Ariel Heavy Duty Balanced Opposed Compressor JGP/1

Warning: Ensure the compressor is shut down and vented before starting maintenance.

After running a new compressor (or after a re-location, re-configuring or major overhaul) for the first 24 hours, perform a hot alignment check at coupling within 30 minutes.

Is the coupling hub face and rim hot alignment within 0.005 inch (0.13 mm) TIR?

Are fastener torque on gas nozzle flange, valve cap, cylinder head, compressor rod; packing flange and, if applicable, crosshead guide to frame bolting checked and tightened?

Are bearing temperatures normal and no visual signs of bearing wear?

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

Is the frame oil level visible in the sight glass and approximately mid-level when running?

Is the lubricator block cycle time correct?

Are primary and secondary packing vents for blowing checked?

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 the maintenance.

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

Safety shutdown functions checked and confirmed?

Upload the frame oil sample analysis report

Does the oil analysis indicate lead, tin or copper particles in the oil?

If the oil analysis indicates presence of lead, tin or copper particles, check main, connecting rod and crankshaft-thrust bearing clearances.

Are bearing clearances within the 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.

Check crosshead guide clearance with feelers.

Inspect valves for broken plates and loose center bolts.

Inspect cylinder bores for damage or wear.

Inspect piston rods for damage and excessive wear.

Rebuild cylinder packing cases.

Check and re-calibrate all temperature and pressure gauges.

Check and record compressor rod run out.