Perkins Phaser Series - Page 30

12 CYLINDER HEAD ASSEMBLY
8 Fit the valve spring caps.
Caution:
Ensure that the valve springs are
compressed squarely or damage can occur to the
valve stem.
9 Fit the valve spring compressor, compress the
valve springs and fit the collets. Remove the valve
spring compressor.
10Fit the rocker assembly, operation 12A-02.
11Check the valve tip clearances, operation
12A-05.
12Fit the rocker cover, operation 12A-01.
Note: If other or all of the valve springs are to be
changed, they can be changed two cylinders at a
time. The sets of cylinders are:
For 4 cylinder engines: 1 and 4, 2 and 3
For 6 cylinder engines: 1 and 6, 2 and 5, 3 and 4
If the rocker assembly has been removed, piston
TDC can be found as follows:
1 Fit the valve spring compressor and compress
the valve springs to open the valve.
2 Rotate the crankshaft, by hand, in the normal
direction of rotation until the piston touches the
valve.
3 Continue to rotate the crankshaft, and at the
same time, release pressure on the valve spring
compressor until the piston is at TDC (A).
PA052
12A.10 Perkins Phaser/1000 Series, April 1995