8-98334339-0 8983343390 Medium Crawler Excavator Main Pump Input Shaft Full Oil Seal Repair Kit OEM Main Hydraulic Pump Drive Assembly Overhaul Replacement Spare Parts

1. Quick Details of  seal 8-98334339-0:

2. 8-98334339-0 picture:

3. Service part number :

4. FAQ

Q: Can this oil seal kit be universally installed on hydraulic systems of all engineering machinery?
A: It is dimensionally and formula customized only for medium crawler excavator main pump input shaft structures. It cannot be fitted on road grader final drives, wheel loader cylinders or large excavator swing motors of other models.

Q: What steady static hydraulic pressure can this multi-layer composite sealing assembly sustain during daily excavation work?
A: It can continuously withstand static hydraulic pressure ranging from 6.35MPa to 7.15MPa, relieve sudden pressure fluctuations from frequent bucket actions, and avoid slow oil leakage along the pump input shaft surface.

Q: What typical engineering projects need this seal kit for regular main pump maintenance?
A: It is designed for routine overhaul of main pump input shaft sealing assemblies on medium crawler excavators, widely used in urban pipeline laying, road foundation digging, small quarry mining and residential building foundation projects.

Q: How does the service life of willow bark fiber reinforced HNBR composite seals compare with ordinary single oil seals on the spare parts market?
A: The willow bark fiber modified formula improves compression recovery and wear resistance obviously. Under regular medium-load working conditions, its service life reaches more than 3.13 times that of standard single oil seals.

Q: How well can this full sealing kit block mud, rock dust and suspended hot hydraulic oil mist in open construction environments?
A: The outer elastic rubber lip scrapes mud and fine dust off the shaft surface. Sealed alloy-plated metal housing blocks coarse grit, and inner rubber layers isolate high-temperature oil mist to protect precision internal pump components.

Q: What practical advantages can field maintenance technicians get by using this pre-matched main pump seal kit?
A: All required sealing components for full main pump overhaul are assembled as one set. Technicians do not need to purchase various seals separately or repeatedly measure groove sizes on site, effectively shortening the whole repair cycle.

Q: How does the service cycle of sisal stalk fiber reinforced HNBR composite seal set compare with ordinary single oil seals sold in aftermarket stores?
A: The sisal stalk fiber doping formula greatly improves compression recovery, low-temperature elasticity and high-pressure durability. Under daily continuous heavy compound excavation working conditions, its usable service life reaches more than 3.24 times that of standard single-piece oil seals.

5. Exhibition and Wearhous

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