Thermo Valve - Toro Workman 3000 Series Service Manual

Thermo Valve

1. Disconnect vacuum hose from thermo valve and con­
nect a hand vacuum pump to thermo valve.
2. Apply a vacuum and check for passage of air through
thermo valve.
Engine coolant temperature
40�C (104�F) or less
80�C (176�F) or more
IMPORTANT: Do use a wrench on plastic part when
removing or installing thermo valve. When instal­
ling, apply a dry sealant (Hermseal H1–M) to
threads.
Workman 3000/4000 Series
Normal condition
Vacuum leaks
Vacuum is maintained
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Figure 58
Liquid Cooled Gas Engine