7X-2698 7X2698 Cylinder Seal Repair Kit for CAT Wheel Loader Series 962G II 950F II

1. Quick Details of  seal 7X-2698:

2.  7X-2698 picture:

3. Service part number :

4. FAQ

Q: What four different raw materials compose all sealing accessories inside this repair kit?
A: This kit is assembled with four core materials including PU, bronze-filled PTFE, regular NBR rubber and oil-impregnated wear-resistant fabric ring.

Q: Could you introduce the original natural color of each material seal component?
A: PU main seals present milky creamy white; bronze-filled PTFE backup rings show unique bronze grey; all NBR O-rings and small rubber seals are solid black; impregnated fabric wear guides are tawny reddish brown without artificial pigment addition.

Q: What core sealing function does PU material undertake in the hydraulic tilt cylinder?
A: As the primary dynamic sealing component, PU relies on outstanding elasticity to block hydraulic oil leakage during frequent high-load piston reciprocating movement when loader lifts or dumps materials.

Q: Why is bronze-filled PTFE arranged as auxiliary backup ring matching with PU main seal?
A: It fills the assembly clearance between piston and cylinder groove, effectively preventing soft PU seal from being extruded and damaged under sudden peak hydraulic pressure caused by instant heavy loading of wheel loader buckets.

Q: What are the main application positions of NBR rubber fittings in whole cylinder assembly?
A: NBR small O-rings are mainly applied for static sealing gaps on cylinder end caps, threaded pipe joints and fixing bolt holes to avoid slow oil seepage under normal working pressure.

Q: What practical mechanical effect can oil-impregnated fabric wear ring bring to piston operation?
A: It keeps piston running concentrically inside cylinder barrel, prevents piston offset swing, and greatly reduces dry friction loss between piston outer circle and cylinder inner wall during long-time continuous loader operation.

5. Exhibition and Wearhous

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