The five facts a quote needs
A usable inquiry contains five things: the machine model, the full serial number, the part numbers you have, the quantity, and the destination port. Every one of them changes the answer, and none of them is optional in the sense that a supplier can guess it reliably.
The model tells us the family. The serial number tells us which variant inside that family, which is the fact most often left out and the one that causes the most wrong parts. The part numbers identify the item even when they are superseded. The quantity decides whether the line ships from the shelf or is sourced, and it changes the price. The destination port decides whether the freight is a rounding error or the largest number on the page.
Why the serial number is the fact that matters
Two excavators of the same model year, from the same factory, can carry different hydraulic pumps, different injectors, different wiring harnesses and different final drives. The change happens at a point in the production run, and the point is recorded against the serial number. A quotation built from the model name alone is a guess that happens to sound authoritative.
The practical rule is simple: the serial number is on the machine's identification plate, and photographing that plate takes less time than re-sending an inquiry. If the part has already been removed, photograph it too, with any stamped or cast number visible.
What to send when you do not know the part number
This is a normal situation, not an imposition, and it is workable. Send three things: the machine model and serial number, a description of what the machine is doing, and a photograph of the component with any markings visible.
Pumps, motors, injectors and final drive housings carry identification on the casting or on a plate that rarely wears away. In many cases that number identifies the assembly and its variants without any further information. What does not work is a description alone, such as a photograph of a failed part with no machine attached to it and no numbers anywhere in the frame.
Two mistakes that cost buyers real money
The first is ordering from a superseded number without checking whether it substitutes. Supersession usually means the newer number replaces the older one, but a superseded number is not automatically interchangeable in every application, and the exception is exactly where a mistake is expensive.
The second is not stating the grade. A buyer who sends a part number and asks for the price will receive a price for something, and it may not be the grade they had in mind. Naming the grade costs one sentence and removes an entire class of dispute.
Guangzhou Shenyue Machinery Technology Co., Ltd. has been supplying excavator parts from Guangzhou since 2007, with 3,000+ part types on the shelf and 100,000+ part numbers available to order. Every inquiry that reaches us is checked against model and serial number before a quotation is issued, because that check is cheaper for both sides than a returned part.
Copy this into your inquiry
- Machine model, exactly as on the nameplate
- Full serial number, not just the prefix
- Every part number you have, including old and superseded ones
- Quantity, and whether the order is one-off or repeat
- Grade wanted, if you have a preference
- Destination port, and whether you want FOB or delivered terms
- Photograph of the nameplate and of the failed component
Frequently asked
I only have a photograph of the part. Is that enough?
Sometimes. If the photograph shows the housing clearly and any stamped or cast number is legible, that is often enough to identify the assembly and its variants. If it is a photograph of a bare part with no markings in frame, it usually is not, and the machine model and serial number will be needed as well.
How quickly should I expect a reply?
A complete inquiry can normally be answered with a priced quotation in the same working window. An incomplete one has to be sent back with questions, which is the delay most buyers attribute to the supplier. Sending the five facts up front is the single biggest thing a buyer can do to get a fast, accurate answer.
Can you quote without the serial number?
We can quote, but the quotation carries an assumption, and we would rather say so than pretend the assumption is not there. Where a part number is supplied and is unambiguous for the model, the serial number adds less. Where the part is a pump, injector, harness or final drive, it is the difference between a quotation and a guess.
Send the machine model, serial number, the part numbers you have and the quantity. That is all we need to quote and confirm fitment before payment.
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