Sierra Oil Seal 18-0525, Replaces 26-45587, 0.390 x 0.628 x 0.124 Inch

The Sierra 18-0525 is a precision oil seal sized for a 0.390 inch shaft, with a 0.628 inch outside diameter and a 0.124 inch width. It is a direct replacement for OEM number 26-45587 and features a machined exterior finish for a consistent, leak-resistant fit at the shaft bore.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-0525
• OEM Cross Reference: 26-45587
• Shaft Size: 0.390 inches
• Outside Diameter: 0.628 inches
• Width: 0.124 inches
• Finish: Machined
• Weight: 0.01 pounds
• UPC: 030999874368

Fitment

Designed as a dimensional and functional match for applications originally fitted with OEM part 26-45587. Confirm your existing seal or housing calls for 26-45587 before ordering.

Replaces (OEM)

• 26-45587

Frequently Asked Questions

What OEM part does the Sierra 18-0525 replace? It is a direct replacement for OEM number 26-45587, so any application calling for that part number accepts the Sierra 18-0525 oil seal.

What is the shaft size for this seal? 0.390 inches is the shaft size for the Sierra 18-0525 oil seal.

What are the outside diameter and width of the 18-0525 seal? The Sierra 18-0525 has a 0.628 inch outside diameter and a 0.124 inch width.

How much does the 18-0525 oil seal weigh? It weighs 0.01 pounds, consistent with its small, compact seal size.

Is the 18-0525 seal genuine Sierra or aftermarket? Yes, the 18-0525 is a genuine Sierra-branded part, manufactured as a direct-fit equivalent to OEM 26-45587.

What finish does the Sierra 18-0525 have? It has a machined exterior finish for consistent, accurate sealing at the shaft bore.

Can I use the 18-0525 in place of 26-45587 without modification? Yes, the Sierra 18-0525 is dimensionally matched to OEM 26-45587 and installs as a direct swap.

What is included when I order the 18-0525? You receive one Sierra 18-0525 oil seal sized to 0.390 inch shaft, 0.628 inch OD, and 0.124 inch width.

Does the part number 18-0525 identify the shaft size or the OEM equivalent? 18-0525 is the Sierra part number itself; 26-45587 is the OEM number it replaces.

Is this seal suitable for both port and starboard applications? No side-specific designation is given for the 18-0525; it is a standard oil seal sized by shaft diameter, OD, and width rather than by mounting side.