No. This connecting rod assembly is designed for specific compatible Rolair compressor pump models. Always verify your compressor model number and pump configuration before ordering replacement parts.

Why is my compressor still making noise after replacing the Rolair connecting rod assembly?

Continued noise may indicate additional internal wear involving the crankshaft, piston, wrist pin, or bearings. Inspect the full pump assembly carefully during compressor rebuilds to identify related damaged components.

Can I replace the Rolair connecting rod assembly myself?

Experienced DIY users can usually complete the repair with common hand tools and proper mechanical precautions. Disconnect power, drain compressor oil, and carefully document component orientation during disassembly.

What does the Rolair 31104840CH1 connecting rod assembly do?

The connecting rod assembly links the crankshaft to the piston inside the compressor pump. It converts rotational movement into piston motion, allowing the air compressor to generate compressed air efficiently.

Troubleshooting

The Rolair 31104840CH1 Connecting Rod Assembly is an OEM compressor pump component that connects the piston to the crankshaft, converting rotational motion into piston movement during compression cycles. This connecting rod assembly is used in select Rolair K-series compressor pumps and is critical for proper compressor operation.

Common Symptoms:

Loud knocking noise from compressor pump.
Excessive vibration during operation.
Compressor losing compression efficiency.
Premature connecting rod wear.
Compressor pump locking or seizing.

Knocking or Tapping Sound from Pump.

Quick Check: Listen for repetitive metallic knocking coming from the crankcase while the compressor runs.

Fix Suggestion: Inspect the Rolair 31104840CH1 connecting rod assembly for excessive wear, loose fasteners, or damaged bearing surfaces, replace worn components immediately to avoid crankshaft damage.

Prevention Tip: Maintain proper compressor oil levels and change oil regularly to reduce internal friction.

Excessive Compressor Vibration.

Quick Check: Check whether vibration increases under heavy load or during startup.

Fix Suggestion: Verify the connecting rod is properly aligned and securely installed, inspect related piston components for uneven wear.

Prevention Tip: Avoid running the compressor with low lubrication or contaminated oil.

Compressor Building Pressure Slowly.

Quick Check: Monitor tank fill time compared to normal compressor performance.

Fix Suggestion: Inspect the connecting rod assembly for play or wear affecting piston stroke and compression efficiency.

Prevention Tip: Replace worn piston rings and rod components together during major compressor pump service.

Compressor Pump Seizing or Locking Up.

Quick Check: Rotate the pump manually after disconnecting power to check for resistance or binding.

Fix Suggestion: Examine the connecting rod assembly and crankshaft surfaces for scoring, overheating, or damaged bearing contact areas.

Prevention Tip: Prevent overheating by operating the compressor within recommended duty cycles and maintaining proper ventilation.

Customer Experience: One compressor owner reported that replacing the Rolair 31104840CH1 connecting rod assembly eliminated severe pump knocking during startup.

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Rolair 31104840CH1 Air Compressor Connecting Rod Assembly

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Knocking or Tapping Sound from Pump.

Excessive Compressor Vibration.

Compressor Building Pressure Slowly.

Compressor Pump Seizing or Locking Up.

Customer Experience: One compressor owner reported that replacing the Rolair 31104840CH1 connecting rod assembly eliminated severe pump knocking during startup.