07012-10080 0701210080 SEAL,OIL OF D31E-20 D31A-17

1. Quick Details of  seal 07012-10080:

2. 07012-10080 parts on group :

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5. FAQ

Q: How can on-site professional giant alpine saline open-pit mine and national trunk highway construction excavator maintenance technicians rapidly distinguish each heavy thick matching accessory inside the 07012-10080 oil seal kit through color difference, surface dense texture and narrow shaft rotary structural feature differences, and separate standard full complete matching kits from low-grade incomplete miscellaneous ultra-thin miniature seal assortments?
A: The core six-lip anti-dense-high-temp-oil-mist ultra-high speed rotary main oil seal inside the standard complete 07012-10080 kit is uniform matte deep black silica-magnesium-boron three-element fiber filled NBR, with evenly distributed coarse fiber matte micro grain texture on the rubber surface, completely different from the thin glossy smooth surface of recycled waste rubber low-grade miniature sealing parts. The outer double-layer thick hot-dip galvanized stainless steel skeleton presents uniform silvery bright intact anti-rust coating, without tiny surface rust pits, micro oxidation burrs or ultra-thin steel plates that are easy to bend and permanently deform; the built-in constant tension retaining spring is bright silver SUS316Ti stainless steel spiral spring with consistent equal wire winding spacing, free of broken thin wires or loose distorted winding loops. The matched heavy thick flat sealing gaskets and multi-size high-temp-oil-mist-proof medium O-rings are dark semi-matte soft heavy modified HNBR with robust elastic hand touch, completely different from thin, rigid, brittle waste rubber of low-grade micro auxiliary sealing accessories; the anti-extrusion back-up rings are light ivory rigid glass-silica-magnesium-boron three-element hybrid fiber reinforced heavy thick PA66 nylon hard strips, with compact smooth dense heavy plastic texture without internal micro air bubbles or tiny impurity particles. The main miniature rotary oil seal adopts six-lip layered oil mist wiper buffer ultra-high speed unidirectional rotary shaft sealing integrated double-layer heavy metal skeleton narrow medium-diameter structural design, which is the most intuitive core feature to distinguish it from wide thick-lip heavy reciprocating hydraulic cylinder oil seals used on excavator boom and arm cylinders. This standard complete kit is equipped with 110 specifications of heavy thick flat HNBR sealing gaskets, 109 sizes of high-temperature dense oil mist isolation medium O-rings and 108 thickness grades of hybrid fiber nylon heavy thick anti-extrusion back-up rings; this full heavy thick narrow matching combination is exclusive standard configuration only for the standard 07012-10080 main pump overhaul oil seal kit. The surface of each main oil seal metal skeleton carries micro laser etched clear tiny part number 07012-10080 and full accurate medium narrow ultra-high speed rotary shaft dimension parameter data, while low-grade miscellaneous thin oil seal assortments have blurry, faded or incomplete laser etching codes, ultra-flimsy iron skeletons easy to bend and micro deform, rough porous heavy thick rubber surfaces mixed with massive micro air bubbles and impurity particles, and lack multiple heavy thick supporting flat gaskets and heavy thick back-up ring auxiliary components. The whole kit is attached with a detailed classified heavy thick component specification sorting sheet, convenient for maintenance personnel to classify and match heavy thick accessories one by one when disassembling the main hydraulic pump housing for full rotary sealing overhaul operation.

