Heavy Duty Balanced Opposed Compressors

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FOR MODELS: JG AND JGA SECTION 5 - MAINTENANCE The bushing must be installed into the connecting rod by cooling the bushing in a dry ice and alcohol solution. The bushing needs to be left in the solution long enough to reach the same temperature as the solution, about -120°F (-85°C). DO NOT TOUCH COLD SURFACES WITHOUT PROPER INSULATION TO PREVENT INJURY. NOTE: ABSOLUTE CLEANLINESS IS REQUIRED OF BOTH THE BUSHING AND THE CONNECTING ROD TO PREVENT DIRT FROM ACCUMULATING BETWEEN THE BUSHING AND CONNECTING ROD. Connecting Rod - Installation 1. Snap the half bearing shell into the rod with the bearing tab properly located in the notch on the rod. With the crankcase top cover off, turn the throw to the inner dead center position and slide the rod into the crosshead guide space. NOTE: THE CAPS AND RODS ARE NUMBERED BY THROW BEGINNING WITH NUM- BER ONE AT THE DRIVE END. ALWAYS INSTALL RODS WITH THE NUM- BERS UP. BE SURE TO PROTECT CRANK PIN AT ALL TIMES. 2. Fit the connecting rod to the crank pin and turn to the highest position. Replace the cap, the half bearing shell properly located in the notch, and the bolts. Snug up all bolts. Do not tighten bolts to full torque at this point. 3. Reconnect the rod and the crosshead with the pin. Install the end plates, the thru bolt and lock nut. Tighten the lock nut to the value listed in Table 1-15 on page 1-15. 4. Tighten the connecting rod bolts in 25% increments to full torque to the values listed in Table 1-15 using a crisscross pattern. 5. Measure each crankshaft to connecting rod bearing jack clearance, with a dial indicator and magnetic stand, to the values listed in Table 1-2 on page 1-8. Turn the crankshaft pin up and mount the indicator stand on an adjacent web with the stem of the indicator on the rod above the centerline of the pin. Push down on the rod, set indicator to zero, then pry up on the head of the connecting rod bolt with a bar, observe and record reading Note: Install Throw Marking and Joint Match Marks Up Correct Orientation of the Rod is with Bearing Notches on Top Joint. FIGURE 5-1: CONNECTING ROD - TYPICAL 6. Reinstall the spacer bars. All spacer bars are match-marked for proper location. They must be reinstalled in their original location. Tighten all spacer bar bolts to the value listed in Table 1-15 on page 1-15. PAGE 5 - 4 11/01
FOR MODELS: JG AND JGA SECTION 5 - MAINTENANCE 7. Examine the removed top cover and side cover gaskets. If there is any doubt about their condition, install new gaskets. Before installing old or new gaskets, apply an anti-seize lubricant to both sides to aid in their easy removal at a later date. Replace the top cover and crosshead guide cover. Tighten all capscrews. Crosshead - Removal Shoes Roll Pin End Plate Thru Bolt End Plate FIGURE 5-2: CROSSHEAD - TYPICAL ! Crosshead Pin Bushing Roll Pin Thru Bolt CAUTION Thru Bolt Lock Nut End Plate BEFORE REMOVING THE CYLINDER HEAD, BACK OFF ALL CAPSCREWS TO 1/8 INCHES (3 mm). MAKE SURE THAT THE HEAD IS LOOSE AND THE CYLINDER IS VENTED. SEE IMPORTANT SAFETY INFORMATION PLATES ON UNIT TOP COVER, (REFERENCE FIGURE 1-3: ON PAGE 1-3 FOR LOCA- TION.) Crosshead Nut Set Screw - Loosen Before Turning Nut 11/01 PAGE 5 - 5
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ARIEL Heavy Duty Balanced Opposed C
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FOR MODELS: JG AND JGA TABLE OF CON
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FOR MODELS: JG AND JGA TABLE OF CON
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FOR MODELS: JG AND JGA SECTION 1 -
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Heavy Duty Balanced Opposed Compressors

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