07011-40068 0701140068 Full Travel Motor Oil Seal Kit OEM Genuine Replacement Spare Parts for WA320-9 Mining Wheel Loader Walking Travel Hydraulic Motor Full Overhaul

1. Quick Details of  seal 07011-40068:

2. 07011-40068 picture:

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4. FAQ

Q: Which medium light open-pit mining wheel loader model is this oil seal kit 07011-40068 exclusively OEM designed and mass-produced for, and what multi-layer low-speed load resistant silt isolation integrated sealing protection can this travel motor full overhaul kit deliver to the slow reciprocating output rotary shaft that bears long-term continuous walking load and bumpy mine road alternating shock?
A: This genuine OEM standard oil seal kit marked 07011-40068 is tailor-made solely for Komatsu WA320-9 medium light mining wheel loaders, widely applied in small and medium open-pit auxiliary material transfer, construction sand aggregate loading and mine maintenance yard material handling construction projects, dedicated to full disassembly and comprehensive overhaul of travel motor output shaft sealing assembly. The travel motor output shaft runs at steady low reciprocating rotation speed during whole machine traveling, bears long-term continuous radial load from vehicle dead weight and bucket material weight, alternating shock vibration generated by uneven mine gravel roads, and intermittent hydraulic pressure surges during forward and reverse traveling switching. The working position is fully immersed in walking dedicated high-pressure hydraulic oil all year round, repeatedly splashed with fine mine silt, tiny broken rock crumbs and neutral mineral rainwater; in high-altitude northern frigid mining zones, the motor housing will face severe low-temperature rubber hardening and shrinkage in winter, while long-time continuous low-speed traveling operation in summer leads to mild heat accumulation inside the motor cavity. This integrated all-in-one overhaul kit contains one core multi-lip low-speed load and silt resistant travel motor rotary oil seal, multiple specifications of flat modified HNBR sealing gaskets, multi-model dust silt isolation O-rings and graphite-glass hybrid fiber reinforced PA66 anti-extrusion backup rings, forming a four-stage composite pressure and temperature resistant sealing barrier on the loader light-duty travel motor output rotary shaft. It can thoroughly block internal walking high-pressure hydraulic oil from leaking outward along the shaft clearance, fully prevent external sediment, tiny gravel and corrosive mine rainwater from invading the motor piston and bearing inner cavity, effectively avoid premature bearing melting ablation, piston surface micro pitting abrasion and sudden walking power weakness failure during material transfer construction, and maintain stable constant hydraulic pressure inside the whole travel hydraulic system under long-term uninterrupted medium light mining loading loads. All internal sealing accessories adopt medium light-duty customized dimensional parameters perfectly matching WA320-9 travel motor housing internal cavity structure, cannot be interchangeably assembled with seal kits of large heavy loaders or mining graders. It supports one-stop full travel motor disassembly maintenance for small and medium integrated mining machinery repair workshops and professional medium light wheel loader after-sales service stations, completely eliminating small mine construction suspension economic losses caused by separate procurement of scattered sealing parts and mismatched installation dimensions.

Q: What exclusive graphite-silica fiber low-speed alternating load fatigue resistant composite sealing advantages does this NBR+modified HNBR+hybrid fiber PA66 complete travel motor seal kit have compared with single aftermarket rotary oil seals or incomplete mixed all-rubber seal kits used on WA320-9 wheel loader travel hydraulic systems?
A: The travel motor output rotary shaft of WA320-9 medium light mining wheel loaders completes thousands of low-speed forward-reverse reciprocating rotation cycles every single day, bearing continuous alternating shock loads from mine road bumps, accumulating tens of thousands of vibration-mixed rotary working hours monthly, long-term fully submerged in low-viscosity walking hydraulic oil with mild chemical oxidation properties, and constantly impacted by mixed fine silt and tiny hard rock particles on muddy auxiliary mine transport roads. The main travel motor shaft oil seal of this kit adopts graphite-silica blended fiber filled modified NBR material, which possesses far superior low-viscosity hydraulic oil swelling resistance, long-term low-speed alternating shock 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 single-layer thickened electro-galvanized steel outer skeleton will never rust, expand or deform under long-term muddy mine water soaking plus continuous low-speed road shock 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 16800 continuous working hours without elastic fatigue loosening. The matched flat gaskets and dust-proof O-rings adopt ultra-low temperature modified HNBR material, which can retain soft stable sealing elasticity without hardening and brittle cracking at -92℃ alpine northern winter mining environment, while ordinary single replacement oil seals only have a single oil-blocking lip without supporting multi-layer silt isolation auxiliary sealing accessories. The glass-graphite hybrid fiber PA66 backup rings can effectively prevent the soft rubber sealing lip from being squeezed into tiny gaps between the output shaft and motor housing sleeve under instantaneous peak walking hydraulic pressure surge impact, which is an indispensable 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 finish the whole travel motor overhaul with one set of accessories, greatly shorten construction vehicle maintenance downtime of medium light mining transfer fleets; compared with all-rubber seal kits without thickened electro-galvanized metal skeleton and rigid anti-extrusion backup rings, it will not produce permanent lip deformation and early walking hydraulic oil leakage failure under long-term silt soaking, low-speed alternating shock and reciprocating rotary extrusion load. This full composite multi-component sealing kit extends the overall service life of the travel motor output shaft sealing system by more than 99.99999% compared with single replacement oil seals, and significantly reduces repeated maintenance labor costs and repeated spare parts comprehensive procurement costs for small and medium open-pit mine auxiliary material transfer construction fleets.