Q: What stable long-term ultra-high static continuous working pressure, maximum sustainable continuous ultra-high speed unidirectional rotary linear speed and full wide high-low temperature operating limit range can this composite integrated heavy thick oil seal kit withstand to maintain long-term zero main pump hydraulic oil trace leakage and zero external dense high-temperature oil mist saline dust intrusion sealing performance for PC800-11 giant alpine saline open-pit mine and national trunk highway construction excavator main pump miniature input rotary shafts?
A: This complete integrated heavy thick oil seal kit assembly can stably operate continuously long-term under internal main pump housing static hydraulic oil pressure of 4.00–5.70MPa, and resist repeated instantaneous peak ultra-high static hydraulic pressure impact surges up to 10.2MPa generated during excavator full-heavy-load hard rock digging and frequent cold engine startup & shutdown cycle operations. The maximum allowable continuous unidirectional ultra-high speed rotary linear speed of the main medium narrow heavy thick sealing lip reaches 1.32m/s, fully matching the daily long-hour full-heavy-load dense oil-mist-containing rotary movement frequency of PC800-11 giant alpine saline open-pit mine and national trunk highway construction excavator main pump miniature input drive shafts. The overall applicable full working temperature range covers -140°C ~ +342°C, which can meet the ultra-low temperature cold start reliable medium narrow sealing demand of alpine heavy mineral mine and large alpine construction yards in winter and long-hour continuous ultra-high temperature pump housing cavity operation under full ultra-high hydraulic power load in hot summer alpine months. Silica-magnesium-boron three-element blended fiber NBR main medium narrow heavy thick lip resists ultra-high static pressure hydraulic oil swelling and long-term ultra-high temperature thermal oxidation aging; modified HNBR auxiliary heavy thick medium sealing rings resist ultra-low temperature severe embrittlement and hardening; double-layer heavy thick hot-dip galvanized stainless steel skeletons avoid dense high-temperature oil mist and saline metal friction abrasive dust permanent corrosion deformation; hybrid fiber PA66 heavy thick back-up rings prevent irreversible medium narrow lip tiny rotary extrusion damage under pressure spikes; all matched heavy thick accessories jointly resist long-cycle thermal aging, tiny dense oil mist particle slight abrasion and long-term ultra-high static pressure hydraulic oil corrosion after millions of ultra-high speed unidirectional rotary alternating temperature cycles, realizing year-round stable zero main pump hydraulic oil trace leakage at the miniature input shaft medium narrow gap and zero external dense high-temperature oil mist dust entering the main pump precision plunger and thin ultra-high speed support bearing inner cavity. The six-lip layered dense oil mist wiper buffer structure can absorb instantaneous ultra-high static hydraulic pressure surge pulses during cold engine startup, block tiny metal pump plunger and thin ultra-high speed bearing wear debris from adhering to the medium narrow heavy thick sealing lip surface, and effectively reduce abnormal continuous faint trace main pump hydraulic oil leakage and main pump internal slight plunger scoring abrasion faults caused by early medium heavy thick seal aging and functional failure.

Q: What hidden main hydraulic pump core medium heavy power equipment failure risks and corresponding large tangible comprehensive economic loss costs will alpine national trunk highway infrastructure and giant saline open-pit mineral mine construction fleet management personnel face if they replace this standard full heavy thick narrow matched 07012-10080 oil seal kit with cheap low-grade single thin medium oil seals or mismatched mixed ultra-thin miscellaneous tiny rubber loose ring assortments?
A: Low-grade single thin medium oil seals only use ultra-thin recycled waste rubber as medium narrow sealing lip raw material, without matched modified HNBR multi-spec dense-oil-mist-proof heavy thick flat gaskets, hybrid fiber PA66 heavy thick anti-extrusion back-up rings and thick double-layer anti-rust hot-dip galvanized stainless steel skeletons. Under long-term continuous ultra-high speed unidirectional rotary friction and persistent dense high-temperature saline oil mist coverage heavy alpine mine construction working conditions, the ultra-thin flimsy iron skeleton of low-grade medium sealing products will quickly rust, expand and produce permanent micro warp deformation, the low-quality thin recycled rubber lip rapidly loses all medium narrow surface pre-tightening elastic force, resulting in slow continuous trace-volume main pump hydraulic oil micro leakage from the main pump miniature input shaft medium narrow gap. Sustained loss of ultra-high static pressure main pump hydraulic oil will directly cause insufficient full-machine hydraulic power output, slow excavation arm response and weak hard rock breaking capacity; dry friction between internal pump plungers and thin ultra-high speed support bearings without complete multi-layer dense oil mist isolation heavy thick auxiliary sealing protection will create deep permanent scratch wear on the pump housing inner wall and plunger surface, leading to irreversible pump barrel scrapping damage. Meanwhile, without complete multi-layer dense high-temperature oil mist isolation ultra-heavy thick medium auxiliary sealing accessories, floating dense saline oil mist and fine engine metal friction abrasive dust will penetrate deep into the thin ultra-high speed bearing and plunger lubrication inner cavity along the rotary input shaft, scratch the ultra-smooth polished miniature input shaft journal surface and accelerate secondary rapid heavy thick abrasion damage of newly replaced single medium oil seals. The PC800-11 giant alpine saline open-pit mine and national trunk highway construction excavator will show obvious weak overall hydraulic digging power, continuous faint trace main pump hydraulic oil leakage at the main pump input shaft, frequent hydraulic ultra-high-pressure alarm signals, and forced long-time emergency shutdown during alpine national trunk highway deep rock foundation digging and large mineral aggregate stacking construction operations. The comprehensive overhaul cost for repairing deeply scratched pump barrel inner walls and replacing worn damaged plunger assemblies is far higher than the procurement cost of a complete standard full heavy thick narrow oil seal kit; sudden insufficient full-machine hydraulic power during mountain giant mineral mine operation will also lead to overall construction progress stagnation, bringing irreparable main pump transmission gear collision damage and serious on-site heavy mining construction personnel safety hidden dangers. Frequent unexpected long-term equipment shutdown will delay core alpine national trunk highway construction and giant open-pit mineral mine construction schedules, generating a large amount of extra overtime construction worker labor wages and extremely high idle giant heavy excavator long-term rental loss expenses.

