Perkins 1103 Disassembly And Assembly page 42

42
Disassembly and Assembly Section
Table 8
Tool for the Inlet Valve Seat Inserts
Callout
1 1.5 mm (0.06 inch)
2 20 mm (0.80 inch)
3 6.8 mm (0.268 inch) to 7.1 mm (0.279 inch)
4 100 mm (3.94 inch)
5 38.1 mm (1.500 inch) to 38.3 mm (1.508 inch)
6 46.25 mm (1.82 inch) to 46.5 mm (1.83 inch)
7 Maximum radius 1.4 mm (0.055 inch)
8
Maximum radius 1.5 mm (0.06 inch)
9 1.5 mm (0.06 inch)
10
8.77 mm (0.345 inch) to 8.80 mm (0.346 inch)
Table 9
Tool for the Exhaust Valve Seat Inserts
Callout
1 1.5 mm (0.06 inch)
2 20 mm (0.80 inch)
3 7.2 mm (0.283 inch) to 7.5 mm (0.295 inch)
4 100 mm (3.94 inch)
5 34.38 mm (1.353 inch) to 34.58 mm
6 41.75 mm (1.643 inch) to 42.00 mm
7 Maximum radius 1.4 mm (0.055 inch)
8 Maximum radius 1.5 mm (0.06 inch)
9 1.5 mm (0.06 inch)
10 8.77 mm (0.345 inch) to 8.80 mm (0.346 inch)
3. Put the appropriate valve seat insert in position.
Install the special tool that was manufactured
previously, through the valve seat insert and
use the pilot bore of the valve guide in order to
center the tool and the insert into the recess.
Lightly tap the valve seat insert in order to start
the installation. Press the valve seat insert into
the recess with a suitable press. Ensure that the
bottom of the valve seat insert is against the
bottom of the recess.
4. Repeat Step 3 for the remaining valve seat inserts.
Dimension
Dimension
(1.361 inch)
(1.653 inch)
5. After installing the valve guides and valve seat
inserts, the valve guides must be reamed and
the valve seat inserts must be cut to the finished
diameter. The valve guides and valve seat
inserts are cut and reamed in one operation. This
procedure ensures the concentricity of the valve
seat to the valve guide in order to create a good
seal. Refer to the Specifications Manual, "Cylinder
Head Valves" for the finished diameter of the valve
guides and valve seat inserts.
Illustration 78
Note: Ensure that the 27610030 Valve Guide/Valve
Seat Reamer/Cutter is assembled correctly with the
correct angle of cutter (3) for the valve seat toward
the cylinder head.
Note: Ensure that the cutter (3) for the valve seat is
not allowed to contact the valve seat insert until the
valve guide has been reamed to the correct size.
SENR9779-02
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