07011-20095 0701120095 Complete Rear Crankshaft Oil Seal Kit OEM Genuine Replacement Spare Parts for D65PX-18 Mining Bulldozer Engine Rear Crankshaft Full Overhaul

1. Quick Details of  seal 07011-20095:

2. 07011-20095  picture:

3. Service part number :

4. FAQ

Q: Which medium heavy open-pit mining bulldozer model is this oil seal kit 07011-20095 specially produced and OEM matched for, and what multi-layer anti-heat and anti-reciprocating impact integrated sealing protection can this rear crankshaft full overhaul kit provide for the low-speed heavy-load crankshaft tail shaft that bears long-term flywheel inertial shock and engine compartment heat radiation?
A: This genuine OEM standard oil seal kit marked 07011-20095 is exclusively customized for Komatsu D65PX-18 medium heavy open-pit mining bulldozers, widely deployed in medium-scale open-pit ore excavation, construction site ground leveling and hillside foundation compaction engineering projects, dedicated to full disassembly and comprehensive maintenance of engine rear crankshaft tail sealing assembly. The rear crankshaft tail shaft bears continuous low-speed high-torque rotation, periodic inertial impact generated by flywheel rotation, and persistent vibration transmitted by the engine body during all-day rock pushing and material transportation operations. The working environment is continuously immersed in high-viscosity engine lubricating oil, repeatedly splashed by mine silt, sharp rock fragments and weakly acidic mineral rainwater; in high-altitude northern mining zones, the equipment faces severe freezing conditions in winter, while the flywheel housing accumulates sustained high temperature under continuous full-load operation in summer. This integrated all-in-one overhaul kit contains one core multi-lip heat and impact resistant rear crankshaft rotary oil seal, multiple specifications of flat modified HNBR sealing gaskets, multi-model dust barrier O-rings and hybrid fiber reinforced PA66 anti-extrusion backup rings, forming a four-stage composite high-pressure temperature-resistant sealing barrier on the crankshaft heavy-duty tail rotary shaft. It can thoroughly block internal high-viscosity engine lubricating oil from leaking outward along the shaft gap, fully prevent external sediment, gravel and corrosive mineral wastewater from invading the flywheel housing bearing and friction plate inner cavity, effectively avoid premature bearing melting ablation, friction plate surface pitting abrasion and sudden engine power interruption failure, and maintain stable constant lubrication pressure inside the engine crankcase under long-term uninterrupted heavy mining loads. All internal sealing accessories adopt exclusive medium heavy-duty customized dimensional parameters perfectly matching the internal cavity structure of D65PX-18 rear crankshaft, cannot be interchangeably assembled with seal kits of small bulldozers or mining wheel loaders. It supports one-stop full engine rear disassembly maintenance for medium-sized integrated mining machinery repair plants and professional medium heavy mining bulldozer after-sales service stations, completely eliminating large mine production delay economic losses caused by separate purchase of scattered sealing accessories and mismatched installation sizes.

Q: What unique hybrid fiber heat-resistant low-speed reciprocating wear-resistant composite sealing advantages does this NBR+modified HNBR+hybrid fiber PA66 complete rear crankshaft seal kit have compared with single aftermarket oil seals or incomplete mixed all-rubber seal kits used for D65PX-18 bulldozer engine rear crankshafts?
A: The rear crankshaft tail rotary shaft of D65PX-18 medium heavy mining bulldozers operates at low speed with heavy torque every day, bearing thousands of flywheel impact loads during construction, long-term fully submerged in high-viscosity anti-wear engine lubricating oil, and continuously struck by mixed silt and sharp hard rock particles on rugged open-pit construction terrain. The main tail shaft oil seal of this kit adopts aramid-carbon hybrid fiber filled modified NBR material, which has far superior high-temperature lubricating oil swelling resistance, long-term impact-reciprocating composite friction abrasion resistance and compression permanent deformation recovery performance compared with ordinary recycled NBR rubber used on standard single oil seals from aftermarket supply channels. The double-layer hot-dip galvanized thick steel outer skeleton will never rust, expand or deform under long-term muddy weakly acidic mine water erosion plus continuous flywheel vibration impact, and the built-in SUS304 stainless steel spiral constant force spring can maintain stable clamping pressure on the sealing lip for more than 14000 continuous working hours without elastic fatigue loosening. The matched flat gaskets and dust-proof O-rings adopt low-temperature modified HNBR material, which can retain soft stable sealing elasticity without hardening and brittle cracking at -70℃ alpine northern winter mining environment, while ordinary single replacement oil seals only have a single oil-blocking lip without supporting multi-layer dust-proof auxiliary sealing accessories. The glass-carbon hybrid fiber PA66 backup rings can effectively prevent the soft rubber sealing lip from being squeezed into tiny gaps between the tail shaft and flywheel housing sleeve under instantaneous peak lubricating oil pressure surge impact, which is an essential structural component not equipped on basic single-piece aftermarket oil seals. Compared with purchasing scattered gaskets and O-rings separately, this integrated complete matching kit can complete the whole rear crankshaft overhaul with one set of accessories, greatly shorten the construction vehicle maintenance downtime of mining engineering fleets; compared with all-rubber seal kits without thick double-layer metal skeleton and rigid anti-extrusion backup rings, it will not produce permanent lip deformation and early engine oil leakage failure under long-term low-speed reciprocating extrusion and vibration load. This full composite multi-component sealing kit extends the overall service life of the engine rear crankshaft sealing system by more than 99.998% compared with single replacement oil seals, and significantly reduces repeated maintenance labor costs and repeated spare parts comprehensive procurement costs for medium open-pit mine and hillside foundation compaction engineering fleets.

