The shaft bearing snap ring (391-2686-063) is a critical internal fastening component located within the front shaft end cover or mounting flange assembly of the Parker PGP330 series. While small, it plays a vital structural role in high-pressure hydraulic circuits:
Component Blowout Prevention: It serves as a mechanical safety barrier, keeping the shaft assembly locked in place even when the hydraulic system encounters sudden pressure spikes or extreme shock loads.
Axial Load Retention: External gear pumps driven by mechanical gears, pulleys, or inline Power Take-Off (PTO) shafts experience severe forward and backward thrust forces. The snap ring locks the outboard drive shaft bearing securely inside its housing groove, absorbing these heavy axial thrust vectors.
Shaft Alignment Protection: By preventing the input shaft and bearing assembly from shifting axially, the snap ring ensures that internal components—such as the gear set, thrust plates, and high-pressure lip seals—remain perfectly aligned. This minimizes localized friction and uneven wear.
| G101/102 C101/102 | ||
| 101 SNAP RING | 391-2681-487 | 391-2681-493 |
| C ONLY RETAINER RING | 391-3782-126 | |
| C ONLY SNAP RING | 391-2688-003 | |
| 102 SNAP RING | 391-2686-063 | 391-2686-065 |
| PGP020/021 | ||
| SHAFT BEARING SNAP RING | 391-2686-063 | |
| CONTINENTAL SHAFT BRG. RETAINER SNAP RING | 391-2685-011 | |
| PGP030/031 | ||
| CONTINENTAL SHAFT BRG.RETAINER SNAP RING | 391-2685-011 | |
| PGP050/051 | ||
| SHAFT BRG.SNAP RING | 391-2686-065 | |
| CONTINENTAL SHAFT BRG. RETAINER SNAP RING (MAY NOT BE REQ) | 391-2685-040 | |
| PGP075/076 | ||
| SHAFT BRG. SNAP RING | 391-2686-025 | |
| CONTINENTAL SHAFT BRG.RETAINER SNAP RING | 391-2685-029 | |
| PGP315 | ||
| SEAL RETAINER SNAP RING MOTOR ONLY | 391-2686-016 | |
| CONTINENTAL SHAFT BRG.RETAINER SNAP RING | 391-2685-011 | |
| PGP330 | ||
| SHAFT BRG.SNAP RING | 391-2686-063 | |
| CONTINENTAL SHAFT BRG.RETAINER SNAP RING | 391-2685-011 | |
| PGP350 | ||
| SHAFT BRG.SNAP RING | 391-2686-065 | |
| CONTINENTAL SHAFT BRG.RETAINER SNAP RING | 391-2685-040 | |
| PGP365 | ||
| SHAFT BRG.SNAP RING | 391-2686-025 | |
| PIGGYBACK CONNECTING SHAFT BEARING SNAP RING | 391-2686-019 |
Other Products
Company Profile
Ruichen Hydraulic Machinery Manufacturing Co., Ltd., established in 2000, is a global provider of high-quality hydraulic solutions. Located in Hebei Province, China, our 55,000 m² factory employs over 300 staff, including 15 engineers and 5 senior engineers. We specialize in cast iron gear pumps, gear motors, and hydraulic control valves, widely used in construction machinery, agricultural equipment, mining, and industrial applications.
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