Perkins New 1000 Series, Руководство по ремонту, Страница: 38 / 290

12
38 Workshop Manual, TPD 1350, issue 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 12-2 .
12 Check the valve tip clearances , see operation 12-
5 .
13 Fit the rocker cover , see operation 12-1 .
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).
A
A 0 05 2
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