The order we never skip — which is why the wrong part does not reach your site.
01
Confirm
Nameplate, OEM number and working conditions — checked against your machine, confirmed in writing before you pay.
02
Verify
Photos and video of the actual part, packed and labelled, before it leaves. What you see is what ships.
03
Prevent
Send the hour-meter reading and we log the service interval — you get a message before the next one is due.
04
Dispatch
Nothing leaves Xi’an until you reply "ok". You approve, then we ship — not the other way round.
Confirm this part for my machine
Machine model and part number are what let us confirm fitment in writing. Message is optional.
Overview
Fitment Note: Confirmed by the removed bushing number and the connecting rod bore. Rod bushings are matched by size - an oversize may be required after a rod re-bore.
Specifications
MOQ
6 pcs
Type
Connecting Rod Bushing
Engine
CAT 3066 / S6K / C6.4
Length
35 mm
Material
Bimetal (Steel Back / Copper Alloy)
Position
Connecting rod small end
Replaces
CAT 5I-7539
Shipping
Rail / Sea / Air
Warranty
12 Months
Lead Time
15-30 Days
Application
CAT 320B / 320C / 320D
Outer Diameter
37 mm
Aftermarket connecting rod bushing (small-end / conrod bush) 5I-7539A — a direct replacement for the Caterpillar 5I-7539 rod bushing. It fits the Caterpillar 3066 / S6K / C6.4 diesel engine family (also 3064 / C4.2), commonly used on CAT 320B / 320C / 320D excavators.
The rod bushing carries the piston-pin end of the connecting rod. When it wears, the small end develops radial play — typical signs are a knocking under load, low or fluctuating oil pressure, and in severe cases a seized or scored piston pin. It is normally renewed together with the big-end bearings during an engine overhaul.
Bimetal construction: a steel backing with a copper-alloy (bronze) lining, machined to the oil clearance. Confirm the removed bushing number and the measured bore before ordering; measure the connecting rod bore because an oversize bush may be needed after a rod re-bore.
