07011-40038 0701140038 Full Steering Pump Shaft Oil Seal Kit OEM Genuine Replacement Spare Parts for WA380-8 Mining Wheel Loader Steering Hydraulic Pump Full Overhaul

1. Quick Details of  seal 07011-40038:

2. 07011-40038  picture:

3. Service part number :

4. FAQ

Q: Which medium open-pit mining wheel loader model is this oil seal kit 07011-40038 exclusively OEM designed and mass-produced for, and what multi-layer hydraulic surge resistant dust isolation integrated sealing protection can this steering pump full overhaul kit deliver to the short-stroke reciprocating drive shaft that bears frequent steering hydraulic pressure fluctuations and continuous engine vibration?
A: This genuine OEM standard oil seal kit marked 07011-40038 is tailor-made solely for Komatsu WA380-8 medium mining wheel loaders, widely deployed in medium open-pit ore loading, aggregate stockyard stacking and mine transit yard material transfer construction projects, dedicated to full disassembly and comprehensive overhaul of steering pump drive shaft sealing assembly. The steering pump drive shaft performs short reciprocating rotary strokes during steering operation, bears frequent instantaneous hydraulic surges when operators turn left and right, continuous low-frequency vibration transmitted from the engine and walking system, and intermittent shock loads during bumpy mine road traveling. The working area is fully immersed in dedicated steering hydraulic oil all year round, repeatedly splashed with fine mine silt, sharp crushed stone debris and neutral mineral rainwater; in high-altitude northern frigid mining zones, the pump housing will face severe low-temperature rubber hardening in winter, while long-time continuous frequent steering operation in summer leads to sustained heat accumulation inside the pump cavity. This integrated all-in-one overhaul kit contains one core multi-lip hydraulic surge resistant steering pump rotary oil seal, multiple specifications of flat modified HNBR sealing gaskets, multi-model dust barrier O-rings and silica-aramid hybrid fiber reinforced PA66 anti-extrusion backup rings, forming a four-stage composite pressure and temperature resistant sealing barrier on the loader heavy-duty steering pump drive shaft. It can thoroughly block internal high-pressure steering hydraulic oil from leaking outward along the shaft clearance, fully prevent external sediment, gravel and corrosive mine rainwater from invading the pump piston and bearing inner cavity, effectively avoid premature bearing melting ablation, piston surface pitting abrasion and sudden steering response failure during loading construction, and maintain stable constant hydraulic pressure inside the whole steering hydraulic system under long-term uninterrupted medium mining loading loads. All internal sealing accessories adopt medium-duty customized dimensional parameters perfectly matched with WA380-8 steering pump housing internal cavity structure, cannot be interchangeably assembled with seal kits of small loaders or mining graders. It supports one-stop full steering pump disassembly maintenance for medium integrated mining machinery repair workshops and professional medium mining wheel loader after-sales service stations, completely eliminating medium mine construction suspension economic losses caused by separate procurement of scattered sealing parts and mismatched installation dimensions.

Q: What exclusive silica-aramid fiber anti-hydraulic surge short-stroke reciprocating composite sealing advantages does this NBR+modified HNBR+hybrid fiber PA66 complete steering pump seal kit have compared with single aftermarket rotary oil seals or incomplete mixed all-rubber seal kits used on WA380-8 wheel loader steering hydraulic systems?
A: The steering pump drive rotary shaft of WA380-8 medium mining wheel loaders completes thousands of short-stroke reciprocating rotation cycles every single day, bearing frequent hydraulic pressure surges triggered by steering actions, accumulating tens of thousands of vibration-mixed working hours monthly, long-term fully submerged in chemically active high-pressure steering hydraulic oil, and constantly impacted by mixed silt and sharp hard stone particles on muddy open-pit loading terrain. The main steering pump shaft oil seal of this kit adopts silica-aramid blended fiber filled modified NBR material, which possesses far superior steering hydraulic oil swelling resistance, long-term surge 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 electro-galvanized thick steel outer skeleton will never rust, expand or deform under long-term muddy mine water soaking plus continuous steering surge 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 16000 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 -86℃ alpine northern winter mining environment, while ordinary single replacement oil seals only have a single oil-blocking lip without supporting multi-layer dust isolation auxiliary sealing accessories. The glass-silica hybrid fiber PA66 backup rings can effectively prevent the soft rubber sealing lip from being squeezed into tiny gaps between the drive shaft and pump housing sleeve under instantaneous peak steering 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 steering pump overhaul with one set of accessories, greatly shorten construction vehicle maintenance downtime of medium mining loading 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 steering hydraulic oil leakage failure under long-term hydraulic surge, vibration and short-stroke reciprocating extrusion load. This full composite multi-component sealing kit extends the overall service life of the steering pump shaft sealing system by more than 99.99996% 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 ore loading construction fleets.

Q: How can on-site professional medium mining wheel loader maintenance technicians quickly distinguish each matching component inside the 07011-40038 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 hydraulic surge resistant steering pump rotary oil seal inside the standard complete kit is uniform matte deep black silica-aramid 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 double-layer 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-silica 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 pressure buffer dust-proof short-stroke rotary 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 loader auxiliary hydraulic pump shafts. This standard complete kit is equipped with 36 specifications of flat sealing gaskets, 35 sizes of dust isolation O-rings and 34 thicknesses of hybrid fiber nylon anti-extrusion backup rings, this full matching combination is exclusive standard configuration only for standard 07011-40038 overhaul repair kit. The surface of each main oil seal metal skeleton is micro laser etched with tiny clear part number 07011-40038 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 steering pump housing for overhaul.

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