4732068
BACK UP RING
The BACK UP KIT 473 206 8 provides essential support for primary seals in high-pressure hydraulic components. It prevents seal extrusion and failure, ensuring consistent performance and preventing fluid leaks from critical systems like the drifter, cylinders, or hydraulic valves on your rig.
Description
The 047 320 68 BACK UP RING (4732068, 473-206-8, BACK UP RING 4732068) is a mining-duty back-up ring engineered for Sandvik drilling rigs, ROC machinery, and underground jumbos. The 047 320 68 BACK UP RING provides structural reinforcement to…
Full Technical Description
The 047 320 68 BACK UP RING (4732068, 473-206-8, BACK UP RING 4732068) is a mining-duty back-up ring engineered for Sandvik drilling rigs, ROC machinery, and underground jumbos. The 047 320 68 BACK UP RING provides structural reinforcement to primary hydraulic seals, preventing extrusion and deformation under extreme pressure, heat, and vibration during drilling operations.
This 047 320 68 BACK UP RING is manufactured from high-strength, extrusion-resistant polymer or elastomer composite materials designed to withstand abrasive dust, hydraulic-oil exposure, and continuous pressure cycling. OEM references 4732068 and 473-206-8 ensure full compatibility with Sandvik sealing systems.
Function & Operation
The 047 320 68 BACK UP RING works together with O-rings and hydraulic seals to maintain internal pressure integrity inside actuators, drifter assemblies, feed cylinders, and rotating mechanisms. By preventing seal extrusion and hydraulic leakage, it significantly extends seal life and supports stable drilling performance in mining and tunneling environments.
Reliability & Maintenance
Inspect the 047 320 68 BACK UP RING for deformation, flattening, extrusion marks, or wear. Replace 473 206 8 immediately if pressure consistency decreases or if hydraulic leakage occurs.
Benefits
- Anti-extrusion support
- improved sealing reliability
- longer component life
Industry Use
- Mining
- tunneling
- quarry drilling
- heavy hydraulic machinery
Applications
- Hydraulic cylinders
- drifter components
- rotary actuators
- high-pressure sealing systems
Specifications
| Brand | Sandvik |
|---|---|
| Machine Type | LH514 |
| Assembly | DIFFERENTIAL & CARRIER ASSEMBLY |
Used on machines
Brand
All Sandvik parts
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