Tennant 235, Operator'S Manual

Page: 59 / 82

MAINTENANCE
3-23
235 MM166 (8--95)
VALVE TAPPET CLEARANCE
The valve tappet clearance should be checked
after every 400 hours of operation. The intake
valve clearance should be 0.003 to 0.006 in
(0.07 to 0.15 mm) cold.
The exhaust valve clearance for engines serial
numbers up to 1816500655 should be 0.016 to
0.019 in (0.40 to 0.50 mm) cold.
The exhaust valve clearance for engines serial
number 1816500656 to 1917809295 should be
0.011 to 0.014 in (0.25 to 0.35 mm) cold.
The exhaust valve clearance for engines serial
number 1917809296 and above should be 0.013
to 0.016 in (0.35 to 0.40 mm) cold.
Grind off the end of the valve stem to obtain the
proper clearance.
CRANKCASE VENTILATION SYSTEM
Clean the crankcase ventilation hoses, tubes, and
fittings after every 200 hours of operation.
TUNE-UP CHART
Idle speed 1000 rpm
Maximum governed
speed
2200 rpm
Spark plug gap,
gasoline
0.025 in (0.6 mm)
Spark plug gap, LPG 0.018 in (0.4 mm)
Valve clearances, cold
intake
0.003 to 0.006 in
(0.07 to 0.15 mm)
Valve clearances, cold
exhaust (for engines
0.016 to 0.019 in
(0.40 to 0.50 mm)
Valve clearances, cold
exhaust (for engines
serial number up to
0.016 to 0.019 in
(0.40 to 0.50 mm)
serial number up to
1816500655)
Valve clearances, cold
exhaust (for engines
serial number
1816500656 to
1917809295)
0.011 to 0.014 in
(0.25 to 0.35 mm)
Valve clearances, cold
exhaust (for engines
serial number
1917809296 and above)
0.013 to 0.016 in
(0.35 to 0.40 mm)