Sears 917.25446 - Manual (Page 20)

REPAIR & ADJUSTMENTS
A
LEAD-ACID BATTERIES GENERATE
EXPLOSIVE GASES. KEEP SPARKS,
FLAME
AND SMOKING MATERIALS
AWAY FROM BATTERIES. ALWAYS
WEAR EYE PROTECTION WHEN
AROUND BATTERIES.
IDLE FUEL
CASING
STOP
1, Starling your Tractor With a Weak Battery
If your battery is too weak to start the engine, it should be
recharged. If "jumper cables" are used for emergency
starting, follow this procedure:
NOTE: YOUR TRACTOR iS EQUIPPED WITH A 1 2 VOLT
NEGATIVE GROUNDED SYSTEM, THE OTHER VEHICLE
MUST ALSO BE A 12 VOLT NEGATIVE GROUNDED
SYSTEM
a . Connect each end of the RED jumper cable to the
POSmVE(+) terminals of each battery (taking care
not to short against chassis) . (Fig. 28)
b Connect one end of the BLACK jumper cable to the
NEGATIVE (-) terminal of fully charged battery.
c Connect the other end of the BL A CK jumper cable
to the L.H. side panel boll (Fig. 14) NOTE: KEEP
AWAY FROM GAS TANK AND BATTERY
d Disconnect cablesrin reverse order:
1 L..H. side panel bolt (Fig. 14)
2 Negative terminal of fully charged battery
3 Positive terminals
DO NOT USE YOUR TRACTOR BAT­
TERY TO START OTHER VEHICLES
2 Throttle Control Cable Adjustment
Never attempt to change maximum engine speed
This is preset at the factory (3600 rpm± 75 rpm) and
should only be changed by a qualified service techni­
cian who has the necessary equipment
a. Remove hood (Fig. 32).
b. Loosen casing clamp screw (Fig. 30) until throttle
cable is free to move.
Move throttle control (on dashboard) to "FAST"
position.
Pull throttle cable tight (until speed control lever
(Fig. 30A) is against stop screw (Fig.. 30A). Re-
tignten casing clamp screw.
c.
d
A
REFER TO
PAGE 12
-STARTING THE ENGINE
a.
20
3 Carburetor Adjustment
In general, turning the adjusting needles (Fig. 29) in (clock­
wise) decreases the supply of fuel to the carburetor. This
gives a leaner fuel/air mixture. Turning the adjusting
needles (Fig. 29) out (counterclockwise) increases the
supply of fuel to the carburetor. This gives a richer fuel/air
mixture. Setting the needles midway between the lean and
rich positions will usually give the best results.
Adjust the carburetor as follows:
With the engine stopped, turn the idle fuel adjust­
ing needle in (clockwise) until it bottoms lightly.
NOTE: The tip of the idle fuel and main fuel
adjusting needles are tapered to critical dimen­
sions. Damage to the needles and the seats in
carburetor body will result if the needles are forced.
” " ...... ' ¡sting needles
Jttomed.. Turn
d
Start the engine and run at half throttle for five to ten
minutes to warm up. The engine must be warm
before making final settings (Steps d, e, f, andg).
Place the throttle into the 'fast" position.