External Engine Component Repair; Crankcase Breather System - Toro Groundsmaster 300 Series Service Manual

External Engine Component Repair

In this section, repairs to the external engine compo-
nents will be outlined. These are repairs which can be
accomplished without removing the engine from the
mower frame. They are:
Crankcase Breather System (Fig. 24)
The crankcase breather system is shown in the illustra-
tion. Blow-by fumes are recirculated for recombustion
without being discharged into the atmosphere. The
fumes within the cylinder block flow into the rocker cover
through holes in the valve tappets and the push rod
clearance holes. They are carried through a rubber air
breather pipe from the rocker cover to the inlet pipe, and
then to the combustion chamber. The air breather pipe
(rubber hose) should be replaced if it is damaged or
shows any sign of deterioration.
Failure to periodically inspect this hose, or to replace a
faulty hose, will allow dirt to enter directly into the engine
cylinder, and can cause premature engine wear or
damage.
External Engine Component Repair
Crankcase Breather
Fan, Pulley, Bearing and Shaft Repair or Replacement
Oil Pressure Switch Replacement
Oil Pump
Stop Solenoid Replacement
Water Pump Replacement

Crankcase breather system

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Figure 24
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Groundsmaster 300 Series