Operation 3-10 To Tighten The Cylinder Head Setscrews And Fasteners - Perkins 900 Series Workshop Manual

3
To tighten the cylinder head setscrews and fasteners
Special requirements
Special tools
Description
Angle gauge
To tighten the cylinder head setscrews in positions 1 - 8
Cautions:
l The cylinder head setscrews are tightened in four increments, see steps 1 to 4. 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.
1 Tighten setscrews 1 - 8 in the correct sequence (A) to 70 Nm (52 lbf ft) 7,1 kgf m.
2 Repeat step 1 to ensure that all the setscrews are tightened to the correct torque.
3 Tighten further the setscrews by 60° (1 flat), in the correct sequence. A special tool, Part number 21825607
(B2) can be used for this operation, see step 5.
4 Tighten the setscrews, in the correct sequence, a further 60° (1 flat).
5 To tighten the setscrews with the special tool. Fit the tool between the socket spanner and the handle.
Position the stop (B1) against a suitable protrusion on the cylinder head to prevent movement of the degree
dial in a clockwise direction. Turn the pointer to align with the 60° mark on the degree dial. Tighten the setscrew
until the pointer on the tool is aligned with the zero position on the degree dial.
9 10
2 7
1 6
A
50
This document has been printed from SPI². Not for Resale
Part number
21825607
11 12
8 3
5 4
B
C0029
1
Workshop Manual, TPD 1345E, issue 3
900 Series
Operation 3-10
2
C0033A
Continued