A gearbox price can look competitive until the buyer finds out that it assumes an exchange core, excludes accessories or describes a different configuration. Put those conditions next to the price before comparing offers. The RTD11509C gearbox assembly catalog entry for XCMG QY50K and QY70K is a reference to investigate. The machine names in a listing do not confirm a match to a particular crane.
Send the full model, serial and any variant markings from the plate on the fitted gearbox. Include the crane model and serial separately. If the gearbox was replaced before, say which information comes from the unit and which comes from older paperwork. A buyer should be able to identify the source of each number without having to interpret a folder of unlabelled photos.
Photograph the visible interfaces and the installed arrangement where they can be accessed safely. If the gearbox is already out as part of a planned repair, ask the workshop to identify which details should be compared with the proposed replacement. Include any supplied drawing references. The parts desk should not infer every interface from the model family, and purchasing should not use a picture of a similar housing to approve fitment. Ask the supplier to flag the details it cannot confirm.
Ask whether the offer covers a complete crane gearbox assembly, a repair service or an exchange unit. Do not assume the listing provides all three options. If a supplier offers an exchange, have it state the core requirements, return deadline, return freight responsibility and what happens if the removed unit is rejected. Keep refundable amounts separate from the item price. That makes it possible to compare total cost without treating a conditional credit as a discount already earned.
List any items that the workshop expects to transfer from the old gearbox and ask what arrives with the offered unit. If a related accessory is required, have it quoted on its own line. Make sure the written quote identifies condition and any warranty terms rather than assuming that the words “assembly” or “replacement” establish what the supplier guarantees. Ask who will confirm any outstanding fitment details before the order becomes binding.
Request a photograph of the supplied unit’s plate and a packing list before dispatch where the supplier can provide them. A gearbox exchange quote should also state how the removed gearbox is to be identified for return. Keep those two records separate so the dispatch label for the replacement cannot be mistaken for the core label. Ask for package dimensions and gross weight to plan receiving, without using a sales estimate as a lifting instruction.
On arrival, check the plate and package condition against the agreed order before the unit enters the workshop. Photograph discrepancies before the unit is unpacked further and ask the supplier to explain any unapproved reference change. Keep the shipment and core-return paperwork together until the exchange is closed. This is particularly useful where different repair jobs are being handled at the same time and the old units will leave the site before the new units are commissioned.
No. The buyer should confirm the fitted gearbox identification and configuration, the actual reference offered and the scope of supply. If an exchange is proposed, approve the return conditions as part of the same purchasing decision.
If the machine cannot stay down while a core is assessed, make that constraint visible before comparing offers. Ask when the replacement can be dispatched and whether the supplier requires the old unit first. Those answers affect the repair schedule even when the two quoted unit prices are identical.
Use the crane spare parts quote comparison to put exchange terms and supplied items on the same sheet. If the replacement arrives before the old unit is returned, track both movements through the parts mismatch and return record. For another scope distinction on the drivetrain, see the clutch disc and pressure plate guide.
