Cub Cadet MTD 70 Series - Manual (Page 54)

61, 65 and 70 Series Vertical Shaft Engines
48
Testing the roll over valve
The roll over valve vent has two functions. The first function is to vent the tank and the second function is to close off
the vent if the tank is inverted.
Test the roll over valve by:
1. Remove the roll over valve by following the steps
described above.
2. Connect a vacuum pump to the roll over valve.
3. Hold the roll over valve in an inverted position.
4. Apply a vacuum to the roll over valve. See Figure
4.24.
NOTE: The roll over valve should hold 15 in.Hg. for
15 seconds.
5. With the vacuum still applied, turn the roll over valve
over. See Figure 4.25.
NOTE: The vacuum should be relieved.
6. If the results do not match what is listed above,
replace the roll over valve.
Figure 4.24
15 in.Hg.
Figure 4.25
Zero reading