Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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Section 4 Part Replacement For Models: JGH:E:K:T Crossheads Crosshead Removal CAUTION: Before removing a cylinder head, back off all cap screws 1/8 inch (3 mm). Verify the head is loose and the cylinder is completely vented. CAUTION: Crossheads are heavy. Handle with care to avoid personal injury. The balance sheet that comes in the manual with each compressor lists each crosshead weight. 1. Remove crosshead guide side covers and (head end) cylinder head or unloader. 2. Move crosshead to its inner dead center position. Back off, but do not remove, the crosshead nut set screws. 3. Loosen crosshead nut with the special slugging Peg or Open End Wrench, depending on nut type (see Fig. 1-1). Or use separately purchased hydraulic crosshead nut torque tool (see Fig. 1-2). Shoe Area Roll Pin Bushing Thru Bolt Crosshead Pin End Plate End Plate End Plate Thru Bolt Lock Nut Crosshead Nut Set Screw - Loosen before turning nut 4. Use the Piston Nut Spanner shown in Fig. 1-1 to thread the piston rod out of FIGURE 4-29 Crosshead - Typical 5. the crosshead. The two dowels on the Adapter fit holes in the piston nut. Thread the crosshead nut off the piston rod. Push the rod end forward to the edge of the packing to provide clearance for crosshead removal. With crosshead in its outer dead center position, remove crosshead pin thru-bolt, lock nut, endplates and pin. Discard old lock nut. 6. Turn crankshaft to its inner dead center position. Move crosshead to its outer dead center position, free of the connecting rod. Support connecting rod so it does not drop and damage the crosshead guide surface. 7. Remove oil wiper packing from crosshead guide diaphragm. 8. Install Crosshead Installation/Removal Tool as shown in Fig. 4-31. 9. Push crosshead onto Crosshead Installation Tool (see Fig. 4-31) and rotate crosshead 90°. 10. Slide a 3/16 inch (5 mm) thick plate into the gap between the crosshead and crosshead guide (see Fig. 4-31) 11. Remove diaphragm from crosshead guide and slide crosshead out of crosshead guide onto the plate. 12. Check crosshead pin to bushing clearance (see Table B-1 in Appendix B). Determine pin wear by inspection. 13. Replace pin, if necessary. To replace bushings, hacksaw or file to within 1/32 inches (1 mm) of their thickness, then drift them out. PAGE 4-24 3/11 Roll Pin Thru Bolt
For Models: JGH:E:K:T Section 4 Part Replacement 14. New bushing installation requires a press. To install a bushing in the crosshead, cool the bushing in 95% alcohol with dry ice solution. Leave the bushing in the solution long enough to reach the same temperature as the solution, about -110°F (-80°C). CAUTION: Do not touch cold surfaces without proper protection. Alcohol is flammable; use it only in open air or well-ventilated buildings. Avoid sparks and open flame. Avoid alcohol vapors which may cause injury to nose and eye tissue. Do not return solution to a closed container until it reaches room temperature or container may explode. NOTE: Directly support the crosshead side FIGURE 4-30 Crosshead receiving the new bushing to prevent the press Bushing Replacement from possibly crushing the crosshead (see Fig. 4-30). Thoroughly clean bushing and crosshead to prevent dirt accumulation between bushing and crosshead bore. 15. Inspect shoe surfaces; there should be no wear whatsoever. Crosshead Installation NOTE: Return crossheads to their original throw location. Use frame oil for lubrication where needed. 1. Lay a 3/16 inch (5 mm) thick plate in the bottom of the crosshead guide and lay crosshead on its side (see Fig. 4-31). Oil crosshead and guide surfaces. 2. Mount Crosshead Installation Tool onto crosshead guide diaphragm and oil tool bearing surfaces. See Fig. 4-31. With tool mounted on diaphragm, install diaphragm into crosshead guide. Slide crosshead onto tool. NOTE: Long 2-compartment crosshead guides supplied prior to 11/08 require a crosshead installation tool with a smaller pilot diameter. Contact <strong>Ariel</strong> for the proper tool. 3. Remove 3/16 inch (5 mm) thick plate. Rotate crosshead 90°. Slide crosshead into guide and off of the installation tool. Verify it does not become cocked. If crosshead becomes wedged, do not force it. Ease it off and start again. Be careful not to damage crosshead shoe surface during installation. 4. Remove crosshead installation tool and reinstall wiper packing. Approximately 3 Tons (27kN) Force Required Crosshead Installation Tool (A-1858) Bushing Do Not Support Here Crosshead Inner Support 3/16” (5 mm) Thick Plate FIGURE 4-31 Crosshead Installation 3/11 PAGE 4-25
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Maintenance and Repair Manual For J
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For Models: JGE:H:K:T Oil Strainer.
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For Models: JGE:H:K:T SECTION 5 - S
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For Models: JGH:E:K:T FIGURE 4-23
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For Models: JGH:E:K:T General Safet
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For Models: JGH:E:K:T Ariel Contact
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Section 1 - Tools For Models: JGH:E
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Section 1 - Tools For Models: JGH:E
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Section 2 - Instrumentation For Mod
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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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