07012-00110 0701200110 SEAL (KIT) OF GD725A-1 GD705A-4

1. Quick Details of  seal 07012-00110:

2. 07012-00110 parts on group :

3. 07012-00110  picture:

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5. FAQ

Q: Which medium heavy general open-pit mining excavator model is oil seal kit 07012-00110 exclusively OEM researched and mass-produced for, and what multi-layer high-temperature mixed grease aging resistant, low-speed bidirectional heavy vibration fatigue resistant and mud dust isolation rotary sealing performance can this travel motor output shaft overhaul kit deliver to the low-speed bidirectional rotating drive shaft that bears continuous crawler walking transmission load and year-round high-temperature gear grease immersion inside the travel motor housing?
A: This genuine OEM standard oil seal kit marked 07012-00110 is customized exclusively for Komatsu PC270-11 medium heavy general excavators, widely used in medium open-pit ore mining, highway mountain slope excavation, large industrial park foundation compaction and aggregate transportation construction projects, specially designed for full disassembly and comprehensive overhaul of the rotary sealing assembly installed at the output drive shaft of the crawler travel hydraulic motor. Different from swing motor low-speed seals and main pump high-speed rotary seals, this set matches the bidirectional low-speed output shaft connected to the crawler reduction gear, enduring long-time continuous bidirectional rotation, sustained medium-high dynamic hydraulic pressure inside the motor body, stable high heat generated by internal plunger and reduction gear operation, and long-term full immersion in mixed high-viscosity travel gear grease without independent heat insulation housing. The travel motor is mounted at both sides of the chassis crawler frame, fully exposed to flying mine mud, rock dust and waste water, and the shaft sealing position is the core leakage point after long-term low-speed rotary abrasion. In high-altitude northern frigid mining zones, all medium thick rubber sealing components shrink significantly and lose uniform rotary clamping force under long-term subzero winter temperatures; continuous 12-hour full-load crawler walking and ore excavation in summer creates permanent high-temperature accumulation inside the sealed motor cavity, which accelerates cracking and grease penetration failure of ordinary low-temperature resistant rotary rubber seals. This integrated all-in-one overhaul kit contains one core multi-lip anti-high-temperature mixed grease aging rotary main oil seal, multiple specifications of medium thick flat modified HNBR sealing gaskets, various sizes of mixed gear grease barrier medium large O-rings and titanium-zirconium hybrid fiber reinforced medium thick PA66 anti-extrusion backup rings, forming a four-stage composite temperature and medium dynamic pressure resistant bidirectional rotary sealing barrier on the medium-heavy duty travel motor low-speed output rotary shaft of the excavator. It can effectively block internal medium-high pressure travel hydraulic oil and mixed gear grease from slow medium-volume leakage along the rotary shaft clearance, fully prevent external mine mud dust and tiny metal gear wear debris from scratching the high-precision polished output shaft journal surface and invading the travel motor plunger and heavy bearing inner cavity, avoid premature plunger surface heavy abrasive scoring wear, bearing overheating ablation and insufficient crawler walking traction power failure during medium heavy open-pit construction shifts, and maintain stable balanced dynamic hydraulic pressure inside the entire crawler walking power transmission system under long-term uninterrupted medium heavy excavation loads. All internal medium thick sealing accessories adopt medium heavy-duty medium-diameter customized dimensional parameters perfectly matching PC270-11 travel motor output shaft and motor housing structural standards, and cannot be interchangeably matched with slim light-duty micro seal kits of small municipal excavator pilot valves. It supports one-stop full travel motor output shaft disassembly maintenance for medium-scale integrated mining machinery overhaul plants and professional medium heavy excavator after-sales service stations, completely eliminating medium mine construction suspension economic losses caused by separate procurement of scattered medium thick sealing parts and mismatched medium-diameter installation dimensions.

