Valve Inspection Repair And; Crankcase Inspection And Repair; Crankcase Inspection - Toro AC-1 Service Manual

CYLINDER HEAD INSPECTION
& REPAIR (cont.)
Valve Assembly Inspection and Repair
I . Inspect the valve springs and related hardware for
excessive wear or distortion.
2. Check the valves and valve seat area for evidence
of deep pitting, cracks, or distortion. Check the
clearance of the valve stems in the guides.
NOTE: Difficult starting or loss of power accompanied
by high fuel consumption may be symptoms of faulty
valves. Although these symptoms could also be attrib-
uted to worn rings, remove and check the valves first.
3.
Check the valve guides for excessive wear.
If a valve guide is worn beyond specifications, it
will not guide the valve in a straight line. This
may result in burnt valve faces or seats, loss of
compression and excessive oil consumption.
Replace cylinder head, if necessary.
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CRANKCASE INSPECTION
& REPAIR
Crankcase Inspection
1.
Inspect the crankcase for nicks, cracks, and
deformation. Replace, if necessary.
2. Inspect the crankshaft for nicks, cracks,
roundness and deformation. Replace, if
necessary.
4-20
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