Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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FOR MODELS: JGZ AND JGU SECTION 5 - MAINTENANCE drive. 6. Remount the lubricator to the end cover. 7. Put the Fenner drive and a new sprocket onto the shaft. 8. Set the lubricator sprocket to the measured dimension. 9. Tighten the Fenner drive hex to the torque value in Table 1-11 on Page 1-18. Note that the tightening action may cause the sprocket to move toward the cover slightly. After tightening recheck the cover to sprocket dimension, loosen, adjust and retighten as required until the new measurement equals the original measurement. 10. Check alignment to crankshaft drive sprocket, with the crankshaft centered in end play, using a straight edge to within a 1/32 inch (1mm). If not in alignment, adjust force feed lubricator sprocket position as necessary. 11. Install chain and adjust using the instructions given in “Chain Adjustment” on Page 5-31. 12. Re-attach all tubing to the lubricator. FF Pump Priming Stem FF Pump Plunger Stroke Adjustment Screw Lock Nut Lubricator Box Oil Fill Connection Sight Glass Lubricator Box Oil Overflow Drain FF Oil Inlet Header Drain Plug Inlet From Header Connection for a Priming Pump Rupture Disk Blow-Out Fitting Seal Oil O-Ring Before Assembly Outlet To Distribution Block Lubricator Box Bearing Housing - Left Hand Threads Drive Chain Sprocket Fenner Drive - See Figure 5-25 Use Purchased Separately, Bearing Housing Spanner Wrench P/N A-8158, If Removing Bearing Housing. FIGURE 5-24 FORCE FEED LUBRICATOR BOX CHAIN SPROCKET - TYPICAL 7/09 PAGE 5 - 35
FOR MODELS: JGZ AND JGU SECTION 5 - MAINTENANCE Piston and Rod - Removal FIGURE 5-25 FENNER DRIVE COUPLING ! CAUTION TO PREVENT PERSONAL INJURY, BE SURE THAT COMPRESSOR CRANKSHAFT CANNOT BE TURNED BY THE DRIVER OR COMPRESSOR CYLINDER GAS PRES- SURE DURING MAINTENANCE: -- ON ENGINE-DRIVEN COMPRESSORS, REMOVE THE COUPLING CENTER MEMBER OR LOCK THE FLYWHEEL. -- ON ELECTRIC MOTOR-DRIVEN COMPRESSORS, IF IT IS INCONVENIENT TO DETACH THE DRIVER FROM THE COMPRESSOR, THE DRIVER SWITCH GEAR MUST BE LOCKED OUT DURING MAINTENANCE. BEFORE PERFORMING ANY MAINTENANCE, COMPLETELY VENT SYSTEM. BEFORE REMOVING A CYLINDER HEAD OR VVCP, BACK OFF ALL CAP SCREWS 1/8 INCHES (3 mm). MAKE SURE THE HEAD OR VVCP IS LOOSE AND THE CYLIN- DER IS COMPLETELY VENTED. 1. For non-lube cylinders, reference “Cleaning, Handling and Thread Lubricants for Non-Lubricated Compressor Cylinders” on Page 5-66. 2. Remove the crosshead guide side covers and gaskets. Loosen the cylinder head or VVCP cap screws to the Caution above. 3. Manually rotate the crankshaft to move the crosshead to near its inner dead center position. Back off, but do not remove, the crosshead-balance nut set screws. Loosen the crosshead-balance nut with the hydraulic crosshead-balance nut torque tool (G-12645) and appropriate pump, see Figure 5-10 on Page 5-16. Ref to “Crosshead - Removal” on Page 5-9 for the proper use of the tool. 4. Remove the cylinder head or VVCP. In the case of tandem cylinders where the outboard cylinder bore is smaller than the inboard bore, it is necessary to remove the outboard cylinder. Support such cylinders during removal and installation, as to not put excessive weight on the piston and rod assembly which might cause bending. 5. Use the <strong>Ariel</strong> furnished Piston Turning Tool (B-3472) to unscrew the piston-rodassembly out of the crosshead, see Figure 5-28 on Page 5-40. The two dowels on the tool fit the holes in the piston nut. Turn the crosshead-balance nut off the PAGE 5 - 36 7/09
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Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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