Craftsman CX Series Operator's Manual page 20

4. Check that the spark plug washer is in good condition and thread the spark
plug in by hand to prevent cross-threading.
5. After the spark plug is seated, tighten with a spark plug wrench to compress
the washer.
NOTE: When installing a new spark plug, tighten 1⁄2-turn after the spark plug seats
to compress the washer. When reinstalling a used spark plug, tighten 1⁄8- to 1⁄4-turn
after the spark plug seats to compress the washer.
The spark plug must be tightened securely. A loose spark plug can become
very hot and can damage the engine.
Carburetor Adjustment
The carburetor is not user adjustable. Contact Sears Parts & Repair for adjustment.
Lubrication
Drive and Shifting Mechanism
At least once a season or after every 25 hours of operation, remove rear cover.
Lubricate all chains, sprockets, gears, bearings, shafts, and the shifting mechanism.
Use engine oil or a spray lubricant. Refer to Figure 22.
NOTE: Before tipping the unit on the front housing, run the fuel tank empty so fuel
does not leak out of the fuel cap.
1. Carefully pivot the snow thrower up and forward so that it rests on the auger
housing.
2. Remove the frame cover from the underside of the snow thrower by
removing the self-tapping screws which secure it. Refer to Figure 27.
3. Apply a light coating of engine oil (or 3-in-1 oil) to the hex shaft. See Figure
22.
NOTE: Be careful not to get any oil on the aluminum drive plate or rubber
friction wheel. Doing so will hinder the snow thrower's drive system. Wipe
off any excess or spilled oil.
Rubber Friction
Wheel
Hex Shaft
Aluminum
Drive Plate
Wheel Axle Support
Bracket
SERVICE AND MAINTENANCE
CAUTION
Figure 22
4. At least once a season grease the wheel axle with Arctic grease, part number
737-0318. The grease fitting is located on the wheel axle tube behind the
wheel axle support bracket.
Wheels
At least once a season, remove both wheels. Clean and coat the axles with a
multipurpose automotive grease before reinstalling wheels.
Chute Directional Control
Once a season, lubricate the eye bolt bushing and the spiral with 3-in-1 oil.
Auger Shaft
At least once a season, one at a time, remove all of the shear pins from the auger
shaft. Spray lubricant inside the hub of each auger spiral assembly and around the
spacers on the auger shaft.
Grease fittings can also be found at each end of the auger shaft. Lubricate with a
grease gun once a season. See Figure 23.
Gear Case
The auger gear case is equipped with a grease fitting. Lubricate with grease once a
season (order part number 737-0168). See Figure 23.
NOTE: To relieve pressure, remove the vent plug before lubricating the gear case.
See Figure 23. Failure to do so could result in damage to the gear case seals.
Augers
Each of the auger spiral assemblies is secured to the spiral shaft with a shear pin and
cotter pin. If the auger should strike a foreign object or ice jam, the snow thrower is
designed so that the pins may shear.
1. If augers do not turn, check to see if pins have sheared.
2. Replace the pins if needed. Two replacement shear pins and cotter pins
have been provided with the snow thrower. Spray an oil lubricant into shaft
before inserting new pins and securing with new cotter pins. See Figure 23.
Shear Pins
Bow-Tie Pins
20
Vent Plug
Grease Fitting
Spacers
Figure 23