SEARS CRAFTSMAN 919.174410 (01) PDF MANUAL

SEARS CRAFTSMAN 919.174410 (01) PDF SUMMARY:

What information should I record about my air compressor?

Record the model number, code number, and manufacturer’s number of the air compressor. The model number is on the label on the front of the air tank, and the code number is on the foil label on the rear of the air tank. The manufacturer’s number (for ASME Code outfits only) is on the metal data plate on the backside of the air tank. Also, record the motor manufacturer name and number. Retain these numbers for future references.

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What tools are needed for the air compressor assembly?

The tools needed are: a 9/16" socket or open-end wrench for attaching the wheels and hose adapter; an adjustable wrench for attaching the pressure regulator; a 7/15" open-end wrench for attaching the air pressure gauge; a 7/15" socket or open-end wrench for attaching the foot extension bracket (2 hp unit only); a 3/16" hex key for installing the plug in the regulator; and pipe thread sealant.

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How do I attach the wheels, handle, etc., for assembly?

1. Insert the handle into the pockets under the tank base and put one set screw through the hole in one side of the tank base, then tighten it down on the handle.
2. Remove the protective paper strip from the adhesive-backed rubber foot strip and attach it to the bottom of the foot extension bracket or tank leg, pressing firmly into place.
3. Attach the foot extension bracket to the air tank bracket using one cap screw, one lock washer, and one hex nut at each end, and then tighten. (Model 919.174320 only)
4. Attach one wheel to each side of the outfit using one shoulder bolt and one locking hex nut for each wheel, and then tighten securely. Use the bracket lower bolt hole for attaching the wheels on model 919.174320.

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How do I install the regulator?

Install the regulator on the end of the manifold using the short pipe nipple. The arrow must point away from the manifold in order for the regulator to function properly. Next, install the gauge, adapter, and plug in the regulator. The plug is supplied with the regulator. Use a small amount of pipe thread sealant on all pipe thread joints.

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What are the start-up procedures for the air compressor?

1. Place the unit on a level surface.
2. Remove the oil fill plug and slowly add a special compressor oil such as Sears 9-16426 or SAE 20-20W SF motor oil until it is level with the top of the fill hole. The oil level must not be lower than 1/4" from the top at any time. Under extreme winter-type conditions, use SAE 10W oil. Multi-viscosity oil (10W 30) may be used but will result in carbon deposits on critical components and reduce performance and compressor life. Replace the oil fill plug.
3. Plug the compressor into the correct power source.
4. Start the compressor by switching the ON-AUTO/OFF switch to the ON-AUTO position.
5. Open the regulator by turning the knob clockwise fully to permit air to escape and prevent air pressure buildup in the air tank.
6. Run the compressor for 30 minutes in this manner to lubricate pistons and bearings.
7. Shut off air with regulator (turn knob counterclockwise) and let the unit pump up to cut-off pressure.
8. Turn the switch to “OFF” and check the oil level; add oil if necessary.
9. Turn the switch to “ON” and the unit is ready for use.
10. Connect the air hose to the air adapter located at the end of the regulator.

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How does the manifold operate?

The manifold is located on the top of the unit between the motor and air compressor pump. On the manifold is the pressure switch, safety valve, regulator, and pressure gauge. The gauge shows the air tank pressure. The air pressure coming from the air tank is controlled by the regulator knob. Turn the knob clockwise to increase pressure and counterclockwise to decrease pressure. To avoid minor readjustment after making a change in pressure setting, always approach the desired pressure from a lower pressure. When reducing from a higher to a lower setting, first reduce to some pressure less than that desired, then bring up to the desired pressure. Depending on the airflow requirements of each particular accessory, the outlet regulated air pressure might have to be adjusted under flow conditions.

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How does the pressure switch operate?

The pressure switch starts the motor when the air tank pressure drops below the factory-set cut-in pressure and stops the motor when the air tank pressure reaches the factory-set cut-off pressure.

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What does the motor have?

The motor has a thermal overload protector. If the motor overheats for any reason, the overload protector will shut off the motor. The motor must be allowed to cool before restarting. Turn the ON-AUTO/OFF switch to the OFF position. To restart, turn the ON-AUTO/OFF switch to the ON position and depress the reset button located on the end of the motor.

