Troy-Bilt GTX 20 - Manual (Page 22)

Maintenance (continued)
WARNING
BEFORE PERFORMING ANY
MAINTENANCE OR ADJUSTMENTS TO
TRACTOR, ENGINE OR ATTACHMENTS:
DISENGAGE ATTACHMENT/PTO DRIVE,
SHUT OFF ENGINE AND WAIT FOR ALL
MOVING PARTS TO STOP. SET PARKING
BRAKE AND ALLOW ENGINE AND
MUFFLER TO COOL.
Spark Plugs
Every 100 hours, remove plugs and check
condition. Reset gap (Fig. 7-5) at .025"
(0.65 mm). Do not service a piug in poor
condition. Best results are obtained with a
new plug.
Under good operating conditions, the plug
will have a light gray coating or a tan
deposit. A dead white, blistered coating
could indicate overheating. A black
(carbon) coating could indicate an over­
rich fuel mixture caused by clogged air
cleaner or improper carburetor
adjustment.
NOTE: Do not clean spark plugs in
machines which use abrasive grit. Clean
sparkplugs by scraping, wire brushing
or washing with commercial solvent.
Proper Jack Placement
A floor jack (not a bottle jack) or an
overhead hoist may be used to lift
front of tractor. Do not attempt to
use any other device to lift tractor.
Securely chock rear wheels. Rest
jack on PTO guard corners. See
below. Do not rest jack on PTO
sheave.
Rest jack on PTO
guard corners. / \zjy
Do not rest jack
on PTO sheave.
A WARNING
USE EXTREME CARE WHEN JACKING OR
HOISTING TRACTOR. BLOCK WHEELS
AND USE JACKSTANDS TO SECURELY
HOLD UNIT IN PLACE.
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