Owner’s Manual & Safety Instructions Save This Manual Keep this manual for the safety warnings and precautions, assembly, operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and the receipt in a safe and dry place for future reference. reV 15a 21 GAL cast iron vertical air compressor Visit our website at: http://www.harborfreight.
Table of Contents Safety Safety.......................................................... 2 Maintenance............................................... 14 Setup........................................................... 6 Parts List and Diagram............................... 18 Specifications.............................................. 6 Warranty..................................................... 20 Operation....................................................
IMPORTANT SAFETY INFORMATION WARNING Read all safety warnings and instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury. Save all warnings and instructions for future reference. The warnings, precautions, and instructions discussed in this instruction manual cannot cover all possible conditions and situations that may occur.
Air Compressor Safety Warnings Safety 1. Risk of fire or explosion - do not spray flammable liquid in a confined area or towards a hot surface. Spray area must be well‑ventilated. Do not smoke while spraying or spray where spark or flame is present. Arcing parts - keep compressor at least 20 feet away from explosive vapors, such as when spraying with a spray gun. 2. Risk of bursting - do not adjust regulator higher than marked maximum pressure of attachment. 3.
TO PREVENT ELECTRIC SHOCK AND DEATH FROM INCORRECT GROUNDING WIRE CONNECTION: Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded. Do not modify the power cord plug provided with the compressor. Never remove the grounding prong from the plug. Do not use the compressor if the power cord or plug is damaged. If damaged, have it repaired by a service facility before use.
Specifications Safety Electrical Rating 120VAC / 60Hz / 14A (Dedicated circuit recommended) Air Outlet Size 1/ ″ 4 Air Pressure Shut-off Restart -18 NPT 125 PSI 95 PSI Air Tank Capacity 21 Gallons Air Flow Capacity 4.7 CFM @ 90 PSI 5.8 CFM @ 40 PSI Oil Capacity 5.6 oz.
Assembly Hex Nut (65) Foot Pad (67) Washer (68) Figure D Safety Nut (24) Cylinder Head (7) Wheel (63) Sleeve (64a) Washer (64b) Bolt (64) Screw (69) 1. Attach the Wheels (63) to the Tank (70), using the Bolts (64), Washers (64b), Sleeves (64a), and Hex Nuts (65). Attach the Foot Pads (67) to the bottom of the Tank (70) using the Screws (69) and Washers (68). Air Filter (6) Figure F 3. Thread the Air Filter (6) onto the side of the Cylinder Head (7). 4.
For technical questions, please call 1-888-866-5797.
ITEM 61454 For technical questions, please call 1-888-866-5797.
Checking the Oil 1. Check the oil level before operation. Fill the Pump Crankcase (39) with SAE 30W, non‑detergent, Air Compressor Oil (sold separately). Safety IMPORTANT: Running the Air Compressor with the incorrect amount of oil will cause damage to the equipment and void the warranty. To prevent damage, do not use with overfilled or low oil. Slowly fill to full line, wait 2 minutes and fill back up to full line. Compressor has small passages that will fill slowly.
Operating Instructions Compressor Area Set Up 1. Designate a work area that is clean and well‑lit. The work area must not allow access by children or pets to prevent injury. Maintenance Operation Setup 2. Locate the Compressor on a flat level surface to ensure proper pump lubrication and to prevent damage to the unit. Keep at least 12″ of space around the unit to allow air circulation. 3.
General Operation 1. IMPORTANT: First, turn the Power Switch OFF. This releases tank pressure and allows the motor to start freely, without tripping the Circuit Breaker. Safety 2. Close the Drain Valve by turning it clockwise. 3. Check for oil leaks and check the oil level (See Checking the Oil). 4. Close the in-line Shutoff Valve between the compressor and the air hose. 5. Plug the Air Compressor Power Cord into a grounded 120 VAC electrical outlet. 6. Turn the Power Switch ON. 7.
Emergency Depressurization If it is necessary to quickly depressurize the Compressor, turn the Power Switch OFF. Then, pull on the ring on the Safety Valve to quickly release stored air pressure. Safety Automatic Shut off System 1. If the Compressor automatically shuts off before reaching its normal cutoff pressure: a. Shut off all tools. b. Wait until the Compressor cools down (about 10 minutes); c. If the unit does not start up again on its own, press the Reset Button to start the compressor; d.
Maintenance and Servicing Procedures not specifically explained in this manual must be performed only by a qualified technician. Safety TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION: Turn the Power Switch “OFF” and unplug the Compressor from its electrical outlet before performing any inspection, maintenance, or cleaning procedures. TO PREVENT SERIOUS INJURY FROM COMPRESSOR FAILURE: Do not use damaged equipment. If abnormal noise or vibration occurs, have the problem corrected before further use.
Oil Maintenance CAUTION! TO PREVENT INJURY FROM BURNS: Allow Air Compressor to cool before changing the oil. 1. Place a container under the Drain Plug. 2. Remove the Oil Breather Plug to allow air flow into the Pump. 3. Remove the Drain Plug, allowing the oil to drain into the container. 4. When the oil is completely drained from the Pump, replace the Drain Plug. 5. Fill the Pump with new SAE 30W, non‑detergent, Air Compressor Oil to the FULL level on the Oil Sight Glass (5.6 oz.).
Troubleshooting Problem Compressor does not start or restart Possible Causes Likely Solutions Safety 1. Tank(s) already pressurized. 1. No problem. Compressor will start when needed. 2. Power cord not plugged in properly. 2. Check that cord is plugged in securely. 3. Incorrect power supply. 3. Check that circuit matches compressor requirements. 4. No power at outlet. 4. Reset circuit breaker, or have outlet serviced by a qualified technician. 5. Thermal overload switch tripped. 5.
Troubleshooting (cont.) Likely Solutions 1. Check inlet and outlet filters. Clean and/or replace as needed. 2. Crankcase oil too thin or incorrect type. 2. Drain oil and refill to proper level with recommended oil. 3. Crankcase oil level too low. 3. Add oil to proper level, check for leaks. 4. Unusually dusty environment. 4. Clean and/or replace filters more often or move unit to cleaner environment. 5. Extension cord used. 5. Eliminate extension cord. 6. Unit not on level surface. 6.
Parts List and Diagram Parts List Safety Part Setup Operation 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 26a 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 Description Cover Elbow Start Valve Spring Washer M6 Screw M6 x 50 Air Filter Cylinder Head Head Gasket Valve Plate Metal Gasket Valve Valve Plate Gasket Cylinder Bolt M8 x 30 Spring Washer M8 Cylinder Gasket Pin Ø 13 x 44 Compression Ring Oil Ring Wrist Pin Retainer Piston Connecting Rod Screw M6 x 20 Hex Nut M6 Crank Shaft
Operation Setup Safety Assembly Diagram b Maintenance a a b ITEM 61454 For technical questions, please call 1-888-866-5797.
Limited 90 Day Warranty Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that this product is free from defects in materials and workmanship for the period of 90 days from the date of purchase.
