Perkins 1300 EDi Series, Workshop Manual, Page: 56 / 264

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44 Workshop Manual, TPD 1353E, Issue 3
Peregrine EDi and 1300 Series EDi
To fit valve seat inserts Operation 3-19
1 Fit new valve guides, see Operation 3-15 and Operation 3-16.
2 With the bore of the new valve guide used as a pilot, machine out the old insert. Remove all debris and clean
the insert recess.
3 If the bottom face of the cylinder head has been machined, the insert will have to be surface ground on the
back face to ensure that there is no protrusion of the insert above the bottom face of the cylinder head. After
the back of the insert has been ground, ensure that the outer edge of the back face has a 0,9/1,3 mm (0.035/
0.051 in) chamfer at 30° to the vertical.
Warning! When frozen components are handled, frost proof gloves must be worn. If liquid nitrogen is used to
freeze components, then eye protection must also be worn.
4 Put the valve seat inserts in a deep freeze unit for 30 minutes. This will reduce the size of the valve seat
inserts to allow them to fit more easily into their recesses.
5 With the bore of the valve guide used as a pilot, and with the rear face of the insert towards the cylinder
head, press in the insert (A). Use a hydraulic press or a hand press in one continuous movement. Do not use
a hammer on the insert and do not use lubrication. Ensure that the bottom of the insert is in contact with the
bottom of the recess.
6 Cut the valve seat at an included angle of 90° for 45° valve seats or 120° for 30° valve seats, see Operation
3-18. Lap the valve on to the valve seat. Ensure that the depth of the valve head below the face of the cylinder
head is within the production limits, see Operation 3-12.
Note: Work as near as possible to the minimum figure to allow for future wear on the valve seat.
W115
A
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