Highlight:
Heavy-Duty NBR-Steel Piston Ring Seal
, CAT D10 D11 Piston Seal Ring
, D11R D11T Equalizer Bar Seal
1. Quick Details of seal 8P-8797:
| Part NO. |
8P-8797 |
| Machine |
Crawler Tractor |
| Size |
OEM |
| Material |
High‑tensile Steel Core |
| Oil seal type |
rubber and steel
|
2. 8P-8797 parts on group :
| NO. |
PART NO. |
PRAT NAME |
QTY |
| 1 |
6T-9238 |
BUSHING-SPHERICAL |
4 |
| 2 |
8P-8796 |
SEAL AS |
1 |
| 3 |
6Y-3551 |
BEARING |
1 |
| 4 |
8P-8797 |
SEAL AS |
1 |
| 5 |
5P-7151 |
RING-RETAINING |
4 |
| 6 |
7T-1448 |
SEAL |
4 |
| 7 |
3T-7791 |
BUSHING-SPHERICAL |
2 |
3. 8P-8797 picture:
4. Service part number :
| PART NO. |
PART NO. |
Part NO. |
| 5P5874 |
2033940 |
8M4390 |
| 3403402 |
4L9564 |
9X4611 |
| 3F1547 |
5P6718 |
2256948 |
| 915024 |
6V3835 |
1J2150 |
| 3D2824 |
8T6444 |
1142687 |
| 3J1907 |
8M5254 |
1173036 |
| 3821152 |
5P6393 |
6V6228 |
| 6E1572 |
6V1196 |
5J2974 |
| 2H3934 |
6V5759 |
1362967 |
| 3D-8422 |
095-1587 |
6V3251 |
| 6V-1196 |
095-1603 |
6J2419 |
| 161-9835 |
5P5874 |
3511768 |
5. FAQ
Q: Is 8P‑8797 a single piece or a kit? What is included, and is it a direct OEM replacement?
A: It is a single, integrated piston ring seal—not a multi‑piece kit Parts Store. The steel core and NBR rubber are permanently bonded during manufacturing into one solid unit. No extra gaskets, backup rings, or installation tools are required. It is a direct OEM replacement for CAT part 8P‑8797, matching exact dimensions and performance specifications for the D10/D11 equalizer bar joint—no modifications needed.
Q: What common problems arise if a low‑quality aftermarket seal is used in this critical position?
A: Cheap alternatives use low‑grade rubber that hardens, cracks, or swells quickly, and thin, low‑quality steel that bends or deforms under load. They often fail within 500–1,000 hours, causing grease leakage. This leads to stiff steering, uneven track tension, increased undercarriage friction, and accelerated wear on the equalizer bar, pins, and bushings. In severe cases, the joint seizes, requiring costly repairs, downtime, and even replacement of the entire equalizer bar assembly.
Q: What is the typical service life of this genuine‑quality seal under real‑world jobsite conditions?
A: With proper maintenance (regular greasing and inspections), the 8P‑8797 delivers 5,000–7,000 working hours of reliable service—2–3 times longer than generic rubber seals Parts Store. The high‑quality NBR resists oil degradation and aging, while the steel core prevents distortion. It maintains consistent sealing performance for years in tough environments, reducing maintenance frequency and minimizing costly downtime.
Q: Which lubricants are compatible with this seal, and which types should be avoided to prevent damage?
A: It is fully compatible with CAT NLGI 2 multipurpose lithium grease and extreme‑pressure(EP)greases formulated for heavy‑duty undercarriages. These greases provide optimal lubrication and do not react with the NBR rubber. Avoid synthetic greases, greases with molybdenum disulfide, vegetable‑based lubricants, or highly acidic greases—these can cause NBR swelling, softening, or premature degradation, leading to seal failure.
Q: Why is this seal considered a disposable part and cannot be reused after removal?
A: The 8P‑8797 is a precision, single‑use component. Once pressed out of the groove, the NBR rubber undergoes permanent compression set—it cannot regain its original elasticity and shape. The steel ring may also develop micro‑bends, scratches, or surface damage during removal. Reusing a removed seal guarantees leakage and premature failure within a short time. Always install a new seal to ensure reliable performance.
6. Exhibition and Wearhous
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