Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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Section 3 - Maintenance For Models: JGH:E:K:T 14. Check and re-calibrate all required instrumentation. 15. Clean crankcase breather filter with suitable solvent. 16. Check and, if needed, adjust drive chains. See ER-74 for procedure. 17. If the compressor is equipped with crankcase over-pressure relief valves, visually inspect and exercise valves to manufacturer recommendations. 18. Check fastener torques of gas nozzle flange, valve cap, piston rod packing, crosshead pin through bolt, crosshead guide to frame, crosshead guide to cylinder, cylinder mounting flange to forged steel cylinder, distance piece to cylinder, distance piece to crosshead guide, and tandem cylinder to cylinder. Two-Year (16,000 Hour) Maintenance 1. Perform all Daily, Monthly, Six-Month, and One-Year maintenance. 2. Rebuild oil wiper cases. 3. If applicable, use new piston and stem seals to rebuild actuators on suction valve unloaders and fix volume pneumatic pockets. Replace piston stem assemblies where stem is damaged or worn. 4. Check auxiliary end chain drive for undercut sprocket teeth and chain for excessive stretching. Replace as required. Three-Year (24,000 Hour) Maintenance 1. Perform all Daily, Monthly, Six-Month, and One-Year maintenance. 2. Replace non-ELP connecting rod bearings for JGE:T:C:D:U:Z:B:V and KBB:V. See Maintenance and Repair manual for procedure. NOTE: Main and connecting rod bearing wear and replacement intervals are heavily dependent on many factors including speed, load, oil temperature, oil cleanliness, and oil quality. Depending on the severity of service, the bearing maintenance interval may be longer or shorter. Four-Year (32,000 Hour) Maintenance 1. Perform all Daily, Monthly, Six-Month, One-Year, and Two-Year maintenance. 2. Remove crosshead pins. Measure and log crosshead pin to crosshead pin bore and connecting rod bushing bore clearances. Check the crosshead pin end caps and through bolt for wear. Replace if needed. 3. Check for bushing wear in the auxiliary end drive chain tightener. 4. Check for ring groove wear in pistons. Six-Year (48,000 Hour) Maintenance 1. Perform all Daily, Monthly, Six-Month, One-Year, Two-Year, and Three-Year maintenance. 2. Replace lubricator distribution blocks. 3. Replace crosshead and connecting rod bushings. See Maintenance and Repair Manual for procedures. 4. Replace connecting rod bearings. See Maintenance and Repair Manual for procedure. 5. Replace main bearings. See Maintenance and Repair manual for procedure. PAGE 3-6 3/11
For Models: JGH:E:K:T Section 3 - Maintenance Checking Lubrication Oil Pump The oil pump constantly supplies oil to all journal bearings, bushings, and crosshead sliding surfaces. It directly couples to the crankshaft by a chain and sprocket and provides adequate oil flow to bearings when the compressor operates at the minimum speed rating (typically half of maximum rated speed). Discharge Suction Remove Dust Cap to expose Safety Relief Valve Adjustment Screw. FIGURE 3-1 Lube Oil Pump - Typical Crankshaft driven oil pumps maintain oil pressure with a spring-loaded safety relief within the pump head (some models use a separate pressure regulator). To raise or lower lube system pressure, adjust the spring compression on this valve. With a separate oil pressure regulating valve, Ariel sets the spring-loaded safety relief within the pump head to approximately 75 psig (5.2 barg ) to prevent high oil pump discharge pressures that could damage the pump. In this case, do not adjust the pump safety relief valve except with a new pump installation. Oil Pressure Regulating Valve Without a separate oil pressure regulating valve, Ariel sets the oil pump safety relief valve to regulate pressure at 60 psig (4.1 barg ) into the compressor when crankshaft speed equals or exceeds minimum normal operating speed. If oil pressure into the compressor at minimum operating speed and normal operating temperature does not read about 60 psig (4.1 barg ), adjust the oil pump safety relief valve. With compressor running at minimum rated speed, remove dust cap and turn the adjustment screw clockwise to increase oil pressure, or counter-clockwise to decrease it. With a separate lube oil pressure regulating valve, Ariel sets normal oil pressure into the compressor at the regulating valve to 60 psig (4.1 barg ) when crankshaft speed equals or exceeds minimum normal operating speed. NOTE: If oil pressure drops below 50 PSIG (3.5 barg ) when crankshaft speed equals or exceeds minimum rated operating speed, find the cause and correct it. Low Oil Pressure Shutdown The packager normally mounts a customer specified low oil pressure shutdown. Ariel provides an oil pressure pickup fitting on the oil gallery located after the filter. Set the electric or pneumatic oil pressure switch to actuate when oil pressure falls below 45 psig (3.1 barg). An alarm set to actuate when oil pressure falls below 50 psig (3.4 barg) is desirable. Please note: 1. The compressor requires a working low oil pressure shutdown. When shut down as a result of low oil pressure, DO NOT re-start until fault is found and corrected. 2. Do not add oil to the crankcase through the breather hole while the unit runs. This causes oil foaming and unnecessary no-flow shutdowns in the force feed lubrication system. 3. When the force feed lubrication system has a common supply (from the crankcase), it constantly uses oil from the crankcase. This requires an oil sump level controller designed to allow oil to flow into the crankcase from an overhead tank at all ambient temperatures. 3/11 PAGE 3-7
Page 1: Maintenance and Repair Manual For J
Page 4 and 5: For Models: JGE:H:K:T Oil Strainer.
Page 6 and 7: For Models: JGE:H:K:T SECTION 5 - S
Page 8 and 9: For Models: JGH:E:K:T FIGURE 4-23
Page 10 and 11: For Models: JGH:E:K:T General Safet
Page 12 and 13: For Models: JGH:E:K:T Ariel Contact
Page 14 and 15: Section 1 - Tools For Models: JGH:E
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Section 4 Part Replacement For Mode
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Section 5 - Start Up For Models: JG
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Section 6 - Troubleshooting For Mod
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Section 6 - Troubleshooting For Mod
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Appendix A Ariel Fasteners and Torq
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Appendix B - Clearances For Models:
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Appendix C - Frame Specifications F
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Appendix C - Frame Specifications F
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Appendix D Compressor Clearance, Oi
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Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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