COMPRESSION
Stellite® Valves & Rotators
Fig. 21 - Counterboring for Valve Seat
Valves, Valve Conversions
The life of a valve is considered to be the period of time
the valve will operate before repair or replacement is
necessary. The life of a standard exhaust valve is often
shortened because of burning, which occurs when
pieces of combustion deposit lodge between the valve
seat and valve face, preventing the valve from closing
completely. This is most likely to occur on engines which
are operated at constant speed and constant load, for
long periods of time. Exhaust valve life can be extended
by using:
1.
A Rotocap (Valve Rotator), which turns the exhaust
valve a slight bit on each lift, wiping away any
deposits which tend to lodge between the valve face
and seat, or,
2.
A Stellite® Exhaust Valve which has a greater
resistance to heat.
Standard Valve and Rotocap
Stellite® Valve Only
Stellite® valve and Rotocap
Use Table 5 below, Table 6 on page 10 or Table 7 on
page 11 for Part Numbers.
TABLE NO. 5
STELLITE® VALVE AND ROTOCAP CONVERSION
ROTOCAP ONLY CONVERSION
STELLITE®
BASIC MODEL SERIES
VALVE
SPRING
ROTOCAP
RETAINER
PIN
ALUMINUM CYLINDER
60000*, 80000*, 82000*, 92000*, 94000*
260443
26826
292259
230127
230126
100000, 130000260860
26826
292259
230127
230126
140000, 170000, 190000, 200000, 250000
390420
26828
292260
93630
CAST IRON CYLINDER
14, 19, 190000, 200000
26735
26828
292260
68283
23, 230000
261207
26828
292260
68283
240000, 300000, 320000
261207
26828
292260
68283
(Stellite® Std.)
*To use Rotocap only #26973 standard valve must be used.
NOTE: Rotocap not used with LP Gas on 6, 8 and 10 cu. in. engine.
9
