17M-15-49280 17M1549280 Engineering Machinery Parts D155A-6 D275A-5R

1. Quick Details of  seal 17M-15-49280:

2. 17M-15-49280 parts on group :

3. 17M-15-49280  picture:

4. Service part number :

5. FAQ

Q: why the copper ring is Buckle opening ?

A: This ring you are looking at is a hook-joint seal ring (often referred to in parts manuals as a metal sealing ring). In heavy equipment transmissions, these serve as dynamic oil-delivery seals on rotating shafts—and that interlocking "buckle" opening is a clever bit of engineering designed to solve 3 major mechanical challenges.

1. It Allows Assembly Without Stretching the Metal,Unlike an elastic rubber O-ring, a solid copper, brass, or cast-iron ring cannot stretch.To install it, you have to slide it over the transmission shaft and drop it into a deep, machined groove.The buckle opening allows you to carefully unhook the joint, expand the ring just enough to pass over the diameter of the shaft, and snap it securely into the groove without permanently bending, warping, or snapping the metal.
2. It Acts Like a "Piston Ring" to Block High-Pressure Oil.These rings act as a rotary union, sealing the high-pressure oil moving from the stationary transmission housing into the oil passages inside the spinning shaft to engage the clutch packs.Once inside the bore, the ring expands outward against the wall of the housing.A simple diagonal cut or straight gap would allow a massive amount of pressurized oil to bleed right through the opening.The interlocking buckle design forces the two ends to overlap mechanically. This creates a labyrinth path that effectively traps and blocks the oil, minimizing pressure drops so your clutches switch gears quickly and firmly.
3. It Compensates for Heat Expansion:Transmissions get incredibly hot under load. When the copper/metal heats up, it expands in circumference.

Q: Why is bronze used for this piston seal ring?

A: Bronze offers excellent wear resistance, high load-bearing capacity, and natural lubricity against steel cylinder bores. It also has good thermal conductivity, reducing heat buildup during operation, and is resistant to corrosion from hydraulic fluids. This makes it ideal for heavy-duty, high-pressure applications.

Q: How do I install this bronze piston seal ring correctly?

A: Gently expand the split ring (do not overstretch or deform it) and carefully seat it into the piston groove. If installing multiple rings, stagger their split gaps by 120° to prevent fluid bypass. Use a tapered installation sleeve when inserting the piston into the cylinder to avoid damaging the ring edges or the bore.

Q: How do I install this piston seal ring correctly?

A: Expand the split ring carefully by hand or with a proper ring expander to avoid overstretching, slide it into the piston groove, ensure it sits flat without twisting, then stagger the ring gaps if multiple rings are used before assembling the piston into the cylinder.

6. Exhibition and Wearhous

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