Toro Groundsmaster 328-D, Service Manual

Page: 54 / 402

External Engine Component Repair
In this section, repairs to the external engine compo- Crankcase Breather
nents will be outlined. These are repairs which can be Fan, Pulley, Bearing and Shaft Repair or Replacement
accomplished without removing the engine from the Oil Pressure Switch Replacement
mower frame. They are: Oil Pump
Stop Solenoid Replacement
Water Pump Replacement
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.
Figure 24
Crankcase breather system
External Engine Component Repair Page 4 - 26 Groundsmaster
®
300 Series