Tennant 235, Operator'S Manual

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MAINTENANCE
235 MM166 (8--95)
3-22
ELECTRICAL SYSTEM
SPARK PLUG
Clean or replace, and adjust spark plugs after
100 hours of operation. A wire gauge is best for
checking the spark plug gap. A flat gauge should
not be used unless the electrode surfaces have
been dressed with a small file to get parallel
surfaces between the center and side electrodes.
Set the spark plug gap by bending the side
electrode. All spark plugs, new or used, should
have the gaps checked and reset if necessary.
A
B
03559
GAPPING THE SPARK PLUG
A. Spark Plug
B. Gapping Tool
The proper spark plug gap is 0.025 in (0.6 mm)
for gasoline engines. The proper spark plug gap is
0.018 in (0.4 mm) for LPG engines.
IGNITION SYSTEM
The engine ignition system is the breakerless
type. The ignition system needs no regular
maintenance. The only adjustment is the ignition
air module gap which should be set at 0.008 to
0.012 in (0.2 to 0.3 mm).
STARTER
The starter motor brushes must be inspected after
every 400 hours of operation.
CYLINDER HEAD
CYLINDER HEAD
The cylinder head may develop carbon deposits.
After every 400 hours of operation, remove the
cylinder head and clean it of any accumulated
deposits. Replace the cylinder head, making sure
the cylinder head screws are lubricated with
graphite grease and are returned to the same
hole. Alternately snug the screws; tighten them to
one-half of the specified value, then torque the
screws to 15 to 20 ft lb (20 to 25 Nm).
3
7
5
8
1
2
6
4
9
03497
CYLINDER HEAD SCREW TIGHTENING
SEQUENCE