

Crankshaft assembly

5

General description

The crankshaft is a chrome-molybdenum forging which has five main journals for four cylinder engines and
seven main journals for six cylinder engines.
End-float is controlled by thrust washers on both sides of the centre main bearing.
The main bearings have steel backs with an aluminium/tin bearing material except the centre main bearing of
six cylinder engines, which has a bearing material of lead bronze with a lead finish. The main bearing caps are
made of cast iron or spheroidal graphite (SG) iron.
The front and the rear oil seals on early engines are Viton lip seals with a dust lip to the outside of the main lip
and with oil return grooves on the face of the main lip. The rear end oil seal on later engines is a one-piece
assembly.
Warning! Read the safety precautions for "Viton seals" on page 6.
The crankshaft pulley (A3) of the four cylinder engine, usually fitted without a damper, is held in position by a
plain thrust block (A1) and three setscrews (A2). The nose of the crankshaft is serrated for location.
The location of the front pulley of six cylinder engines is by a key in the crankshaft nose and the pulley is held
in position by a tapered rings arrangement (B).
An integral damper, with a rubber insert (B6) is built into the pulley of six cylinder engines and some four
cylinder engines.
Continued
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1 2
6
5
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A B
A0357 A0093
Workshop Manual, TPD 1350E, Issue 4 93
This document has been printed from SPI². Not for Resale