Sourcing CAT MD6240 and MD6290 Drill Parts
For CAT MD6240 and MD6290 drill parts, the exact model and component reference belong at the start of every enquiry. Similar descriptions such as “CAT drill gearbox” or “drill jack cylinder” leave too much unresolved.
Caterpillar publishes separate model records for the MD6240 rotary drill and MD6290 rotary blasthole drill. A shared brand or similar purpose does not establish that a component is interchangeable between them. Confirm the offered part against your particular drill.
Start with the machine and the assembly
Send the drill's exact model and serial number, plus photographs of the machine identification plate and the component label. State where the component sits and what assembly you need.
Keep the manufacturer's part number separate from the supplier's stock code. A stock code identifies the seller's item; it may not identify its technical application.
If the drill has had a replacement assembly or modification, tell the supplier. Ask your workshop to check the installed component as well as the original machine documentation.
Specifying a rotary head gearbox
Establish whether the requirement is for a complete rotary head, the gearbox alone or an internal repair part. Then ask the supplier to confirm:
- The full assembly reference and any alternative or superseded number.
- The drive and output connections applicable to your installation.
- Mounting and interface details.
- Whether the motor, adapters, couplings and mounting hardware are included.
- Any configuration differences relevant to the offered unit.
Request clear photographs from several sides, including the identification plate. For a used or rebuilt gearbox, ask for inspection findings and an explanation of the final test performed. Your workshop should assess which evidence is appropriate for the assembly.
A gearbox appearing in a search for MD6240 parts is only a lead. The supplier still needs to confirm fitment against the specific reference and drill serial number.
Specifying a jack cylinder
Identify the cylinder's position on the machine before discussing a replacement. Ask for the assembly number, mounting arrangement, connection details and the relevant dimensions or stroke information needed to check compatibility.
As an example, PartsNonStop includes a seller listing titled CAT MD6290 drill jack cylinder, reference 530-6945. Use that title and reference to start an enquiry. Ask the supplier to confirm the application against your machine serial number and installed cylinder; the title alone does not complete that check.
Also confirm whether the offer includes items such as the rod end, mounting hardware or associated fittings. Obtain the actual contents in writing.
Assess rebuilt drill assemblies by the recorded work
For a rebuilt gearbox, request the inspection, measurement and replacement record for its internal components, followed by relevant test evidence.
For a rebuilt cylinder, ask what was done to the barrel, rod, piston and gland, which seals were fitted and what inspection or testing followed assembly. Do not infer the scope from fresh paint or the word “rebuilt”.
Keep any operating hours since rebuild separate from the donor machine's hours. Confirm the warranty provider, installation requirements and whether the quotation is outright or subject to core return.
An enquiry your supplier can work with
Please quote [assembly], part number [reference], for CAT [MD6240 or MD6290], serial [number]. The component is located at [position]. Identification photographs are attached. Please confirm exact compatibility, included components, condition, rebuild scope and test evidence where applicable, stock location, dispatch timing and warranty/core terms. Delivery is to [destination].
Common questions
Can an MD6290 part also fit an MD6240?
Ask for confirmation against the exact part and both machine applications.
Does a gearbox listing cover a complete rotary head?
Request an itemised description and photographs to establish what is included.
Request your drill parts through PartsNonStop with one clearly identified requirement per assembly. This gives the supplier the information needed to assess the part and provide a usable quotation.