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 safekeeping until cylinder head from which it was
the valve face for burn or crack. Replace a defective
valve. Inspect and clean parts as follows:
removed is reinstalled.
f. Cylinder Compression Relief Value. Minimal
(a)
Inspect the cage for warp or pits.
maintenance required on this valve.
Check for
Replace a defective cage.
moisture, wipe dry, and coat with a film of lubricating oil.
(b)
Clean the spring (24) in fuel oil and wipe
(1) Disassemble by removing four nuts (8, fig.
dry. Inspect for break or weakness. Replace a
defective spring.
nut (7), lift piston (6), rings (5) and spring (4) out of cage
NOTE
(3). Remove gasket (10) from cylinder head, and valve
Use new gaskets at reassembly of valve.
(9) from the cage.
Assemble the air starting check valve in
(3)
reverse order of disassembly. Place valve in a rack for
1.
Cover
6. Piston
2.
Gasket
7. Nut
3.
Cage
8. Nut
4.
Spring
9. Valve
5.
Ring
10. Gasket
Figure 3-4. Cylinder compression relief valve.
(a) Inspect all parts for moisture or corrosion,
g. Cylinder Head Installation. Installation of the
then wash all parts in clean fuel oil and wipe dry with a lint
cylinder head(s) is accomplished by reversing the procedures
free cloth.
used in steps (1) through (12) of b. above, and applying
torque to holddown nuts as they are tightened in the order
shown on figure 3-5.
Replace defective spring or gaskets.
(c) Cover all parts with a light coat of oil before
reassembly.
(2) Assemble the cylinder compression relief
valve in reverse order of disassembly, (1) above.
3-24
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