TM 5-3805-261-34
ENGINE MAINTENANCE.
3-13.
Valves. (Sheet 6 of 8)
ASSEMBLY
CAUTION
When installing new inserts, never
expand the diameter of the
extractor tooling when installing
the insert.
1.
Lower four exhaust inserts (6) and intake
inserts (7, Figure 3-66) on cylinder head.
Temperature should be approximately minus
54 degrees F.
2.
Grind and install, if removed, using extractor
tool for four intake inserts (7) and extractor
tool for four exhaust inserts (6), along with
handle assembly to drive insert in until seated
on counterbore of cylinder head.
3.
Measure valve recess. Valve must always be
below combustion surface with no protrusion.
NOTE
Eight guides need to contract enough
to allow easy fit into cylinder.
NOTE
Use dry ice to lower temperature of
guides.
4.
Lower temperature of eight guides (5).
5.
Install eight new guides (5, Figure 3-68), if
removed. Using suitable driver and press,
install eight new guides (5) so they extend
above top of cylinder head to proper
dimension. Minimum diameter of bore of eight
new guides (5) after installation is 0.3723 inch.
Remove all burrs and clean eight new guides
(5)after installation.
Figure 3-68.
Go to Sheet 7
3-83
