423-15-05121 4231505121 Complete Gasket Kit for Grader Drive and Hydraulic System Maintenance WA350-1 WA380-1

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5. FAQ

Q: Which motor grader models does this gasket kit fit, and what key assemblies does it serve for maintenance?
A: This full-service gasket kit is tailored for Komatsu motor graders, perfectly fitting GD500, GD550, GD600 and their various upgraded configurations. It is applied to the main drive gear assembly, hydraulic power unit, differential housing and connecting pipeline flanges of the grader. As a full maintenance set, it covers all static sealing parts required for major overhauls and routine repairs. Whether for daily road leveling, slope trimming or long-term highway maintenance projects, it can maintain stable sealing performance for the whole equipment. Meanwhile, it is also compatible with most same-class motor graders in the market, bringing great flexibility for equipment maintenance workshops and construction teams.

Q: What are the functional advantages of different materials used in this gasket kit when working on a grader?
A: Motor graders work outdoors all year round, facing frequent vibration, oil immersion and temperature changes, so each material is professionally selected. The high-density fiber composite gaskets feature excellent compression recovery and anti-fatigue performance. They will not deform or crack under long-term bolt compression and mechanical vibration, and keep tight sealing when contacting with gear oil and hydraulic fluid. Modified NBR rubber seals have outstanding oil resistance and flexibility, adapting to the tiny displacement of connecting parts and effectively blocking oil leakage at shaft holes and small joints. Cold rolled steel gaskets act as structural reinforcement, fixing assembly gaps and preventing flange distortion. FKM rubber parts are arranged near heat-generating components to resist high temperature and chemical erosion, extending the overall service cycle of the kit.

Q: Please describe the appearance, color and structural features of all parts inside the kit. Are there different functional versions available?
A: All components have distinct appearances for easy identification during installation. The large fiber composite gaskets are light grey, with dense texture and precisely punched mounting holes, smooth edges without burrs or defects. All NBR rubber O-rings and sealing rings are pure black with uniform roundness and consistent thickness. The cold rolled steel gaskets present metallic silver, with flat surface and standard hole positions. The FKM heat-resistant seals are tawny, easy to distinguish from ordinary rubber parts. We provide two mainstream versions: standard version for general plain and hilly construction areas, and enhanced dustproof version for dry, windy and sandy areas. All optional versions adopt unified installation dimensions and need no modification on original equipment.

Q: What is the working temperature range, pressure resistance and actual service life of this gasket kit in different working scenarios?
A: This gasket kit is designed to adapt to complex outdoor construction climates. Its effective working temperature ranges from -22°C to 132°C. It will not become brittle and leak oil in low-temperature environments, nor soften and lose sealing effect after continuous high-temperature operation. The maximum withstand pressure reaches 24MPa, fully meeting the working pressure demand of grader drive and hydraulic systems. Under conventional medium-load road construction, the overall service life can reach 4000 to 6000 working hours. When working under full load for a long time or in dry and dusty mining areas, the service life is about 2400 to 3400 working hours. Compared with ordinary low-grade gaskets, its comprehensive stability and durability are greatly improved.

Q: Does this gasket kit match original factory parts? What core points should be noted during disassembly and replacement?
A: This product is manufactured strictly in accordance with OEM size standards and process requirements. All specifications, thickness and hole positions are completely consistent with original parts, supporting direct replacement without cutting or trimming. It is compatible with both old and new models of matching graders. During replacement, first thoroughly clean all flange joint surfaces to completely remove residual old gasket fragments, oil dirt and sand grains, because tiny impurities will directly cause poor sealing and oil leakage. When placing new gaskets, keep them flat without tilting, folding or dislocation. When tightening fixing bolts, adopt diagonal progressive tightening method to ensure uniform stress on the whole gasket, and avoid excessive local force which will crush and damage the gaskets.

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