TM 5-1940-322-24
0160 00
VALVES AND VALVE SPRINGS MAINTENANCE (Contd)
8.
Measure valve rim (1) for thickness. Refer to Table 2. Valve Rim Thickness Limits for specifications.
Table 2. Valve Rim Thickness Limits.
in.
mm
0.031
MIN
0.79
9.
Inspect valve stem tip (3) for flatness. If required, resurface valve stem tip (3) or replace valve (2).
10.
Measure valve spring (4) length. Refer to Table 3. Valve Spring Length Limits for specifications.
Replace valve spring (4) if specifications are not met.
Table 3. Valve Spring Length Limits.
in.
mm
Approximate Free Length
2.362
60.00
Maximum Inclination
0.039
1.00
INSTALLATION
NOTE
A load of 80.789.2 lb (359397 N) is required to compress the
spring to a height of 1.94 in. (49.25 mm).
1.
Using a press, compress valve springs (4) to a height of 1.94 in. (49.25 mm).
NOTE
The intake and exhaust seals are the same.
2.
Install valve stem seals (6) on cylinder block (5).
3.
Lubricate valves (7) with oil prior to installation.
4.
Install valves (7) in original location as noted at removal.
5.
Install valve spring (8) and retainer (9) on valve (7).
6.
Using valve spring compressor, compress valve spring and retainer assembly (10) on valve (7).
7.
Install collets (11) on valve (7) and release tension on valve spring compressor.
WARNING
Wear eye protection. If the collets are not correctly installed, they
can fly out when the stems are hit with a plastic hammer.
8.
After assembly, strike valves (7) with a plastic hammer ensuring collets (11) are seated.
9.
Repeat steps 1 through 8 for remaining valves and valve springs.
10.
Install cylinder head (WP 0101 00).
0160 00-4
