Perkins New 1000 Series Workshop Manual page 76

3
9 Tighten the M10 setscrews, in the correct sequence, a further part of a turn according to the length of the
setscrews, see (C) and (D). Short setscrews (S) must be turned a further 120° (2 flats). Medium length
setscrews (M) must be turned a further 120° (2 flats). Long setscrews (L) must be turned a further 150°
(2.5 flats). The four 1/2 UNF setscrews in positions 2, 8, 13 and 18 must be turned 180° (3 flats).
A special tool (E) can be used to tighten all of the setscrews, instead of the method described in step 9. Fit the
tool between the socket and the handle. Position the stop (E1) against a suitable protrusion on the cylinder
head to prevent movement of the degree dial in a clockwise direction. Rotate the pointer to align with the
relevant angle on the degree dial for the length of setscrew. Tighten the setscrew until the pointer on the tool
is aligned with the zero position on the degree dial.
If no tool is available, make a suitable mark on the cylinder head in line with a corner of each setscrew (D).
Make another mark, at the correct angle (counter-clockwise), on the edge of the flange of each fastener
according to the length of the 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.
M 18 M 8
19
L M 9
M 20
M 10
21
S
S S S
22 11 12
C
1
E
62
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M 2 M 13
14
M 3 L
M 1
M 7 M 4
15 M
S S
S S
6 5
17 16
A0053
A0058
S 1/2 UNF
150° 180°
D
Workshop Manual, TPD 1350E, Issue 4
New 1000 Series
Continued
S and M
210°
A0059