Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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Section 4 Part Replacement For Models: JGH:E:K:T Chain Adjustment 1. Roll the crankshaft to the tightest position of the chain. This prevents snugging the chain at a slack position and breaking rollers, or ruining the pump and lubricator bearings when the chain goes through its tightest position. 2. Use a tape measure to measure the longest most easily accessible span from sprocket center to sprocket center, where the deflection will be gauged. Determine allowable deflection limits for the measured span as defined by the shaded areas in Fig. 4-47. 2 to 10 lb (9 to 45 N) Finger Pressure Machinist’s Scale Straight Edge Span Length 3. Measure chain deflection from a straight edge held on the chain rollers where it wraps over the two sprockets of the span. Use a machinist’s scale with 0.01 inch or (0.5 mm) increments FIGURE 4-46 Chain Deflection Measurement - Typical to measure the deflection distance from the straight edge to a chain roller at the center of the span. Apply a force of 2 to 10 lb (9 to 45 N) finger pressure to take the slack out of the chain. Do not apply excessive force since a force feed lube box drive shaft can bend and provide an inaccurate deflection measurement. Finger pressure is adequate. 4. If adjustment is required, remove the capscrews and plastic plugs from the eccentric cap. Rotate the cap clockwise to line up the first two new capscrew holes. If this tightens the chain too much, turn the cap counterclockwise for a different hole alignment. 5. Replace and tighten the two capscrews hand wrench tight. 6. Roll crankshaft to check tightness in several positions. At its tightest position, the chain should deflect within the shaded limits in the figures below. Replace plastic caps to keep holes clean. Deflection 1.00 (25) 0.90 (23) 0.80 (20) 0.70 (18) 0.60 (15) 0.50 (13) 0.40 (10) 0.30 (8) 0.20 (5) 0.10 (3) 0.00 2 (51) 3 (76) Max. Deflection Min. Deflection 4 5 6 7 8 9 (102) (127) (152) (178) (203) (229) 10 (254) 11 (279) 12 (305) 13 (330) 14 (356) 15 (381) 16 (406) 17 (432) 18 (457) Length of Measured Span FIGURE 4-47 Allowable Chain Deflection, Inches (mm) Permissible Deflection PAGE 4-40 3/11
For Models: JGH:E:K:T Section 4 Part Replacement Chain and Sprocket Replacement Replace chain(s) if elongation exceeds 0.084 inches (2.13 mm) over a 10 pitch length. Measure the section of chain with vernier calipers while it is stretched tight in position in the compressor. Add a reading outside the rollers at 10 pitches to a reading between the inside of the same rollers, and then divide by two. If the result exceeds 5.084 inches (129.1 mm) for 1/2 pitch chain, replace the chain. Replace sprockets showing any undercutting. Chain Idler Sprockets Replacement (Eccentric Adjustment Caps) 1. Chain idler sprocket location varies for standard rotation (clockwise, when viewed at the drive end, standing at the coupling) versus reverse rotation. 2. Remove frame top cover. Remove the two capscrews holding eccentric adjustment cap to end cover. Rotate eccentric cap to loosen chain for removal. Drop the chain off the idler sprocket and remove the entire assembly from the end cover. 3. Remove and discard lock nut, hex capscrew, Stat-O-Seal washer, and cap O-ring. 4. Reassemble new capscrew, Stat-O-Seal washer, sprocket, and lock nut. Tighten idler lock nut to recommended torque in Table A-3 in Appendix A. 5. Apply oil and install a new O-ring. Install the assembly and chain. Adjust the chain according to “Chain Adjustment” on page 4-40. Lube Oil Pump Sprocket Replacement 1. Remove all pump piping. Remove fasteners from pump mounting flange. After chain removal, the pump with sprocket comes free through the end cover hole. 2. To position the new sprocket, use a machinist rule to measure the exact distance from sprocket drive face to pump mounting flange face. 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. JGE:K:T/6 Lube Oil Pump Chain Idler Capscrew (2) Plain Washer Self Lock Nut Stat-O- Seal- Oil O-Ring before assembly Sprocket Through Bolt JGE:K:T/6 Force Feed Lubricator Chain Idler JGH:E:K:T/2/4 Chain Idler FIGURE 4-48 Chain Idler Sprockets (Eccentrics) Set Screws Sprocket Adapter FIGURE 4-49 Lube Oil Pump Chain Sprocket - Typical Square Key 4. Remove the square key, 3/16 x 1 inches (4.8 x 25 mm), from the shaft and file the shaft to smooth burrs raised by the set screw cup point. 3/11 PAGE 4-41 Pump Gaskets
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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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Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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