Tennant 365, Operator'S Manual, Page: 72 / 102

MAINTENANCE
365 MM173 (3---90)
3-30
VALVE TAPPET CLEARANCE
The valve tappet clearance must be checked and
adjusted if necessary after every 400 hours of
operation.
To set the valve clearance, rotate the crankshaft until
No. 1 cylinder is at the top of the compression
stroke. Check the timing marks. It should read 0 or
TDC. Both valves on No. 1 cylinder are now closed.
Set the valve clearance on both valves. Next, rotate
the crankshaft 180
_
, and set the valve lash on both
valves on No. 2 cylinder. Again rotate the crankshaft
180
_
, and set the valve lash on both valves on No. 4
cylinder. Rotate the crankshaft another 180
_
, and set
the valve lash on both valves on No. 3 cylinder.
Check and adjust, for machines below serial number
007000, the intake valve clearance from 0.008 to
0.010 in (0.20 to 0.25 mm) and the exhaust valve
clearance from 0.018 to 0.020 in (0.45 to 0.50 mm)
while the engine is cold.
Check and adjust, for machines serial number
007000 and above, the intake valve clearance from
0.009 in (0.22 mm) and the exhaust valve clearance
from 0.013 in (0.32 mm) while the engine is cold.
CRANKCASE VENTILATION SYSTEM
Clean the crankcase ventilation hoses, tubes, and
fittings and replace the PCV valve after every
400 hours of operation.
TUNE-UP CHART
Idle speed 950 + 50 rpm
Maximum governed speed,
under load 2350 + 50 rpm
Maximum governed speed,
no load 2700 + 100 rpm
Spark plug gap (For 0.032 in (0.8 mm)
machines below serial
number 007000)
Spark plug gap (For
0.039 in (1 mm)
machines serial number
007000 and above)
Ignition point gap (For
0.025 in (0.6 mm)
machines below serial
number 007000)
Dwell angle (For machines
48
_
to 52
_
below serial number
007000)
Timing (For machines
10
_
to 12
_
BTDC
below serial number @ 600 rpm,
007000) gasoline
12
_
to 14
_
BTDC
@ 600 rpm, LPG
Firing order 1---2---4---3,
counter---
clockwise rotation
Valve clearances, cold
0.008 to 0.010 in
(For machines below (0.20 to 0.25 mm)
serial number 007000) intake
0.018 to 0.020 in
(0.45 to 0.50 mm)
exhaust
Valve clearances, cold 0.009 in
(For machines serial (0.22 mm)
number 007000 and above) intake
0.013 in
(0.32 mm)
exhaust