Bobcat 741 - Page 255

CYLINDER HEAD (Cont'd)
Disassembly
NOTE: There may be a
shim under the head gasket.
Use the shim over again
or replace it with the
same size shim.
Remove the valve cap (Item 1) [A] and the valve spring
collet (Item 2) [A].
Remove the valve spring retainer (Item 3) [A].
Remove the spring (Item 4) [A].
Remove the seal (Item 5) [A] and the valve (Item 6) [A].
Remove the thermostat [B].
Servicing
Use the tool listed for the following procedure:
MEL 1098 - Valve Lapper
Clean the surface of the cylinder head.
Put a straight edge (Item 1) [C] on the cylinder head.
NOTE: Do not put the straight edge across the
combustion chamber.
Put a feeler gauge (Item 2) [C] between the straight edge
and the surface of the cylinder head.
The maximum distortion of the cylinder head surface is ±
0.002 inch (± 0,005 mm).
If the measurement is more than the specifications, the
cylinder head must be planed.
NOTE: Place a soft brass rod through the injector
hole and tap the combustion chamber out
before planing the head. Plane the same
amount from the
bottom side of the
combustion chamber before
installing it
back in the head.
Clean the valve surface.
Measure the width of the valve seat [0].
Revised Mar. 89
-7C-19-
A
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9 88
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Cap Collets Retainer
Spring
Valve Seal
D
o
I 8-04122
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00
B-03632
741,742,743, 7430S Bobcat Loader
Service
Manual