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What should I check for if the overload protector shuts the motor off frequently?

Check for a possible voltage problem. Low voltage can also be suspected when: the motor does not get up to full power or speed, fuses blow out when starting motor, and lights dim and remain dim when the motor is started. Avoid using long extension cords because they can cause a power loss to the motor. Add extra air hose instead of extension cords. If an extension cord must be used, use a 3-wire extension cord with a minimum wire size of 12 gauge for cord lengths of 0-50 feet.

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What is the purpose of the pressure release valve?

The pressure release valve, located on the bottom of the pressure switch, is designed to unload air from the compressor head automatically at unit shut-off. This protects the motor from starting against air pressure remaining in the compressor head and tubing. When the motor stops running, air will be heard escaping from the valve for a few seconds. When the motor is running, no air should be leaking from the pressure release valve. Models 919.174212 & 919.174311 are designed to operate without this unloading feature.

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How do I replace the air intake filter?

A dirty air intake filter will not allow the compressor to operate at full capacity. When the intake filter becomes dirty, oily, or covered with paint overspray, replace it. Do not operate the compressor with the air intake filter removed. To replace the filter, use needle-nosed pliers and pull or pry the old filter out and replace it with a new one.

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How do I check the safety valve?

Occasionally, pull the ring on the safety valve to make sure that the valve operates freely. If the valve is stuck or does not operate smoothly, it must be replaced.

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How do I check and change the oil?

The oil level should be even with the top of the fill hole and must not be allowed to be lower than 1/4" from the top at any time. It is recommended that the oil in the base be changed after every 100 hours of operation. To drain the oil, remove the oil drain plug and collect the oil in a suitable container. Be sure to replace the plug securely before adding new oil. Use a special compressor oil, such as Sears 9-16426 or SAE 20-20W SF motor oil (crankcase oil capacity is 16 fluid ounces). Under extreme winter conditions, use 10 weight oil.

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Where should I locate the air compressor?

Locate the unit in a dry, clean, cool, and well-ventilated area. The compressor crankcase and head are designed with fins that allow for proper cooling. Clean or blow off fins and any other parts of the compressor that collect dust or dirt. A clean compressor runs cooler and provides longer service. Do not place rags, containers, or other material on or against the belt guard, which would obstruct ventilation openings necessary for proper compressor operating temperature. If humidity is high, a Sears air filter can be used to remove excessive moisture. Follow the instructions packaged with the air filter for proper installation.

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How often should I drain water from the air tank, and how do I do it?

Water should be drained from the air tank weekly, depending on where and how often the outfit has been used. If humidity is high, drain more often. To drain the water that has gathered in the air tank, open the drain cock valve and allow it to drain. When empty, close the valve tightly before operating the compressor. If the drain cock valve is clogged, release the air pressure in the air tank and then remove it, then clean and reinstall the valve.

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How do I replace the belt?

1. Unplug the unit from the power source before repairing.
2. Remove the screws from the back of the belt guard and remove the belt guard.
3. Loosen the wing nut and tilt the motor in.
4. Remove the belt and replace it with a new one. The belt should be centered over the grooves on the flywheel and motor pulley.
5. Push the motor back into a regular position and tighten the wing nut securely by hand. Proper tension is approximately ¼" belt deflection measured midway between the pulley and flywheel when a 3-pound weight or equivalent finger pressure is applied at this point. A loose belt will squeal at unit start-up.
6. Replace the belt guard and screws.

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What can I use with Sears compressors?

Spray Guns, Sandblasters, Paint Tanks, Blow Guns, Air Brushes, Air Tanks, Air Tools: sanders, drills, impact wrenches, hammers, Air Hose: ¼", 5/16" or 3/8" inside diameter, 15’, 25’, 50’ lengths, Inflator Kits, Quick Connector Sets: various sizes, Viscosimeter, Air Line Filters, Oil Fog Lubricators, Tire Air Chucks, Air Caulking Gun, Air Powered Washer Gun.

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What do I do if the motor will not run?

