Owner’s manual
What is the common problem with an air compressor?
The most common problems we see on a Craftsman air compressor like model 919167242 are air leaks, the unit not building or holding tank pressure, and start or shut-off issues tied to the pressure switch, check valve, regulator, or fittings. Use the troubleshooting charts in the 919167242 owner's manual to match symptoms to causes.
- Air leaks at fittings or hoses: hissing sound, pressure drops while sitting
- Safety valve popping: tank pressure climbs too high, valve vents air
- Regulated pressure drops under use: tool runs weak, gauge drops when you pull the trigger
- Won’t build tank pressure: runs a long time, never reaches cut-out
- Won’t start or struggles to restart: hums, trips breaker, or won’t restart with pressure in the tank
- Shut off power and bleed pressure before touching fittings, hoses, or gauges.
- Listen for leaks around quick-connects, regulator, drain valve, and tank fittings.
- Check the hose for pinholes or cuts (a small hole causes big performance loss).
- Verify the regulator setting under flow (set pressure while the tool is running, not at idle).
- Watch the safety valve: if it vents near shut-off, the pressure switch cut-out may be too high or the switch may not be shutting off.
| Symptom | Most likely causes | What to do next |
|---|---|---|
| Safety valve pops | Pressure switch not shutting off; cut-out set too high | Turn unit off; inspect pressure switch operation |
| Leaks at fittings | Loose tube fittings; worn seals | Tighten fittings; recheck for leaks |
| Pressure drops when using tool | Some drop is normal; air demand too high; leaks; restricted check valve | Reduce air use; check for leaks; verify accessory SCFM needs |
| Tank won’t hold air | Leak at fittings; tank/weld leak | Check fittings first; if tank leak is suspected, stop using and have it serviced |
Air leaks and pressure-control problems make the compressor run longer and hotter, reduce SCFM at the tool, and can trigger safety valve venting. Fixing leaks and setting regulated pressure correctly restores performance and helps prevent premature wear.
Last updated: February 2026
Is Craftsman a good air compressor?
Yes. Craftsman air compressors, including model 919167242, are a solid choice for most homeowner and DIY jobs (inflating tires, running nailers, light blow-off). They deliver good value and practical performance when you follow the operating limits and maintenance steps in the 919167242 owner's manual.
For a tank-mounted, permanently lubricated compressor like the Craftsman 919167242, “good” usually comes down to whether it reliably builds tank pressure, cycles on and off correctly, and matches your tool’s air demand.
- Best for: intermittent air tools, garage tasks, small projects
- Not ideal for: continuous high-CFM tools (long sanding, blasting, nonstop spraying)
- Key reliability factor: correct duty cycle and clean, dry air practices
The manual notes this pump can run continuously, but we recommend staying within a 50% to 75% average duty cycle to extend life (about 30 to 45 minutes of run time per hour). That guideline is a strong indicator the compressor is designed for real work, but not for nonstop heavy production use.
| Task type | Typical fit for 919167242 | Why |
|---|---|---|
| Tire inflation, blow gun | Good | Short bursts, low air demand |
| Brad/finish nailing | Good | Intermittent cycling |
| Light spray painting | Often good | Depends on sprayer CFM and duty cycle |
| DA sanding, blasting | Usually not ideal | High continuous air demand |
If you size the compressor to the job, you avoid constant running, overheating, nuisance tripping, and premature wear. Staying within the recommended duty cycle is one of the simplest ways to get years of dependable operation.
- Match tool CFM at PSI to what your compressor can realistically supply.
- Drain tank moisture regularly to reduce internal corrosion and water in air lines.
- Use the right hose inside diameter (1/4 in., 3/8 in., or 1/2 in.) for your airflow needs.
- If it struggles to start or build pressure, troubleshoot early instead of forcing it.
Last updated: February 2026
Are air compressor parts interchangeable?
Most air compressor parts are not interchangeable. For the Craftsman 919167242 air compressor, internal components (pump parts, valve plate, cylinder head, gaskets, rings, connecting rod parts) must match the exact model design to fit correctly and maintain safe cut-in and cut-out pressure operation.
- Quick-connect couplers and plugs (same style and thread)
- Air hoses (correct inside diameter and pressure rating)
- Some regulators and gauges (matching ports and pressure range)
- Common NPT fittings (correct thread size and seal method)
- Pump rebuild parts (rings, cylinder sleeve, connecting rod components)
- Valve plate assemblies and head gasket kits
- Pressure switch and unloader valve combinations (setpoints and porting vary)
- Check valves (threading, flow direction, and tube connections vary)
Use the exploded views and parts list in the owner's manual to match by model number, part name, and part number. This avoids common fit issues like wrong thread pitch, misaligned tubes, or incorrect pressure control components.
- Match the exact model number: 919167242
- Confirm thread type and size (common sizes are similar, but not identical)
- Confirm pressure rating for any air outlet accessory
- Confirm port orientation (especially on check valves, regulators, and switches)
Incorrect substitutions can cause air leaks, poor pressure build, excessive cycling, or unsafe pressure behavior. The manual also warns against modifying the tank or substituting parts to alter factory-set operating pressures; use a regulator and gauge at the outlet when needed.
| Part type | Can it be “universal”? | What must match | Common risk if wrong |
|---|---|---|---|
| Coupler/plug | Sometimes | Style + thread size | Leaks, won’t connect |
| Hose | Sometimes | I.D. + pressure rating | Burst, pressure drop |
| Regulator/gauge | Sometimes | Port size + range | Bad readings, poor control |
| Pump internal parts | No | Exact model parts | Rapid wear, failure |
If you are swapping parts because of a symptom, these guides help you pinpoint the correct component first:
- Air compressor air leaks
- Air compressor won't build tank pressure
- How to replace an air compressor check valve
- How to replace an air compressor pressure switch
Last updated: February 2026
What company makes Craftsman air compressors?
Craftsman is the brand; different companies have built Craftsman air compressors over the years. For Craftsman model 919167242, the owner documentation identifies Sears, Roebuck and Co. as the warrantor/brand owner, and it does not name a separate OEM manufacturer. Use the model and the parts list in the 919167242 owner's manual to match the correct components.
The documentation for this specific compressor ties the product to Sears and the Craftsman brand, and it supports parts identification by model number.
- Model number shown in the manual: 919167242
- Product type: tank mounted air compressor
- Documentation includes: safety guidelines, operation, troubleshooting, and repair parts lists
- Manufacturer name: not listed as a separate OEM in the manual
When you need the factory that physically built the unit, the most reliable source is the data plate on the tank or frame (not the brand name on the shroud).
- Look for a line that says MFG, Manufactured for, Manufactured by, or a company name/address
- Record any code numbers or date codes near the model/serial
- Match the pump, pressure switch, regulator, and check valve style to the repair parts diagrams
- Use the full model number when searching parts to avoid cross-brand lookalikes
| Item on the label | What it means | Best use |
|---|---|---|
| Craftsman | Brand/marketing name | Identifies product line |
| 919167242 | Model identifier | Correct parts list and diagrams |
| Serial/date/code | Production trace | Helps narrow factory and revision |
Craftsman compressors can share similar tank sizes but use different pressure switches, gauges, and pump assemblies. Matching parts by model 919167242 prevents ordering the wrong component and speeds up troubleshooting.
Last updated: February 2026
