


Sandvik / Tamrock
866 354 39 U-SEAL
AXERA T12 DATA-315 C
| Part Number | 866 354 39 |
| Description | U-SEAL |
| Brand | Sandvik (Tamrock) |
| Assembly | HYDR. CYLINDER |
| Type | Drill Rig Spare Part |
Quick answer
866 354 39 (also written 86635439, 866-354-39, or 866.354.39) is a Sandvik u-seal spare part used in the HYDR. CYLINDER assembly of the Sandvik DT1330i. Verified compatible with 2 Sandvik machine models including AXERA T12 DATA-315 C, DT1330i. 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: 86635439, 866 354 39, 866-354-39.
Compatible machines
2
OEM cross-reference
866 354 39
About Sandvik 866 354 39 U-SEAL
Designed specifically for the Sandvik DT1330i HYDR. CYLINDER, this seal ensures leak-free operation of hydraulic circuits. Mining environments expose seals to extreme temperatures, pressure spikes, and abrasive particles, making periodic replacement essential for uninterrupted drilling operations.
This is an OEM-compatible aftermarket replacement part for the Sandvik DT1330i (DT1330i). 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
What happens when a hydraulic seal fails?
A failed hydraulic seal causes fluid leakage, leading to reduced system pressure, loss of machine force and speed, increased oil consumption, environmental contamination, and potential damage to pumps and valves operating without adequate fluid supply.
How can I identify worn seals in my drilling equipment?
Signs of seal wear include visible fluid leaks around cylinders and connections, reduced hydraulic system pressure, slower machine movements, increased oil consumption, and contaminated hydraulic fluid appearing milky or discolored.