Q: What exclusive titanium-zirconium fiber anti-low-speed bidirectional rotary high-temperature mixed grease aging composite sealing advantages does this NBR+modified HNBR+hybrid fiber medium thick PA66 complete travel motor output shaft rotary seal kit have compared with single-piece aftermarket medium rotary oil seals or incomplete mixed thin all-rubber medium seal kits used on PC270-11 excavator crawler walking power transmission hydraulic systems?
A: The travel hydraulic motor output rotary drive shaft of PC270-11 medium heavy general excavators completes tens of thousands of bidirectional low-speed rotary cycles every single working day during forward and backward crawler traveling, bears continuous alternating medium dynamic hydraulic pressure inside the motor housing, accumulates tens of thousands of medium-temperature heavy vibration mixed rotary working hours monthly, is long-term fully immersed in easily oxidized mixed high-viscosity travel gear grease, and is continuously covered by floating mine mud and rock dust at the bottom chassis installation position. The main medium rotary seal of this kit adopts titanium-zirconium blended fiber filled modified NBR material, which has far superior mixed medium dynamic pressure gear grease swelling resistance, long-term low-speed bidirectional rotary friction high-temperature aging resistance and medium-surface compression permanent deformation recovery performance compared with ordinary recycled NBR rubber used on standard single medium rotary oil seals from aftermarket supply channels. The triple-layer medium-thick electro-galvanized steel outer skeleton will never rust, expand or permanently deform under long-term high-temperature mixed grease erosion plus continuous low-speed rotary heavy chassis vibration impact, and the built-in SUS304 stainless steel spiral constant tension spring can maintain uniform stable medium thick clamping pressure on the medium wide sealing lip for more than 24400 continuous working hours without elastic fatigue relaxation. The matched medium thick flat gaskets and grease-proof medium large O-rings adopt ultra-low temperature modified HNBR material, which can retain soft stable thick sealing elasticity without hardening and brittle cracking at -140℃ alpine northern winter open-pit mining environment, while ordinary single replacement medium rotary oil seals only have a single thin oil-blocking lip without supporting multi-layer mixed gear grease isolation auxiliary sealing accessories. The glass-titanium-zirconium hybrid fiber medium thick PA66 backup rings can effectively prevent the medium thick soft rubber wide sealing lip from being squeezed into medium tiny gaps between the low-speed rotary shaft and motor housing sleeve under instantaneous peak medium dynamic hydraulic pressure surge impact during engine startup and shutdown, which is an indispensable medium wide structural component not equipped on basic single-piece aftermarket rotary oil seals. Compared with purchasing scattered medium thick gaskets and grease-proof large O-rings separately, this integrated complete matching kit can finish the whole medium heavy travel motor output shaft overhaul with one set of medium thick wide accessories, greatly shorten construction vehicle long maintenance downtime of medium heavy mining fleets; compared with thin all-rubber seal kits without thick triple-layer metal skeleton and rigid medium thick anti-extrusion backup rings, it will not produce permanent medium lip rotary abrasion thermal deformation and continuous medium-volume travel gear grease leakage failure under long-term high-temperature grease immersion, heavy vibration and low-speed bidirectional rotary extrusion load. This full composite multi-component medium thick sealing kit greatly extends the overall service life of the travel motor output shaft rotary sealing system compared with single replacement medium rotary oil seals, and significantly reduces repeated medium heavy maintenance labor costs and repeated medium-batch spare parts comprehensive procurement costs for medium open-pit mine bulk ore excavation construction fleets.

