Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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FOR MODELS: JGZ AND JGU SECTION 5 - MAINTENANCE Chain Idler Sprockets Replacement - (Eccentric Adjustment Caps) 1. Remove the frame auxiliary end top cover and gasket. Remove the cap screws that hold the eccentric adjustment caps to the end cover. Rotate the eccentric caps to loosen the chains for removal. Remove the chain master link when applicable. After dropping the chain off an idler sprocket, the entire assembly can be removed from the end cover. 2. Remove the lock nut, hex cap screw, and Stat-O-Seal washer. Discard all three items since they must be replaced with new parts. Remove and discard the cap o-ring. 3. Reassemble all parts using a new cap screw, Stat-O-Seal washer, sprocket, and lock nut. Tighten the idler lock nut to the recommended torque given in Table 1- 11 on Page 1-18. 4. Apply new clean lubricating oil, same type as is used in the frame, and install a new o-ring. Install the assembly and chain. Adjust the chain according to the instructions given in “Chain Adjustment” on Page 5-31. Cap Screws (2) Sprocket Eccentric Adjustment Cap Oil O-Ring Before Assembly Plain Washer Lock Nut Stat-O-Seal Washer Oil O-Ring Before Assembly FIGURE 5-22 CHAIN IDLER SPROCKETS Lube Oil Pump Chain Sprocket Replacement Cap Screws (4) Sprocket Eccentric Adjustment Cap Through Cap Screw Force Feed Lubricator Chain Idler Frame Lube Oil Pump Chain Idler 1. Drain the oil from the crankcase. Remove all piping from the pump. Remove bolting and rotate eccentric adjusting cap on the chain idler to loosen the chain. Remove the chain. Remove the bolting from the pump mounting flange and the sprocket will come free through the hole in the end cover. 2. Measure the exact distance from the outer edge of the sprocket to the face of the pump mounting flange in order to position the new sprocket. Note this measurement for future reference. 3. With the oil pump on a bench, use an Allen Wrench to remove the sprocket set screws; then, pull the sprocket from its shaft. 4. Remove the square key, 3/8 x 2 inches (9.38 x 50.8 mm) long, from the shaft and file the shaft to smooth out any burrs raised by the cup point of the set screw. 7/09 PAGE 5 - 33
FOR MODELS: JGZ AND JGU SECTION 5 - MAINTENANCE 5. Install a new square key, 3/8 x 2 inches (9.38 x 50.8 mm) long, after first checking to make sure the key will fit into the new sprocket. If the key is too thick, it can be polished with an emery cloth on a flat surface until it can easily slide into the notch. It may also be a little high and require filing of the top edge. 6. Install a new sprocket and adjust the distance between the sprocket and the adapter outer surface to the previous measurement. When it is correctly positioned, tighten the set screws. 7. Install a new gasket. Before reinstalling the pump, apply a thin coating of antiseize lubricant to the gasket surfaces. This will aid in easy removal at a later date. 8. Reinstall the pump onto the end cover and check the alignment with the other sprockets using a straight edge. 9. Reinstall chain, and adjust the chain according to the instructions in “Chain Adjustment” on Page 5-31. Reinstall the piping at the pump. Refill the crankcase with the proper oil. Square Key Sprocket Set Screws Gasket FIGURE 5-23 LUBE OIL PUMP CHAIN SPROCKET Force Feed Lubricator Chain Sprocket Replacement 1. Remove bolting and rotate eccentric adjusting cap on the chain idler to loosen chain. Remove chain. With a good machinist rule, measure the exact distance from the inside of the auxiliary end cover the near edge face of the chain sprocket. Note the measurement for the proper positioning of the new sprocket. Loosen the hex on the Fenner drive. Remove the sprocket and Fenner drive. Detach all tubing to the lubricator. 2. Remove the four mounting bracket cap screws and remove the lubricator box. 3. When the lubricator box is removed, it is a good time to consider replacing the shaft seal. Polish out any burrs on the shaft before installing a new seal. 4. With the lubricator box on the bench, apply new clean lubricating oil, same type as is used in the frame, to a new o-ring and install it. 5. Disassemble Fenner drive, clean and inspect. Lubricate threads with new clean lubricating oil, same type as is used in the frame, and reassemble the Fenner PAGE 5 - 34 7/09 Pump
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Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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