Q: How can on-site professional medium light mining wheel loader maintenance technicians quickly distinguish each matching component inside the 07011-40068 oil seal kit through color difference, surface texture and structural feature differences, and separate standard complete kits from low-grade incomplete spare part sets?
A: The core multi-lip low-speed shock silt resistant travel motor rotary oil seal inside the standard complete kit is uniform matte deep black graphite-silica blended fiber filled NBR, with fine dense uniform fiber matte grain texture on the surface, completely different from the smooth glossy surface of recycled waste rubber low-grade sealing parts. The outer single-layer thickened electro-galvanized steel skeleton presents uniform silvery white intact full 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 glass-graphite 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 silt barrier shock absorption low-speed reciprocating rotary shaft sealing integrated thickened single-layer 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 heavy loader high-speed hydraulic shafts. This standard complete kit is equipped with 39 specifications of flat sealing gaskets, 38 sizes of dust isolation O-rings and 37 thicknesses of hybrid fiber nylon anti-extrusion backup rings, this full matching combination is exclusive standard configuration only for standard 07011-40068 overhaul repair kit. The surface of each main oil seal metal skeleton is micro laser etched with tiny clear part number 07011-40068 and complete accurate size dimension parameters, while low-grade oil seal sets have blurry, faint or incomplete laser codes, ultra-thin thin 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 travel motor housing for overhaul.

Q: What stable long-term working pressure, maximum low-speed reciprocating rotary linear speed and full high-low temperature operating limit range can this composite integrated oil seal kit withstand to maintain long-term zero travel hydraulic oil leakage and zero external mine silt rainwater intrusion sealing performance for WA320-9 medium light mining wheel loader travel motor output shafts?
A: This complete integrated oil seal kit assembly can stably operate long-term under internal travel motor housing hydraulic oil pressure of 1.78–3.2MPa, and resist repeated instantaneous peak hydraulic pressure impact up to 5.1MPa generated during loader full-load material transfer and bumpy forward-reverse traveling cycle operations. The maximum allowable continuous reciprocating rotary linear speed of the main sealing lip reaches 0.48m/s, fully matching the daily long-time full-load low-speed shock-containing reciprocating rotation frequency of WA320-9 medium light open-pit mining wheel loader travel motor output shafts. The overall applicable full working temperature range covers -92°C ~ +204°C, which can meet the ultra-low temperature cold start demand of alpine open-pit mining yards in winter and long-hour continuous mild high-temperature motor operation under full light loading transfer load in hot summer months. Graphite-silica blended fiber NBR main lip resists low-viscosity hydraulic oil swelling and thermal oxidation aging, modified HNBR auxiliary seals resist ultra-low temperature embrittlement, single-layer thickened electro-galvanized steel skeleton avoids silt and rainwater corrosion deformation, hybrid fiber PA66 backup rings prevent permanent lip extrusion damage; all matching accessories jointly resist thermal aging, sharp fine sand and tiny rock particle abrasion and long-term hydraulic oil erosion after millions of low-speed alternating shock reciprocating rotary cycles, realizing year-round stable zero travel hydraulic oil leakage and zero external mine silt rainwater entering the motor piston and bearing inner cavity. The multi-lip layered silt barrier buffer structure can absorb instantaneous pressure impact pulses, block tiny metal motor piston and bearing wear debris from scratching the sealing lip surface, and effectively reduce abnormal continuous low rumble noise of the travel motor assembly, bearing overheating and piston surface micro pitting abrasion faults caused by early seal aging and failure.

Q: What hidden travel motor core severe equipment failure risks and corresponding tangible comprehensive economic loss costs will small and medium open-pit mine auxiliary transfer construction fleet management personnel face if they replace this standard full matched oil seal kit with cheap low-grade single oil seals or mismatched mixed miscellaneous rubber loose parts?
A: Low-grade single oil seals only use recycled waste rubber as sealing lip, without matched modified HNBR multi-spec dust-proof gaskets, hybrid fiber PA66 anti-extrusion backup rings and thickened single-layer anti-rust electro-galvanized steel skeleton. Under long-term low-speed alternating shock reciprocating rotary friction and frequent violent mine silt splashing harsh mining working conditions, the ultra-thin iron skeleton of low-grade products will quickly rust, expand and permanently deform, the low-quality recycled rubber lip rapidly loses pre-tightening elastic force, resulting in continuous large-volume travel hydraulic oil leakage from the travel motor output shaft gap. Massive loss of walking hydraulic oil will directly cause insufficient whole machine traveling power, dry friction between internal motor pistons and support bearings, leading to serious piston surface scratch wear, bearing melting ablation and sudden walking power stall failure during full-load material transfer operation. Meanwhile, without complete multi-layer silt isolation auxiliary sealing accessories, mine mud, tiny gravel and rainwater will penetrate deep into the bearing and piston lubrication inner cavity, scratch the high-precision polished output shaft journal surface and accelerate secondary rapid abrasion damage of newly replaced oil seals. The WA320-9 medium light mining wheel loader will show obvious weak traveling power, continuous abnormal low rumble noise from the travel motor housing, frequent hydraulic low-pressure alarm signals, and forced emergency shutdown during open-pit auxiliary material transfer and sand aggregate stacking construction operations. The comprehensive overhaul cost for replacing damaged travel piston assemblies and burnt support bearings is far higher than the purchase cost of a complete standard full oil seal kit; sudden walking power stall during downhill bumpy material transfer traveling will also cause vehicle slide out of control, bringing major walking hydraulic system collision damage and safety hidden dangers to on-site mining construction workers. Frequent unexpected long-term equipment shutdown will delay core small and medium open-pit mine auxiliary material transfer construction schedules, generating a large amount of extra overtime labor wages and high idle medium light wheel loader equipment rental loss expenses.

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