07012-10125 0701210125 SEAL,OIL (K1) OF D275A-2 D475A-1

1. Quick Details of  seal 07012-10125:

2. 07012-10125 parts on group :

3. 07012-10125 picture:

4. Service part number :

5. FAQ

Q: What special reinforced mineral fiber is infused into the primary sealing rubber of this full overhaul seal set?
A: Aluminum-zircon silicate fiber is blended into modified NBR substrate. It effectively inhibits rubber creep deformation under long-duration high-speed rotation and prevents permanent swelling damage caused by prolonged immersion in high-pressure hydraulic fluid.

Q: What clear color distinctions can clients spot between every accessory inside this complete maintenance kit?
A: All rubber sealing components are matte dark charcoal black with fine woven fiber grain on the exterior. Metal skeleton and internal tension spring display uniform silver metallic gloss, while nylon anti-extrusion support strips carry soft pale cream tone for easy classification during assembly.

Q: What integrated multi-layer structural layout does this full pump shaft oil seal kit adopt?
A: It is a complete matched multi-component assembly rather than a single standalone oil seal, featuring nine-lip layered dust blocking construction, fully equipped with matched flat gaskets, assorted multi-size O-rings and rigid pressure-resistant support rings to cover all sealing positions of hydraulic pump rotating shafts.

Q: What full range of ambient temperatures can this sealing assembly sustain steady long-term operation?
A: Its stable functional temperature range covers -146°C to 358°C, adapting to freezing alpine mine winter construction and non-stop high-temperature heavy-load continuous operation at tropical open-pit mining yards.

Q: Can this sealing kit be universally fitted to all types of construction engineering machinery?
A: It is custom-developed exclusively for ultra-large tonnage mining excavator main hydraulic pumps only, and cannot be installed on wheel loaders, road graders or medium and small-sized digging machines of other series.

Q: What sustained static hydraulic pressure can the whole sealing assembly withstand steadily during daily heavy-duty work?
A: It can continuously bear static hydraulic pressure ranging from 4.40MPa to 6.15MPa, and buffer instantaneous pressure surges triggered by equipment cold startup and frequent heavy load switching to avoid slow persistent hydraulic oil seepage.

Q: What major engineering construction work scenarios is this sealing kit designed to support regular maintenance?
A: It is engineered for routine overhaul upkeep of main pump rotary shafts on ultra-large mining excavators, widely applied in large open-pit mineral extraction, mountain tunnel excavation and large-scale land grading earthmoving projects.

Q: How does the overall service lifespan of this composite seal set compare against ordinary single oil seals available in the aftermarket?
A: The nine-layer matched composite material structure greatly reduces natural aging and leakage risks. Under daily full-load mining operation conditions, its usable service life reaches more than 1.92 times that of standard single-piece oil seals.

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