• If the motor overload protection switch has tripped, let the motor cool off and reset the switch by pressing the red reset button located on the end of the motor.
• If the tank pressure exceeds the pressure switch cut-in pressure, the motor will start automatically when the tank pressure drops below the cut-in pressure of the pressure switch.
• If the fuse is blown or the circuit breaker is tripped: Check the fuse box for a blown fuse and replace it as necessary or reset the circuit breaker. Do not use a fuse or circuit breaker with a higher rating than that specified for your particular branch circuit. Check for the proper fuse; only “Fusetron” Type T fuses are acceptable. Check for low voltage conditions and/or a proper extension cord. Remove the check valve and clean or replace it if it is stuck open or closed. Disconnect other electrical appliances from the circuit or operate the compressor on its own branch circuit.
• If the extension cord is wrong, check for the proper gauge wire and cord length. Refer to the extension cord recommendations under the Motor Section on page 8.
• If the pressure release valve on the pressure switch has not unloaded the head pressure, bleed the line by pushing the lever on the pressure switch to the OFF position, which opens the pressure release valve. If the valve still does not open, replace it.
• If the check valve is stuck, remove and clean or replace the check valve.
• Check for loose electrical connections in the motor connection box and pressure switch. The pressure switch cover can easily be removed by lifting the cover at the rear of the switch.
• If there’s an issue with the capacitor on the motor, return it to a Sears Service Center to check and replace it if necessary.
• If the motor is faulty, unless it is visibly damaged, remove it and have it checked at a local Sears Service Center.
• If there is excessive tank pressure because the pressure switch does not shut off the motor, move the pressure switch lever to the “off” position. If the outfit doesn’t shut off, replace the switch.
• If the pressure switch cut-out is too high, return the outfit to a Sears Service Center to check and adjust or replace it if necessary.

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What causes air leaks and how can I fix them?

• If the tube or hose fittings are loose, tighten the fittings with an audible leak and check the fittings under pressure with a soapy water solution.
• If the check valve is defective, remove and clean or replace the check valve.
• If there is a leak at the welds, the tank must be replaced.
• If there is an air leak in the safety valve, operate the safety valve manually by pulling on the ring. If the valve still leaks, it should be replaced.

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What causes a restricted air intake and how can I fix it?

If the air filter is dirty, clean or replace it with a new one.

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What causes a squealing sound and how can I fix it?

If the belts are too loose, tighten the wing nut on the motor mount.

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What causes low discharge pressure and how can I fix it?

• If there is no oil in the compressor, add oil to the top of the fill hole in the base.
• If there is prolonged excessive use of air, decrease the amount of air usage because the compressor is not large enough for the air requirement.
• If the air intake filter is restricted, clean or replace the air intake filter.
• If the belt is too loose, tighten the wing nut on the motor mount.
• If there is a hole in the hose, check and replace it if required.
• If the pulley is loose, tighten the pulley set screw.

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What causes knocking and how can I fix it?

• If the oil level is low, check the oil level and maintain it at the prescribed level.
• If the flywheel is loose, make sure the flywheel is tight by tightening the screw.
• If the compressor bolts are loose, check all bolts and tighten as required.

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What causes excessive belt wear and how can I fix it?

• If the belt is loose, adjust the wing nut on the motor mount.
• If there is carbon build-up, remove the head and valve plate and clean the top of the piston and bottom of the valve plate. Reassemble using a new gasket and torque screws to 25-30 Ft-Lbs.
• If the belt is too loose or too tight, adjust the tension using the wing nut on the motor mount.
• If there is a pulley wobble, check for a worn keyway or pulley bore resulting from running the compressor with loose pulleys. Also, check for a bent motor shaft.

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How do I order repair parts?

Contact any Sears Service Center and most Sears, Roebuck and Co. stores. Provide all pertinent facts when you call or visit. When ordering repair parts, give the part number, model number, part description, and name of item. If service or repair parts are required for the motor, supply all motor nameplate information, including manufacturers. All parts listed may be ordered from any Sears Service Center and most Sears stores. If the parts needed are not stocked locally, the order will be electronically transmitted to a Sears Repair Parts Distribution Center for handling.