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Atlas Copco Qc1001 Engine

Name: Atlas Copco Qc1001 Engine
Brand: Atlas Copco

The Atlas Copco Qc1001 is an engine. It powers generator sets from Atlas Copco, including the QAS 38, QAS 38 YdS TNV and QAS 38 YdS TNV USA.

Also known as: Atlas Copco Qc1001

On this pageSpecs Generator sets Maintenance FAQ

Engine specifications

Generator sets powered by this engine

Atlas Copco QAS 38Atlas Copco QAS 38 YdS TNVAtlas Copco QAS 38 YdS TNV USA

How to read your Atlas Copco engine serial & model number →

Common problems

Unstable voltage
Cause: - Speed variation in engine.
Fix: Check regularity of rotation.
The starter motor turns the engine too slowly
Cause: - Battery capacity too low. - Bad electrical connection. - Fault in starter motor. - Wrong grade of lubricating oil.
The engine does not start or is difficult to start
Cause: - Starter motor turns engine too slowly. - Fuel tank empty. - Fault in fuel control solenoid. - Restriction in a fuel pipe. - Fault in fuel lift pump. - Dirty fuel filter element. - Air in fuel system. - Fault in atomisers. - Cold start system used incorrectly. - Fault in cold start system. - Restriction in fuel tank vent. - Wrong type or grade of fuel used. - Restriction in exhaust pipe.
Rotating bridge failure
Cause: - Check diodes, disconnect cables.
Regulator out of setting
Fix: Regulate stability of regulator by acting on “STABILITY” potentiometer.
Not enough power
Cause: - Restriction in a fuel pipe. - Fault in fuel lift pump. - Dirty fuel filter element. - Restriction in air filter/cleaner or induction system. - Air in fuel system.
No residual voltage
Fix: For an instant apply on the + and – terminals of the electronic regulator a 12 V battery voltage with a 30 Ω resistor in series respecting the polarities.
Lower than rated voltage at load
Cause: - Voltage potentiometer out of setting.
Fix: Reset voltage potentiometer.
Low voltage at no load
Cause: - Voltage potentiometer out of setting.
Fix: Reset voltage.
Loose sensing wires on AVR
Fix: Check sensing wires on AVR.
Insufficient residual voltage
Fix: Increase the speed by 15 %.
Higher than rated voltage at load
Cause: - Voltage potentiometer out of setting.
Fix: Reset voltage potentiometer.
High voltage at no load
Cause: - Voltage potentiometer out of setting.
Fix: Reset voltage potentiometer.
Failed regulator
Fix: Substitute regulator.
Current too high, power factor lower than 0.8; speed lower than 10 % of rated speed
Cause: - Failed regulator.
Fix: Substitute regulator.

Compiled from service & troubleshooting documentation across every generator set that uses the Atlas Copco Qc1001.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Air filter	Clean, Replace		—	500 hr
Fuel filter			—	250 hr
Oil filter			—	500 hr
Battery	Replace		—	2000 hr
Belt			—	500 hr
Coolant	Check	21.38 USgal	—	2000 hr
Coolant filter			—
Oil	15W40		—	2000 hr
Spark plug			—	500 hr

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

Common questions

Which generators use the Atlas Copco Qc1001 engine?

The Atlas Copco Qc1001 powers 3 generator set(s), including Atlas Copco QAS 38, Atlas Copco QAS 38 YdS TNV, Atlas Copco QAS 38 YdS TNV USA.

How often should you change the oil in the Atlas Copco Qc1001?

The Atlas Copco Qc1001 oil change interval is every 2000 hours.

What is a common problem with the Atlas Copco Qc1001 engine?

A commonly reported issue on generators using the Atlas Copco Qc1001 is: Unstable voltage. Cause: - Speed variation in engine.. Fix: Check regularity of rotation..