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Deutz TCD2012LO4 Engine

The Deutz TCD2012LO4 is a 4.04 L 4-cylinder liquido liquido engine. It powers generator sets from Atlas Copco, including the XAHS 146 Dd, XAHS 186 Dd, XATS 156 DD and XAVS 166 DD.

Also known as: Deutz TCD2012LO4

4.038 L

Displacement

Cylinders

On this pageSpecs Generator sets Maintenance FAQ

Engine specifications

Displacement	4.038 L
Cylinders	4
Aspiration	Liquido Liquido

Generator sets powered by this engine

Atlas Copco XAHS 146 Dd Atlas Copco XAHS 186 Dd Atlas Copco XATS 156 DD Atlas Copco XAVS 166 DD

How to read your Deutz engine serial & model number →

Common problems

After working some time, the unit stops through a shutdown switch
Cause: Fuel tank contains insufficient fuel
Fix: Fill fuel tank.
Working pressure rises during operation and causes safety valve to blow
Cause: Regulating valve incorrectly set or defective
Fix: Check and, if necessary consult Atlas Copco.
Compressor overheating
Cause: Insufficient compressor cooling
Fix: Locate compressor away from walls; when banked with other compressors, leave space between them.
Compressor is loaded automatically to full capacity after starting
Cause: Loading valve stuck in loading position
Fix: Remove and dismantle loading valve. Correct if necessary.
Compressor does not unload and engine keeps running at max. speed when closing the air outlet valves, safety valve blows
Cause: Regulating valve incorrectly set or defective
Fix: Check and, if necessary consult Atlas Copco.
Compressor capacity or pressure below normal
Cause: Air consumption exceeds capacity of compressor
Fix: Check equipment connected.
Engine overheating
Cause: Insufficient engine cooling
Fix: Relocate compressor.
Engine does not speed up immediately after compressor loading valve button has been pressed and compressor does not deliver air
Cause: Regulating valve defective
Fix: Check and, if necessary consult Atlas Copco.
Air and oil mist expelles from air filters immediately after stopping
Cause: Unloader valve jammed
Fix: Check and, if necessary consult Atlas Copco.
Unit does not load after pressing the loading button
Cause: Regulating valve defective
Fix: Check and if necessary consult Atlas Copco.
Temperatura de salida del motor alta H5
Presión de aceite baja H6
Indicación de carga H3
Fluido refrigerante insuficiente H7
Excessive compressor oil consumption. Oil mist being discharged from air outlet valves
Cause: Compressor oil level too high
Fix: Check oil level. Release pressure and drain oil to correct level.

Compiled from service & troubleshooting documentation across every generator set that uses the Deutz TCD2012LO4.

Maintenance schedule

Item	Spec	Part #	Interval
Fuel filter	Air filter element	—	1500 hr
Oil filter	Oil filter	—	300 hr
Battery	Battery	—	1000 hr
Belt	Fan belt, V-belt	—	1000 hr
Coolant	Cooling water	—	1500 hr
Oil	Lubricating oil	—	500 hr
Spark plug	Spark plug, Glow plug	—	1000 hr

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Common questions

What is the displacement of the Deutz TCD2012LO4?

The Deutz TCD2012LO4 has a displacement of 4.038 liters with 4 cylinders.

Which generators use the Deutz TCD2012LO4 engine?

The Deutz TCD2012LO4 powers 4 generator set(s), including Atlas Copco XAHS 146 Dd, Atlas Copco XAHS 186 Dd, Atlas Copco XATS 156 DD, Atlas Copco XAVS 166 DD.

How often should you change the oil in the Deutz TCD2012LO4?

The Deutz TCD2012LO4 oil change interval is every 500 hours.

What is a common problem with the Deutz TCD2012LO4 engine?

A commonly reported issue on generators using the Deutz TCD2012LO4 is: After working some time, the unit stops through a shutdown switch. Cause: Fuel tank contains insufficient fuel. Fix: Fill fuel tank..