Dressta Pin Plug 857011129

This is the Track Pin Plug (also referred to as an end seal or dust plug) used in the undercarriage assembly of Dressta crawler dozers.

Product Specifications

Average Weight: ~ 0.3 kg

Compatibility: TD-25M EXTRA ; TD-25R EXTRA ; TD-20M EXTRA ; TD-20R EXTRA ; Etc.

SL: 3C

Key Information

Function and Design

Sealing: Its primary function is to seal the hollow end of the track pin. These pins hold a reservoir of lubricant that keeps the pin-to-bushing interface working smoothly under extreme pressure.

Protection: The plug acts as a barrier against the harsh environment—mud, water, sand, and stone dust—that the track chain is constantly exposed to.

Material: It is typically a hardened metallic or specialized synthetic plug designed to withstand the high-impact environment of the track rail.

Why This Part is Critical

• Preventing "Dry Tracks": Once this plug is lost or damaged, the internal track pin lubricant will migrate out. Once the lubricant is gone, the pin and bushing will begin metal-on-metal grinding. This leads to internal wear (often called "track stretch"), which causes the chain to become loose, clatter, and eventually fail prematurely.

• Contamination: Without the plug, water and fine abrasive grit enter the pin/bushing cavity. This acts like a grinding paste, which can destroy an entire set of pins and bushings in a very short operating time.