Perkins New 1000 Series Workshop Manual page 63

3
New 1000 Series
9 Fit the valve spring caps.
Caution: Ensure that the valve spring is compressed squarely or damage can occur to the valve stem.
10 Fit the valve spring compressor, compress the valve spring and fit the collets. Remove the valve spring
compressor.
11 Fit the rocker assembly, see Operation 3-3.
12 Check the valve tip clearances, see Operation 3-6 for four cylinder engines or Operation 3-7 for six cylinder
engines.
13 Fit the rocker cover, see Operation 3-2.
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:
l For 4 cylinder engines: 1 and 4, 2 and 3
l 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 (B).
B
A0052/1
Workshop Manual, TPD 1350E, Issue 4 49
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