AGCO Power 49 - Fitting Valves; Fitting Cylinder Head

3.3.8 Fitting valves
Procedure
1.
Check the valve springs for straightness, length and tension using a spring tester.
2.
Lubricate the valve stems.
3.
Fit the valves in the correct order in the cylinder head.
4.
Fit the valve stem seals.
5.
Fit the springs, spring guides and valve cotters with the aid of a valve spring press.
6.
Tap the end of the valve stems lightly after fitting the valve in order to make sure that the valve
stems are secure.
3.3.9 Fitting cylinder head
Procedure
1.
Measure the length of the cylinder head
bolts.
a) Compare with the correct dimensions.
b) Change any bolts that are too long.
2.
Fit the valve tappets if removed.
3.
Check that the sealing surfaces are clean.
4.
33-49 engines: Fit the cylinder head gasket
and the cylinder head.
5.
66-98 engines: Fit the cylinder head gaskets
and the cylinder heads.
6.
Apply copper silicone seal 8366 62740 on
contact surfaces of the exhaust manifold.
7.
66-98 engines: Make sure that both cylinder
heads are parallel by lightly fastening the
exhaust manifold before tightening the
cylinder head bolts.
The exhaust manifold can become damaged
if the heads are not parallel.
8.
Clean and lubricate the cylinder head bolts.
Fig. 26
9.
Fit the cylinder head bolts.
See the correct tightening order of the
cylinder head bolts.
The tightening order is not marked on the
cylinder heads.
Fig. 27
3. Maintenance
4th Generation Engines 3-19
8370 79492