SD7H15 Type C Service Manual
Prepared July 1999 – Application Engineering
13
5. Service Operations – Cylinder head
5.1 Cylinder head, valve plate removal and installation.
1.
Be sure all internal compressor pressure has been relieved. This can be
achieved by undoing the oil plug slowly.
2.
Remove cylinder head bolts.(Fig.19)
3.
Use a small hammer and gasket scraper to separate the cylinder head
from the valve plate. Be careful not to scratch the gasket surface of the
cylinder head.
4.
Carefully lift the cylinder head from the valve plate.(Fig.20).
Fig.19 Removal of cylinder head bolts
Fig.20 Removal of cylinder head
5.
It is recommended that both the head gasket (between the cylinder head
and the valve plate) and the block gasket (between the valve plate and the
cylinder block) be replaced at any time the cylinder head is removed.
However, if no service is required to the valve plate, it may be left in
place. If the valve plate comes loose from the cylinder block, the block
gasket must be replaced.
6.
Carefully remove old head gasket from top of valve plate with gasket
scraper. Be careful not to disturb the valve plate to cylinder block joint if
valve plate is to be left in place. If valve plate comes loose from cylinder
block, proceed to section 5.2 Valve plate removal.
