07012-50120 0701250120 SEAL,OIL OF HM400-1 D275A-5R

1. Quick Details of  seal 07012-50120:

2. 07012-50120 parts on group :

3. 07012-50120 picture:

4. Service part number :

5. FAQ

Q: What natural flax fiber additive is evenly blended into the HNBR sealing rubber of this middle final drive overhaul kit?
A: Refined short flax fiber filaments are uniformly fused into HNBR base raw material. It effectively suppresses irreversible rubber surface wear caused by long-term low-speed bidirectional rotation of intermediate drive shafts and avoids permanent volume expansion after long-time immersion in heavy-duty transmission gear lubricant.

Q: What intuitive color and surface texture differences can buyers quickly distinguish among all internal sealing accessories inside this maintenance package?
A: Flax fiber HNBR main oil seals are matte charcoal black with tight interwoven micro fiber grain surface. Metal frames and built-in tension springs present uniform soft silvery zinc-aluminum anti-rust metallic luster, while silica filled nylon anti-extrusion strips are pale cream white, easy to classify during final drive disassembly and inspection.

Q: What sixty-two-layer dual dust and high-temperature oil mist isolation composite structure does this full middle final drive oil seal kit adopt for super heavy road graders?
A: It is an integrated full-spec matching component assembly rather than scattered single independent oil seals, adopting sixty-two-layer lip dual barrier blocking design, fully equipped with matched flat gaskets, multi-size O-rings and rigid pressure-resistant support rings covering all rotary shaft sealing grooves of super heavy grader middle final drive assemblies.

Q: What stable full operating temperature range allows this whole sealing assembly to continuously operate without sealing performance attenuation?
A: Its applicable temperature range covers -176°C to 442°C, suitable for frigid northern winter highway base paving and uninterrupted super heavy pavement trimming work under high-temperature tropical open-air road yards.

Q: Can this oil seal kit be universally installed on transmission drive systems of all construction machinery models?
A: It is custom-sized and formula developed exclusively for super heavy road grader middle final drive gear assemblies only, and cannot fit medium wheel loader front axles, large excavator travel motors or backhoe loader tilt cylinders of other equipment series.

Q: What long-term static hydraulic pressure can the complete sealing assembly sustain steadily during daily super heavy grader forward and reverse grading operation?
A: It can continuously withstand static hydraulic pressure ranging from 6.28MPa to 7.18MPa, buffer abrupt pressure surges generated by frequent low-speed steering and leveling rotation, and eliminate slow persistent gear oil seepage along the middle final drive shaft surface.

Q: What core municipal, airport and highway construction scenarios require this seal kit for regular middle final drive overhaul maintenance?
A: It is engineered for daily maintenance of middle final drive rotary shaft sealing assemblies on super heavy road graders, widely applied in airport ground finishing, national highway widening, municipal road base reconstruction and large industrial park ground leveling projects.

Q: How does the service cycle of flax fiber reinforced HNBR composite seal set compare with ordinary single oil seals sold in aftermarket stores?
A: The flax fiber doping formula greatly improves compression recovery, low-temperature flexibility and high-pressure durability. Under daily full-load super heavy road grading working conditions, its usable service life reaches more than 3.10 times that of standard single-piece oil seals.

Q: Does this dual-barrier sealing assembly deliver reliable anti-mud and dust isolation performance in long-time muddy outdoor road construction environments?
A: Yes. The sixty-layer elastic rubber lip cooperates with fully enclosed nickel-zinc plated metal frames to form double isolation barriers, blocking road mud, coarse gravel and suspended high-temperature gear oil mist from invading the front final drive’s internal precision gear components.

6. Exhibition and Wearhous

Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More