Heavy Duty Balanced Opposed Compressors
Heavy Duty Balanced Opposed Compressors
Heavy Duty Balanced Opposed Compressors
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FOR MODELS: JG AND JGA SECTION 5 - MAINTENANCE<br />
If readings are not within acceptable limits after replacing worn parts and correcting any piping<br />
misalignment, the piston rod assembly should be replaced.<br />
Piston Rings<br />
All JG and JGA cylinders use one-piece angle-cut filled Teflon piston rings, excepting tandem<br />
cylinders classes which use stepped seal-joint piston rings (refer to Figure 5-12:), and<br />
very small cylinder and rider rings which use two-piece rings.<br />
Stepped seal-joint rings are standard for high-pressure tandem cylinders. Seal-joint piston<br />
rings are directional and must be installed properly.<br />
To utilize the seal-joint rings in double acting cylinders, in place of angle cut rings, contact<br />
Ariel for new part numbers.<br />
Determining Ring Wear:<br />
Ariel recommends replacing rings when the end gap has increased three times the new<br />
dimension. To measure the end gaps, insert the rings in the cylinders without pistons. (See<br />
Table 1-6 on page 1-10, through Table 1-10; Table 1-13 and Table 1-14 for new end gap<br />
dimensions.)<br />
Removal:<br />
FIGURE 5-12: SEAL-JOINT RINGS<br />
Stamped Side<br />
Toward Pressure<br />
See paragraph 4 at “Piston and Rod - Removal” on page 5-18 for piston ring removal.<br />
11/01 PAGE 5 - 23