TM 5-4310-379-14
5-18. Exhaust Valve.
This task covers:
Replace
INITIAL SETUP
Tools
Materials/Parts
General Mechanic's Tool Kit (NSN 5180-00-177-7033)
Valve, Exhaust
Compressor, Valve Spring (PN J 7455)
Solvent, Dry Cleaning (Item 23, Appendix D)
Remover, Valve Guide (PN J 267)
Rags, Wiping (Item 21, Appendix D)
Installer, Valve Guide (PN J 9530)
Remover, Valve Seat Insert (PN J 4824-03)
Equipment Condition
Driver, Valve Seat Insert (PN J 1736)
Tester, Valve Spring (PN J 22738-02)
Cylinder head assembly removed (para. 5-19).
Cleaned, Valve Guide (PN J 5437)
Checking Gage, Valve Spring (PN J 25076-B)
Valve Seat Grinder (PN J 7040)
Spring Tester (PN J 9666)
Replace. (figure 5-19)
NOTE
There are four exhaust valves. Replacement of each one is the same.
(1)
Using spring compressor, compress the spring (1) and remove the two-piece valve lock (2).
(2)
Release spring compressor and remove the valve spring cap (3), spring (1), and spring seat (4).
(3)
Turn the cylinder head (5) over and remove valve (6).
(4)
Using valve guide tool, remove the valve guide (7) out from the bottom of the cylinder head (5).
(5)
Using valve seat insert tool, remove valve seat insert (8) from cylinder head (5).
WARNING
Dry cleaning solvent PD-680 used to clean parts is potentially dangerous to personnel and property. Avoid
repeated and prolonged skin contact. Do not use near open flame or excessive heat. Flash point of
solvent is 100-138°F (38-60°C).
(6)
Clean all items with dry cleaning solvent and dry thoroughly.
(7)
Check spring (1) using spring tester and replace when load of less than 25 lbs will compare it to a length of 2.20
in. (5.6 Nm).
(8)
Inspect spring (1) and replace if pitted or fractured coils.
(9)
Inspect spring seats (4) and cap (3) and replace if worn.
(10)
Inspect valve (6) and replace if valve face has ridges, cracks or is pitted.
5-60
