Ariel Heavy Duty Balanced Opposed Compressor JGQ/1

Warning: Ensure all power to the Unit is shut off and the system is vented of gas before servicing.

After running a new compressor (or after a re-location, re-configuring or major overhaul) for the first 24 hours, shutdown, vent gas system and perform a hot alignment check at coupling within 30 minutes, while barring driver shaft to packager’s recommendations.

Realign if necessary to hold coupling hub face and rim hot alignment within 0.005 inch (0.13 mm) TIR, except for hub O.D. >17 in. (>43 cm) angular hub-face limit is increased to 0°1’ (0.0167°).

Check fastener torque on gas nozzle flange, valve cap, cylinder head, compressor rod; packing flange and, if applicable, crosshead guide to frame bolting.

If bearing temperatures increase or a visual inspection of the crankcase indicates bearing wear, check main, connecting rod and crankshaft-thrust bearing clearances.

Replace affected bearings if clearances are out of tolerances.

Check frame oil pressure. It should be 50 to 60 psig (3.5 to 4.2 barg) when at operating temperature.

Check frame oil level. It should be visible in the sight glass and approximately mid-level when running, if not, determine and correct cause.

Check lubricator block cycle time. Refer to information plate on top of lubricator box for correct cycle time.

Check crosshead pin to crosshead pin bore and connecting rod bushing bore by removing crosshead pins.

Check for excessive wear in the auxiliary end drive chain tightener.

Check for excessive ring groove wear in pistons.

Sign off on the compressor maintenance

Drain and replace lubricator box oil.

Change oil filter or when oil filter differential pressure exceeds the filter change value.

Change oil. A more frequent oil change interval may be required if operating in an extremely dirty environment or if the oil supplier recommends it or if an oil analysis dictates it.

Clean sintered element in the small oil filter supplied on the force feed lubrication system or every time main oil filter is changed.

Clean strainer when oil is changed.

Open frame when oil is changed and visually inspect for foreign material. Disassembly is not recommended unless a reason for it is found.

Check fluid level in torsional vibration damper (if applicable). Take fluid sample for viscosity testing.

Re-tighten hold down stud-nuts to proper torque values. Inspect for frame twist or bending to be sure the main bearing bores are in alignment.

Realign if necessary to hold coupling hub face and rim hot alignment within 0.005 inch (0.13 mm) TIR, except for hub O.D. >17 in. (>43 cm) angular face limit is increased to 0°1’ (0.0167°).

Safety First! Ensure the compressor is shut down and the gas system is vented before starting.

Fastener torque on gas nozzle flanges, valve caps, cylinder heads and compressor rod packing flanges checked and confirmed?

If fasteners turned at the first month check, they should be re-checked after the second month or 1300 hours. If loosening persists, consult your packager or Ariel.

Safety shutdown functions checked and confirmed?

Upload the frame oil sample analysis report

If the oil analysis results indicate, change oil. If an oil analysis indicates lead, tin or copper particles in the oil, check main, connecting rod and crankshaft-thrust bearing clearances.

Bearing clearances checked and within limits?

If bearing clearances are outside of the limits, replace the affected bearings.

Sign off on the compressor maintenance

Check main, connecting rod, and crankshaft-thrust bearing clearances with a pry bar and dial indicator.

Are bearing clearances within the limits?

Check crosshead guide clearance with feelers.

Is crosshead guide clearance within the limits?

Inspect valves for broken plates and loose center bolts.

Inspect cylinder bores for damage or wear.

Are piston ring end gaps within the maximum limit?

Inspect piston rods for damage and excessive wear.