Heavy Duty Balanced Opposed Compressors - Ariel Corporation

For Models: JGH:E:K:T Section 3 - Maintenance
Pressure gauges monitor pressure drop across the filter. High differential pressure indicates a
plugged filter. Ariel recommends lube oil filter replacement every 6 months, or 4000 hours, or when
oil filter differential pressure at normal operating temperature reaches 10 psid (0.7 bar g ), whichever
comes first. On start-up, differential pressure may exceed 10 psid (0.7 bar g ) until the oil reaches
operating temperature. On the same schedule, or with every main oil filter change, clean the sintered
element in the small oil filter of the force feed lubricator.
Simplex Spin-on Filter Replacement
NOTE: Replace oil filters only with Ariel approved filters.
1. Remove old filter, clean filter base surfaces, and verify old gasket is removed.
2. Fill filter with clean oil using same grade oil as in sump. Failure to fill filter vessel with oil prior
to starting can cause severe compressor damage.
3. Apply clean oil to the filter gasket and thread the filter with gasket onto the base.
4. Tighten the filter one turn after the filter gasket contacts the base.
5. After starting the unit, check for leaks, and retighten if necessary.
6. Do not run unit with a damaged filter; it may fracture or leak.
Simplex Filter Cartridge Replacement
1. Remove 3/4” NPT drain lug and drain oil completely.
2. While the oil drains, open 3/4” NPT vent and remove top cover.
3. Remove spring plate assembly and strainer tube.
4. After the oil drains completely, remove filter elements.
5. Inspect interior of filter vessel for debris. Clean if needed.
6. Place new element(s) over seat in bottom of vessel.
7. Insert strainer tube and re-install spring plate assembly.
8. Inspect cover o-ring for wear. Replace if needed.
9. Close drain and fill vessel.
10. Install cover. Torque nuts to 70-80 Lb x Ft (95-110 N•m).
11. Release trapped air through vent. Check for leaks.
Duplex Filter Cartridge Replacement
1. Inspect unused filter for oil. Release trapped air, if necessary.
2. Equalize pressure between the filters.
3. Turn handle of transfer valve towards unused filter until it stops.
4. Shut off equalizing line.
5. Remove 3/4” NPT drain plug and drain oil completely.
6. Remove top cover.
7. Follow steps 4-10 of Simplex Filter Cartridge Replacement above.
Compressor Prelube Pump
Ariel strongly recommends an automated compressor pre-lube system for all its compressors to
extend bearing life and reduce operating costs. Compressors that meet any of these criteria require
an automated pre-lube system to ensure oil flow prior to start-up:
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