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 valve number and its length. 134 mm overall. The quantity depends on the engine - tell us your engine and we confirm the number; exhaust valves quoted separately.
Aftermarket inlet valve (intake valve) 5I-7738A — a direct replacement for the Caterpillar 5I-7738 valve. It fits the Caterpillar 3066 / S6K / C6.4 diesel engine family (also 3064 / C4.2), commonly used on CAT 311 / 311B / 311C / 312B / 320 / 320B / 320C / 320D excavators. Overall length 134 mm.
The inlet valve opens to let air into the cylinder and closes against the seat to seal compression. When the head or seat wears, the valve loses compression — typical signs are rough running, hard starting, a drop in power and high exhaust temperature on the affected cylinder. Valves are normally inspected and replaced during a cylinder-head overhaul or when the valve clearance can no longer be set. Supplied as a single valve.
Tell us the engine and the quantity — the number of valves depends on the engine. Confirm the removed valve number and its length before ordering.
