423-15-05120 4231505120 Complete Gasket Kit for Grader Transmission and Hydraulic System Repair WA350-1 WA380-1

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5. FAQ

Q: What kind of grader models does this gasket kit fit, and which main parts does it cover?
A: This gasket kit is designed for Komatsu motor graders, mainly fitting GD500, GD550, GD600 and related variants. It serves the transmission housing, hydraulic pump, differential assembly, and connecting flanges. It’s a full set for major overhaul and daily repair, covering all static seals needed. Whether for road leveling, slope work, or long-term highway projects, it ensures reliable sealing. It also fits most same-class graders, making it flexible for workshops and construction teams.

Q: Why are these materials chosen, and what are their working advantages on a grader?
A: Graders work outdoors year-round with heavy vibration, oil contact, and temperature changes, so materials are carefully selected. Non-asbestos fiber gaskets have strong compression recovery and anti-fatigue properties—they won’t deform or crack under long bolt pressure and vibration, and seal well with gear oil and hydraulic fluid. NBR rubber seals offer great oil resistance and flexibility, adapting to small part movements and stopping leaks at shafts and joints. Zinc-coated steel shims add rigidity, keeping assembly gaps steady and preventing flange bending. FKM parts go near hot components, resisting high heat and chemicals to extend kit life.

Q: Can you describe the color, look, and structure of each part in the kit? Are there different versions?
A: All parts have clear features for easy installation. Large fiber gaskets are light gray, dense, with precise holes and smooth edges. NBR O-rings and seals are solid black, with even thickness and round shape. Zinc-coated steel shims are bright silver, flat, with standard holes. FKM heat-resistant seals are amber, easy to tell apart. We have two versions: standard for regular plain/hilly areas, and heavy-duty dustproof for dry, windy, sandy sites. Both have the same install size—no equipment changes needed.

Q: What temperature range, pressure, and service life can this gasket kit handle in different jobs?
A: It’s built for tough outdoor climates. Working temperature: -25°C to 130°C—no cold brittleness or hot softening. Max pressure: 25MPa, enough for grader transmission and hydraulic systems. Medium-load road work: 3800–5800 hours life. Full-load or dusty mining areas: 2200–3200 hours. It’s much more stable and durable than cheap gaskets.

Q: Does it match OEM parts? What should I watch for when replacing?
A: Made to OEM specs—size, thickness, holes all match original parts. Direct replacement, no cutting. Fits old and new grader models. When replacing: clean all flanges thoroughly to remove old gasket bits, oil, and sand—tiny dirt causes leaks. Lay new gaskets flat, no tilting or folding. Tighten bolts diagonally and gradually for even pressure—over-tightening crushes gaskets.

Q: What problems happen if I use low-quality gaskets instead?
A: Cheap gaskets use bad materials and rough processes—they can’t handle grader vibration and pressure. They age, deform, and crack quickly, causing gear oil and hydraulic fluid leaks. Leaks raise running costs and pollute sites. Dust and dirt get into gearboxes and hydraulics, scratching gears, bearings, and valves. Fixing damaged parts costs far more than good gaskets, and downtime delays construction.

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