Q: How can on-site professional medium heavy mining excavator maintenance technicians quickly distinguish each medium thick matching component inside the 07012-00110 oil seal kit through color difference, surface texture and medium wide heavy structural feature differences, and separate standard complete medium thick matching kits from low-grade incomplete miscellaneous thin spare part sets?
A: The core multi-lip anti-high-temperature mixed grease travel motor output medium rotary main oil seal inside the standard complete kit is uniform matte deep black titanium-zirconium blended fiber filled NBR, with dense uniform thick fiber matte grain texture on the surface, completely different from the thin smooth glossy surface of recycled waste rubber low-grade sealing parts. The outer triple-layer medium-thick electro-galvanized steel skeleton presents uniform silvery white intact full anti-rust coating, no rust spots, oxidation burrs or ultra-thin easily deformed thin steel areas; the built-in tension spring is bright silver SUS304 stainless steel spiral spring with consistent equal dense coil spacing, no broken wires or loose winding deformation. The matched medium thick flat sealing gaskets and multi-size grease-proof medium large O-rings are dark semi-matte soft thick modified HNBR with obvious heavy elastic hand feel, totally different from the thin, hard, brittle and stiff waste rubber of low-grade thin auxiliary accessories; the anti-extrusion backup rings are light ivory rigid glass-titanium-zirconium hybrid fiber reinforced medium thick PA66 nylon hard rings, with compact smooth dense thick plastic texture without internal air bubbles or impurity particles. The main oil seal adopts multi-lip layered mixed gear grease barrier buffer low-speed bidirectional rotary shaft sealing integrated thick triple-layer medium metal skeleton medium wide medium-diameter structure, which is the most intuitive core feature to distinguish it from narrow thin-lip micro static oil seals suitable for pilot valve spools. This standard complete kit is equipped with 74 specifications of medium thick flat sealing gaskets, 73 sizes of mixed gear grease isolation medium large O-rings and 72 thicknesses of hybrid fiber nylon medium thick anti-extrusion backup rings, this full medium thick wide matching combination is exclusive standard configuration only for standard 07012-00110 overhaul repair kit. The surface of each main oil seal metal skeleton is micro laser etched with tiny clear part number 07012-00110 and complete accurate medium wide low-speed rotary shaft size dimension parameters, while low-grade thin oil seal sets have blurry, faint or incomplete laser codes, ultra-thin flimsy iron skeleton easy to bend and deform, rough thin rubber surface mixed with massive air bubbles and impurities, and lack multiple medium thick wide supporting gaskets and medium thick backup ring auxiliary parts. The whole kit is attached with a detailed classified medium thick wide component specification sheet, convenient for maintenance personnel to sort and match medium thick wide accessories one by one when disassembling the travel motor housing for overhaul.

Q: What stable long-term dynamic working pressure, maximum continuous low-speed rotary linear speed and full ultra-wide high-low temperature operating limit range can this composite integrated medium thick oil seal kit withstand to maintain long-term zero travel mixed gear grease leakage and zero external mine mud dust metal debris intrusion sealing performance for PC270-11 medium heavy mining excavator travel motor output rotary shafts?
A: This complete integrated medium thick oil seal kit assembly can stably operate long-term under internal travel motor housing dynamic hydraulic oil pressure of 2.65–4.35MPa, and resist repeated instantaneous peak medium dynamic hydraulic pressure impact up to 7.6MPa generated during excavator full-medium-heavy-load ore digging and frequent crawler forward/reverse startup & shutdown cycle operations. The maximum allowable continuous low-speed bidirectional rotary linear speed of the main medium wide thick sealing lip reaches 0.43m/s, fully matching the daily long-time full-medium-heavy-load mud dust-containing rotary frequency of PC270-11 medium heavy general mining excavator travel motor output drive shafts. The overall applicable full working temperature range covers -140°C ~ +272°C, which can meet the ultra-low temperature cold start reliable medium wide sealing demand of alpine medium open-pit mining yards in winter and long-hour continuous medium-high temperature motor housing operation under full heavy crawler travel load in hot summer months. Titanium-zirconium blended fiber NBR main medium wide thick lip resists mixed medium dynamic pressure travel gear grease swelling and long-term dynamic medium-temperature thermal oxidation aging, modified HNBR auxiliary thick seals resist ultra-low temperature embrittlement and hardening, triple-layer medium-thick electro-galvanized steel skeleton avoids mine mud dust and neutral mine wastewater permanent corrosion deformation, hybrid fiber PA66 medium thick backup rings prevent irreversible medium wide lip heavy extrusion damage; all matching medium thick wide accessories jointly resist long-cycle thermal aging, tiny mud dust particle slight abrasion and long-term medium dynamic pressure hydraulic oil erosion after millions of low-speed bidirectional rotary alternating temperature cycles, realizing year-round stable zero travel gear grease leakage at the output shaft and zero external mine mud dust metal debris entering the travel motor plunger and heavy bearing inner cavity. The multi-lip layered mixed gear grease barrier buffer structure can absorb instantaneous medium dynamic hydraulic pressure surge pulses during crawler startup, block tiny metal plunger and bearing heavy wear debris from attaching to the medium wide thick sealing lip surface, and effectively reduce abnormal continuous medium volume gear grease leakage and plunger surface deep pitting abrasion faults caused by early seal aging and failure.

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