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TM 5-4320-304-14
TM 08922A-14/1
5-10. lNSPECT/REPLACE CYLINDER HEAD AND VALVE ASSEMBLY (Continued)
Do not scratch the cylinder head seal-
ing face. Scratches could cause poor
sealing of cylinder head and cylinder.
11 Insert valve (6) into cylinder head (7).
12 Install cap (5), washer (4), valve spring (3), and
cup (1).
13 Press down on cup (1) and install collets (2).
lNSTALLATION/ADJUSTMENT:
Too small a clearance will damage
piston, cylinder head, and valves.
Too large a clearance will result
in difficult starting.
1
Adjust cylinder head clearance.
a.
b.
c.
d.
e.
f.
g.
h.
Insert dial gage 612 087 00 into measure
device 603 114 00.
Put dial gage 612 087 00 with measuring
device 603 114 00 on a flat surface.
Pre-tension dial gage 612 087 00 (1) to
1 mm and lightly tighten in position.
Set the dial gage to zero.
Install retaining bracket 612 752 00 (3)
to retain cylinder (4).
Bring the piston to TDC position.
Carefully lower dial gage 612 087 00
(1) with measuring device 603 114 00
(2) on cylinder (4).
Measure the distance between the top of
the cylinder and the top of the piston.
Record reading on dial gage (1).
5-29
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