Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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Section 4 Part Replacement For Models: JGH:E:K:T ton; it should not protrude more than 0.010 in. (0.25 mm) past the piston face. The nut should be flush or recessed. 7. Perform steps 12 through 14 in “Manual Piston and Rod Reassembly” on page 4-10. Piston and Rod Installation 1. Install piston/rod assembly with piston rings and wear band into cylinder. The threaded crosshead end of the rod is 1/4 inches (6mm) smaller than the inside diameter of the packing. An entry sleeve is unnecessary with reasonable care, but a plastic sleeve may help prevent damage to packing rings. The <strong>Ariel</strong> tool box includes a piston rod entry sleeve (see Fig. 1-1). 2. See “Crosshead Installation” on page 4-25 for details to re-attach piston rod to crosshead, check piston end clearance, piston rod runout and crosshead clearances, and re-assemble to close cylinder and crosshead guide. Crosshead Nut Crosshead Set Screw Piston Rod Runout Check piston rod run out after new unit installation, unit relocation, or maintenance that may affect rod run out. Verify proper shimming of crosshead guides to level. Verify the crossheads directly contact the bottom of the crosshead guide. A 0.0015 inch (0.04 mm) feeler stock should not insert more than 1/2 inches (13 mm) at all four corners of the crosshead. Position the stem of a 0.0001 inch (0.001 mm) increment calibrated dial indicator against the piston rod, close to the packing case. Set indicator to zero with piston toward the crank end. Take readings in both vertical and horizontal directions. When measuring vertical rod movement, record upward movement as positive and downward movement as negative. When measuring horizontal rod movement, record movement toward the auxiliary end of the frame as positive and Piston Nut Spanner (turns Tool A-1678) FIGURE 4-12 Piston and Rod Installation - Typical Ratchet Extension Support Tool TABLE 4-3 Maximum Acceptable Piston Rod Run Out Readings Direction Inches (mm) Vertical 0.0020 (0.051) Horizontal 0.0010 (0.025) movement toward the drive end of the frame as negative. Copy Table 4-4 below to record readings. Rotate crankshaft manually and record readings at mid-stroke and with piston at the head end. Compare readings to Table 4-3. PAGE 4-14 3/11
For Models: JGH:E:K:T Section 4 Part Replacement TABLE 4-4 Piston Rod Run Out Run Out Measurement Throw 1 Throw 2 Throw 3 Throw 4 Throw 5 Throw 6 VERTICAL HORIZONTAL If a vertical reading is greater than the maximum acceptable, follow this procedure: 1. With the piston at the head end, use feeler gages to determine clearance at the top of the piston. On wear band or rider ring pistons, this clearance is over the rings or band. 2. Divide feeler top clearance by two, then subtract 0.005 inches (0.13 mm). Place a feeler of this calculated thickness under the bottom of the piston. Place the feeler under the wear band or rider ring on wear band or rider ring pistons. Use a feeler long enough to stay under the piston throughout its entire stroke. 3. Re-measure vertical run out and compare to acceptable limits in Table 4-3. Use horizontal readings taken without feelers for acceptance. Copy Table 4-5 and record calculations and readings. 4. If readings are not within acceptable limits after worn parts replacement and piping alignment correction, replace the piston rod assembly. Piston Rings Piston @ CE Mid-Stroke Piston @ HE 0 0 0 0 0 0 Piston @ CE Mid-Stroke Piston @ HE 0 0 0 0 0 0 TABLE 4-5 Feeler Thickness to Correct for Piston Weight LINE THROW NUMBER: 1 2 3 4 5 6 1 Top Feeler Clearance 2 Line 1 (/2) 3 Line 2 - 0.005 inches (-0.13mm) 4 Bottom Feeler Thickness 5 Vertical, Piston @ CE 0 6 Vertical, Piston @ HE Most JGH:E:K:T cylinders use one-piece angle-cut filled PTFE piston rings. High-pressure cylinders use two-piece thermoplastic rings. <strong>Ariel</strong> recommends replacing rings when the end gap increases to three times the new dimension. To measure end gaps, insert rings in the cylinders without pistons (see Table B-4 in Appendix B for new and maximum end gap dimensions). Piston Ring Installation 1. Place the rings in the piston grooves. Compress rings manually. 2. Verify notches of two-piece high-pressure face-cut piston rings face toward the pressure and away from the wear band (see Fig. 4-13). 3. With rings fully compressed in the grooves, insert rod and piston into cylinder. Ensure rings stay 3/11 PAGE 4-15
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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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Page 58 and 59: Section 4 Part Replacement For Mode
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Page 114 and 115: Section 6 - Troubleshooting For Mod
Page 116 and 117: Appendix A Ariel Fasteners and Torq
Page 118 and 119: Appendix A Ariel Fasteners and Torq
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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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