These kits are custom made in the USA,

Our seals are made thicker than OEM. With that being said, the upper lip is 1mm thicker than the OEM style seals. Depending on your spool valve, you made need to drill out your retainer to roughly 16.50-16.75mm to allow for adequate spacing for the lip to slide into. If the seal is too tight, it will cause binding. These seals are designed to be thicker to help prevent “rolling/blow-outs” under extreme heat and load. Please keep this in mind prior to purchase. If there is any questions, feel free to contact us.

Gen 2 fiber filled PTFE retaining rings.

Now comes with Viton o rings

Check out our page for higher grade deals. These are low grade seals. We have low-mid- high grade seals.

Our product is tested in working machines and verified with a calibrated durometer.

Averaging Shore D 53-60 value PTFE rings (hard to get accurate reading with such a small product). We source the highest quality PTFE. These rings are suitable for use even without the upper lip, as some machines do not come with that. Do not be fooled if you are told it is needed. These are made with help from aviation engineers.

This replacement spool valve rod seal kit is designed specifically for 4-block Chinese mini excavator control valves. The kit includes 8 high-pressure black viton O-rings and 8 white Teflon retaining rings, providing all the essential sealing components needed to rebuild and stop leakage around the spool valve rods.

These seals are commonly used in 0.8–2 ton Chinese mini excavators and fit the standard hydraulic 4-section spool valve block found on many OEM and aftermarket machines. The O-rings provide the primary hydraulic seal, while the Teflon retaining rings support durability, reduce wear, and ensure smooth spool movement within the valve body.

If your control valve is leaking around the rod spools, losing pressure, or showing drifting functions, these seals are the direct-fit solution to restore proper hydraulic operation.

⸻

What’s Included

• 8 black high-pressure Viton O-rings

• 8 white Teflon retaining rings

• Fits 4-block spool valve assemblies

• Designed specifically for spool valve rod sealing

⸻

Key Features

• Direct replacement seals for Chinese mini excavator 4-block control valves

• Includes both O-rings and Teflon retainer rings

• Restores proper hydraulic sealing around the spool rods

• Helps eliminate hydraulic leaks, drift, and pressure loss

• Designed for common 0.8 ton, 1 ton, 1.5 ton, and 2 ton Chinese excavators

• Simple, low-cost repair for extending valve life

• Compatible with most Chinese OEM-style valve blocks

Chinese Mini Excavator Spool Valve Seal Kit Fits 0.8-1.5 Ton Machines Gen 2

Specifications