Atlas Copco Oil Filter – 1903 0601 11
Quick Specs
– Part Number: 1903 0601 11
– Description:Oil Filter
– Application:Oil-free piston
– Product Status: Original
– Availability: In Stock
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The 1903-0601-11 is Atlas Copco’s genuine oil filter for the HN series of oil-free piston compressors — a different application from the oil-injected screw compressor filters found elsewhere in our catalog, so it’s worth double-checking your compressor type before ordering if you’re not certain. It’s listed as equivalent to 1901-9026-74. Country of origin is India, consistent with Atlas Copco’s HN-series piston compressor production base.
Technical Details
| Part Number | 1903060111 |
| Description | Oil Filter |
| Brand | Atlas Copco |
| Status | Original |
| Condition | New |
| Weight | 0.47kg |
| Dimension | 12*10*10cm |
| Application | HN Oil-Free Piston Compressors |
| Packaging | Box |
| Availability | In Stock |
| Country of Origin | India |
Equivalent / Replaced Part Numbers
– 1901902674
Compatibility and part numbers are for reference only.
What Happens When the Filter Clogs?
Oil filters include a bypass valve that opens once the filter becomes too restricted,allowing oil to keep flowing — unfiltered — rather than starving the compressor of lubrication.This is a safety mechanism,but it also means a clogged filter can go unnoticed:
the compressor keeps running normally,while unfiltered oil (and whatever contaminants it ‘s carrying)circulates through the bearings and rotor.Unlike an air filter,where reduced airflow is a gradual,detectable symptom,a bypassed oil filter often shows no obvious sign until wear damage has already occurred — which is why sticking to the replacement interval matters more here than waiting for a visible cue.
Why Filtration Rating Matters
Oil filters are rated by micron size — the smallest particle size they reliably trap.Using a filter with a coarser rating than specified lets more contaminants circulate through the compressor,accelerating wear on bearings and rotor surfaces. A finer-than-specified rating isn ‘t automatically better either — it can restrict oil flow and trigger the bypass valve more often,temporarily allowing unfiltered oil through. Matching the original specification is the safer default.
Common Questions
What happens if I don 't change the filter on time?
The bypass valve will eventually open,letting unfiltered oil circulate.The compressor keeps running,but bearing and rotor wear can accelerate without any obvious warning sign.
Can I use a non-genuine filter with genuine oil,or vice versa?
Mixing is common in practice,but bypass valve calibration and filtration performance can differ between brands — worth ruling out as a variable if you ‘re troubleshooting an oil-related issue.
Are these genuine parts?
Yes. Parts are sourced through Atlas Copco distributor channels.
What payment methods do you accept?
T/T (bank transfer).
What is the typical lead time?
Common consumables (filters, oil) typically ship within about 1 week. Lead time for other spare parts depends on stock availability — please contact us for a confirmed schedule.
Do you inspect parts before shipment?
Yes. We provide full photos and video of the actual item before shipment, and confirm everything is correct with you prior to dispatch.
What shipping options are available?
If you have your own freight forwarder, we can ship to them directly. If not, we can provide shipping options based on your preference.