Sandvik / Tamrock
870 902 79a O-Ring
DD321-40
Available — Request Quote| Part Number | 870 902 79a |
| Description | O-Ring |
| Brand | Sandvik (Tamrock) |
| Assembly | Tank, Hydraulic |
| Type | Drill Rig Spare Part |
Quick answer
870 902 79a (also written 87090279a or 870-902-79a) is a Sandvik o-ring spare part used in the Tank, Hydraulic assembly of the Sandvik DX700. Verified compatible with 30 Sandvik machine models including DD320S, DD321-40, DD321-40C. Available as an aftermarket replacement drill part from BK Drilling — Turkey-based Sandvik and Epiroc spare parts supplier serving mining contractors worldwide. Quote on request via WhatsApp; typical lead time 3-7 days for stock items.
Part code alternate forms: 87090279a, 870 902 79a, 870-902-79a.
Compatible machines
30
OEM cross-reference
870 902 79a
About Sandvik 870 902 79a O-Ring
This O-ring provides critical sealing in the hydraulic or pneumatic circuits of the Sandvik DX700. Part of the Tank, Hydraulic, it prevents fluid leakage at connection points and maintains system pressure integrity essential for efficient drilling operations.
This is an OEM-compatible aftermarket replacement part for the Sandvik DX700 (DX700). Also compatible with Tamrock branded equipment of the same model series. BK Drilling supplies this part with fast worldwide shipping and competitive pricing.
Frequently asked questions
Why do O-rings fail in drilling equipment?
O-rings fail due to chemical degradation from hydraulic fluid, extreme temperature cycling, excessive pressure spikes, improper installation (twisting or pinching), and age-related hardening. Using the correct material compound for each application is critical.
