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MAINTENANCE
4.7 Troubleshooting
4.7.1 Machine troubleshooting
SYMPTOM
POSSIBLE CAUSES
SOLUTION
Engine speed too low?
Set engine speed to correct RPM.
Clutch slips?
Check or replace clutch.
V-belt slips?
Adjust or replace V-belt.
Excessive oil in vibration?
Drain excess oil and fill to proper level.
Travel speed
too low, and
vibration is
weak.
Malfunction in vibrator
housing?
Check eccentric, gears and counter
weights.
Bearing Failure?
Replace Bearing
Insufficient engine output?
Check engine, compression etc.
4.7.2 Engine troubleshooting
SYMPTOM
POSSIBLE CAUSE
SOLUTION
Spark plug bridging?
Check gap, insulation or replace
spark plug.
Carbon deposit on spark
plug?
Clean or replace spark plug.
Short circuit due to deficient
Check spark plug insulation,
replace if worn.
Difficult to start, "fuel
is available, but no
SPARK at spark
plug".
Improper spark plug gap?
Set to proper gap.
ON/OFF switch is shorted?
Check switch wiring, replace
switch.
Ignition coil defective?
Replace ignition coil.
Improper spark gap, points
dirtry?
Set correct spark gap and clean
points.
Condenser insulation worn or
short circuiting?
Replace condenser.
Difficult to start, "fuel
is available, and
SPARK is present at
spark plug.
Spark plug wire broken or
short circuiting?
Replace defective spark plug
wiring
Wrong fuel type?
Flush fuel system, and replace
with correct type of fuel.
Water or dust in fuel system? Flush fuel system.
Difficult to start, "fuel
is available, spark is
present and
compression is
normal".
Air cleaner dirty?
Clean or replace air cleaner.
Summary of Contents for PC4012 Series
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