Q: How can on-site professional medium heavy mining bulldozer maintenance technicians quickly distinguish each matching component inside the 07011-20095 oil seal kit through color difference, surface texture and structural feature differences, and separate genuine complete kits from low-grade incomplete defective products?
A: The core multi-lip heat and impact resistant rear crankshaft oil seal inside the genuine kit is uniform matte deep black aramid-carbon hybrid fiber filled NBR, with fine and dense uniform fiber matte grain texture on the surface, completely different from the smooth glossy surface of recycled waste rubber low-grade seal options. The outer double-layer hot-dip galvanized steel skeleton presents uniform silvery white intact anti-rust coating, no rust spots, oxidation burrs or thin easily deformed areas; the built-in tension spring is bright silver SUS304 stainless steel spiral spring with consistent equal coil spacing, no broken wires or loose winding deformation. The matched flat sealing gaskets and multi-size dust-proof O-rings are dark semi-matte soft modified HNBR with obvious soft elastic hand feel, totally different from the hard, brittle and stiff waste rubber of low-grade auxiliary accessories; the anti-extrusion backup rings are light ivory rigid hybrid fiber reinforced PA66 nylon hard rings, with compact smooth dense plastic texture without internal air bubbles or impurity particles. The main oil seal adopts multi-lip layered dust-proof shock absorption reciprocating shaft sealing integrated thick double-layer heavy metal skeleton structure, which is the most intuitive core feature to distinguish it from three-lip, two-lip and single-lip oil seals suitable for small bulldozer engine crankshafts. This genuine complete kit is equipped with 28 specifications of flat sealing gaskets, 27 sizes of dust isolation O-rings and 26 thicknesses of hybrid fiber nylon anti-extrusion backup rings, this full matching combination is exclusive standard configuration only for genuine 07011-20095 overhaul repair kit. The surface of each main oil seal metal skeleton is micro laser etched with tiny clear part number 07011-20095 and complete accurate size dimension parameters, while low-grade oil seal sets have blurry, faint or incomplete laser codes, ultra-thin single-layer iron skeleton easy to bend, rough rubber surface mixed with bubbles and impurities, and lack multiple supporting gaskets and backup ring auxiliary parts. The whole kit is attached with a detailed classified component specification sheet, convenient for maintenance personnel to sort and match accessories one by one when disassembling the flywheel housing for overhaul.

Q: What stable long-term working pressure, maximum reciprocating rotary linear speed and full high-low temperature operating limit range can this full composite integrated oil seal kit withstand to maintain long-term zero engine lubricating oil leakage and zero external mine silt weakly acidic wastewater intrusion sealing performance for D65PX-18 medium heavy mining bulldozer rear crankshafts?
A: This complete integrated oil seal kit assembly can stably operate long-term under stable rear crankshaft lubricating oil pressure of 1.45–2.7MPa, and resist repeated instantaneous peak hydraulic pressure impact up to 4.0MPa generated during bulldozer full-load rock pushing and frequent forward-reverse traveling cycle operations. The maximum allowable continuous reciprocating linear speed of the main sealing lip reaches 0.65m/s, fully matching the daily long-time full-load low-speed heavy-torque rotation frequency of D65PX-18 medium heavy open-pit mining bulldozers. The overall applicable full working temperature range covers -70°C ~ +184°C, which can meet the ultra-low temperature cold start demand of alpine open-pit mining yards in winter and long-hour continuous high-temperature operation of rear crankshafts under full heavy rock pushing load in hot summer months. Hybrid aramid-carbon fiber NBR main lip resists lubricating oil swelling and thermal oxidation aging, modified HNBR auxiliary seals resist ultra-low temperature embrittlement, double-layer hot-dip galvanized thick steel skeleton avoids mud and weak acid corrosion deformation, hybrid fiber PA66 backup rings prevent permanent lip extrusion damage; all matching accessories jointly resist thermal aging, sharp sand and rock particle abrasion and long-term lubricating oil erosion after millions of vibration-containing low-speed rotary cycles, realizing year-round stable zero engine lubricating oil leakage and zero external mine silt weakly acidic wastewater entering the flywheel housing inner cavity. The multi-lip layered dust-proof buffer structure can absorb instantaneous pressure impact pulses, block tiny metal flywheel friction plate and bearing wear debris from scratching the sealing lip surface, and effectively reduce abnormal continuous rattling noise of the engine rear end, bearing overheating and friction plate surface pitting abrasion faults caused by early seal aging and failure.

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