Craftsman 919.16778 User Manual

Craftsman 919.16778

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Operators Manual

CAUTION: Read the Safety Guidelines

and All Instructions Carefully Before

Operating.

Sears, Roebuck and Co., Hoffman Estates, IL 60170 U.S.A.

Visit our Craftsman website: www.sears.com/craftsman

Permanently Lubricated

2-Stage

Twin V

Portable

AIR COMPRESSOR

• Safety Guidelines

• Assembly

• Operation

• Maintenance

• Service and Adjustments

• Troubleshooting

• Español

D22130 Rev. 1 11/8/01

Model No.

919.167780

Table of Contents

Questions and Answers:

D
Dr. Carly MartinezAug 18, 2025
Why is my Craftsman 919.16778 not supplying enough air?
- C
  Charles HoweAug 18, 2025
  If your Craftsman Air Compressor isn't providing enough air, it could be due to several reasons. First, try decreasing the amount of air you're using. Ensure the accessory's air requirement isn't higher than what your compressor supplies; if it is, you might need a larger compressor. Inspect the hose for holes and replace it if necessary. Remove and clean the check valve or replace it if it's restricted. Tighten any loose fittings to prevent air leaks, and clean or replace the air intake filter. Remember, don't operate the compressor without the filter.
M
melissacaseyAug 23, 2025
What to do if the pressure drops when using my Craftsman 919.16778 Air Compressor?
- O
  Oscar Wolf IIAug 23, 2025
  It's normal for some pressure drop to occur on the regulated pressure gauge of your Craftsman Air Compressor when an accessory is used. However, if the pressure drop is excessive, adjust the regulator following the instructions in the “Description of Operation” paragraph in the “Operation Section. Remember to adjust the regulated pressure under flow conditions, meaning while the accessory is in use.
J
John AndersonAug 26, 2025
What to do if my Craftsman Air Compressor regulator will not shut off air?
- K
  kimberly37Aug 26, 2025
  If the regulator on your Craftsman Air Compressor won't shut off the air outlet, it means the regulator is damaged and needs to be replaced.
B
Brian SalazarAug 28, 2025
Why does the safety valve keep popping off on my Craftsman 919.16778 Air Compressor?
- K
  Kimberly NewmanAug 28, 2025
  If your Craftsman Air Compressor's safety valve is popping off due to excessive tank pressure, immediately move the On/Auto/Off lever to the 'OFF' position. If the compressor does not shut off, contact a Trained Service Technician, as there may be an issue with the pressure switch or its cut-out setting.
W
William OwenAug 31, 2025
How to fix a knocking noise in my Craftsman 919.16778 Air Compressor?
- J
  Jon JohnsonAug 31, 2025
  If your Craftsman Air Compressor is making a knocking noise, it could be due to a defect in the safety valve or a defective check valve. Try manually operating the safety valve by pulling on the ring; if it still leaks, replace it. Also, remove and clean the check valve, or replace it if necessary.
D
Dustin FoleySep 2, 2025
How to fix air leaks at the fittings of my Craftsman 919.16778?
- A
  alexanderbranchSep 2, 2025
  If you notice air leaks at the fittings of your Craftsman Air Compressor, it's likely that the tube fittings aren't tight enough. Tighten the fittings where you hear air escaping, and check them with a soapy water solution to identify leaks. Be careful not to overtighten the fittings.
D
Daniel OrrSep 4, 2025
What to do if my Craftsman 919.16778 Air Compressor has air leaks in the tank?
- S
  Stacy GutierrezSep 5, 2025
  If your Craftsman Air Compressor has air leaks in the air tank or at the air tank welds, the air tank is defective and must be replaced. Do not attempt to repair the leak, drill into, weld, or modify the air tank, as this will weaken it and could cause it to rupture or explode.
E
Eric WalkerSep 7, 2025
How to fix air leaks in the check valve of my Craftsman Air Compressor?
- D
  David RogersSep 7, 2025
  If there are air leaks at or inside the check valve of your Craftsman Air Compressor, the check valve seat may be damaged. Replace the check valve. Refer the “To Replace or Clean Check Valve” in the "Service and Adjustment" section.
W
William BrownSep 9, 2025
Why is there a continuous air leak from my Craftsman Air Compressor regulator knob?
- J
  Julie ThomasSep 9, 2025
  If the regulator knob on your Craftsman Air Compressor has a continuous air leak, the regulator is likely damaged and needs to be replaced.

Craftsman 919.16778 Specifications

General

Model Number	919.16778
Max Pressure	125 PSI
Power Source	Electric
Voltage	120 V
Horsepower	1.5 HP (Peak)
Tank Capacity	6 Gallons

Summary

Safety Guidelines

Definitions and General Instructions

Defines safety symbols and provides general instructions for safe operation.

Risk of Explosion or Fire

Details hazards related to explosion or fire and how to prevent them.

Risk of Bursting and Flying Objects

Covers hazards from tank bursting and compressed air streams.

Risk of Electrical Shock and Breathing

Addresses dangers of electric shock and hazards of breathing contaminated air.

Risks of Burns, Moving Parts, Falling, and Transport

Covers hazards from hot parts, moving components, falling, and transport damage.

Installation

Grounding Instructions

Essential steps for safely grounding the air compressor to prevent electric shock.

Operation

Know Your Air Compressor Controls

Break-in Procedure

How to Start the Compressor

Service and Adjustments

To Replace or Clean Check Valve

To Replace Regulator

Troubleshooting

Excessive Tank Pressure Issues

Addresses problems with safety valve popping off due to pressure.

Air Leaks

Troubleshooting guide for air leaks at fittings, check valve, or tank.

Compressor Performance Issues

Regulator and Motor Malfunctions

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