Perkins 900 Series Workshop Manual page 61

900 Series
6 If no tool is available, make a suitable mark on the cylinder head in line with a corner of each setscrew (C).
Make another mark, at the correct angle (counter-clockwise), on the edge of the flange of each setscrew.
Tighten each setscrew in the correct sequence until the marks on the flange are next to, and in line with, the
marks on the cylinder head.
To tighten the cylinder head fasteners in positions 9 -12
Cautions:
l These fasteners are tightened in three increments, see steps 7 to 9. Cylinder head fasteners that are
tightened in one operation can loosen in service.
l Do not tighten the cylinder head fasteners again with the engine hot or after a limited period in service.
Note: Early engines had studs and nuts in positions (D10 and D11).
7 Tighten fasteners 9 -12 in the correct sequence (D) to 50 Nm (37 lbf ft) 5,1 kgf m.
8 Repeat step 7 to ensure that the fasteners are tightened to the correct torque.
9 Tighten further the fasteners by 60° (1 flat), in the correct sequence by the method shown for setscrews,
see step 5.
C
Workshop Manual, TPD 1345E, issue 3
This document has been printed from SPI². Not for Resale
9 10
2 7
1 6
D
C0034A
3
11 12
8 3
5 4
C0029
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