Bushing Manufacturer & Supplier – EMD 645 & 710 Parts

Overview

Bushings show up wherever an EMD 645/710 engine needs a low-friction, replaceable wear surface instead of letting a shaft or pin wear directly against an expensive parent bore — piston pin bores, connecting rod small ends, and accessory shafts among them.

How It Works in the Engine

Pressed into the bore, the bushing takes the running wear itself: the pin or shaft rides on the bushing's inner surface, which is far cheaper and faster to replace than machining or line-boring the housing it sits in. That's the whole point of the part — it's designed to be the thing that wears out first, on purpose.

Signs You Need a Replacement

• Bore wear or ovality where the pin/shaft rides
• Excess play or clearance at the pin or shaft it supports
• Bushing spinning or migrating slightly in its housing bore
• Scoring on the shaft surface indicating the bushing has worn through

Why Source This From Apex International

Inner and outer diameters are held to EMD/DLW reference tolerances, so press-fit and running clearance both come out right the first time — a bushing that's slightly oversized or undersized causes exactly the problem it's meant to prevent.