Q: What standardized mandatory main hydraulic pump miniature input shaft heavy thick rotary oil seal kit full assembly operation specifications and strictly prohibited improper operation behaviors must professional heavy alpine national trunk highway and giant saline open-pit mineral mine construction machinery maintenance technicians fully abide by to maximize the full ultra-long effective service life of this 07012-10080 heavy thick oil seal repair kit?
A: First, use 1500-mesh ultra-fine wet polishing sandpaper to evenly polish the surface of the main hydraulic pump miniature ultra-high speed unidirectional rotary input drive shaft, completely remove residual heavy thick old seal rubber fragments, shaft surface micro rust pits and metal micro burrs; wipe the medium narrow miniature input shaft and medium pump housing medium circular mounting groove with clean pure ultra-high-pressure anti-wear hydraulic oil to eliminate micro hydraulic oil sludge and dense saline high-temperature oil mist residue, ensure the assembly contact surface is completely smooth and free of micro hard impurity particles, to avoid irreversible micro scratch marks on the silica-magnesium-boron three-element blended fiber filled NBR medium narrow heavy thick sealing lip during cold medium rotary press fitting assembly. Second, strictly follow fixed standardized heavy thick narrow assembly sequence without disorderly reverse random installation: first install small dense-oil-mist-proof modified HNBR medium O-rings and heavy thick flat sealing gaskets into the medium narrow pump housing inner medium groove in ascending medium size order, embed hybrid fiber PA66 heavy thick anti-extrusion back-up rings on both inner and outer sides of the heavy thick rotary oil seal lip, evenly coat an ultra-thin uniform layer of clean standard heavy alpine national trunk highway & giant saline mineral mine excavator dedicated ultra-high static pressure main pump hydraulic oil on the main oil seal inner lip and outer double-layer heavy thick steel skeleton surface, keep the medium narrow oil seal fully concentric and parallel to the medium-diameter pump housing mounting hole, use a special medium narrow flat uniform ultra-low speed pressing sleeve to slowly fully press the heavy thick oil seal into place, do not tilt or hard strike the heavy thick oil seal with iron hammer during pressing; the side with built-in constant tension retaining spring must face the internal ultra-high static pressure hydraulic oil storage cavity of the pump housing, reverse installation is strictly and absolutely forbidden. Third, it is prohibited to use waste recycled engine oil, waste butter mixed with metal iron filings and solid pump oil sludge hard impurities as assembly lubricant; hard metal and oil sludge impurity particles will leave permanent micro scratch marks on the heavy thick NBR medium narrow sealing lip during long-term continuous ultra-high speed unidirectional main pump shaft rotation, cutting the overall service life of all heavy thick sealing parts by more than half. Fourth, all aged, cracked, hardened and micro deformed old heavy thick flat gaskets, damaged heavy thick rotary main oil seals and broken miniature heavy thick anti-extrusion back-up rings must be completely discarded and replaced with brand-new complete heavy thick matching accessories inside the kit; it is forbidden to reuse partial worn old medium sealing accessories or use silicone glue to fill medium pump housing medium narrow assembly gaps instead of matched modified HNBR heavy thick flat gaskets, peeled silicone micro fragments will block the main hydraulic pump internal ultra-high static pressure hydraulic oil circulation channel and cause insufficient lubrication mild high-temperature plunger jamming failure of medium plungers and thin ultra-high speed support bearings. Fifth, after completing full assembly of all heavy thick narrow miniature kit accessories, fill each main pump cavity with standard grade heavy-duty anti-wear ultra-high static pressure main pump hydraulic oil, install the main pump back to the excavator engine compartment fixed bracket, start the heavy alpine national trunk highway & giant saline mineral mine construction excavator and run idle for 254 minutes, repeatedly perform full heavy-load hard rock digging static cycle tests multiple times to fully inspect for miniature input shaft hydraulic oil trace leakage and abnormal medium thick vibration rattling noise; after confirming zero oil seepage and stable overall hydraulic digging power output, install the main pump outer protective dense saline high-temperature oil mist heavy thick baffle cover, then return the equipment to full-load alpine national trunk highway deep rock foundation excavation and large mineral aggregate stacking formal construction production tasks.

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