Description
Komatsu’s catalogue confirms 708-1T-00472 as a Pump Assembly with a published width of 287.5 mm. The two neighbouring numbers are the part of this listing that needs care, because suppliers treat all three as one part and the manufacturer’s data does not support that.
Variants, stated as evidence rather than as a rule
| Number | Where it appears | Status of the evidence |
|---|---|---|
| 708-1T-00472 | Komatsu online parts catalogue, item name Pump Assembly, width 287.5 mm | Manufacturer-confirmed entry |
| 708-1T-00470 | Trade listings for D155A-6 and D155AX-6; no current Komatsu catalogue entry found | Trade-established only |
| 708-1T-00471 | Trade listings for D155AX-6 and D155A-6R; no EPC-derived record located | Trade-established only |
No source we could check documents a supersession chain between these three, and the physical differences are not published. The reasonable reading is that they are separate catalogue line items covering different build specifications of the same machine family, which is common in Komatsu numbering. What that means commercially: do not order by the model badge, and do not assume a supplier’s compatibility list is a substitute table.
How we quote it
Send the number cast on your old pump and the machine serial. If the parts record for that serial gives 00470 or 00471, we will tell you whether we stock that specific item or whether 00472 is the current catalogue answer, and we will say so before you pay rather than after the pump arrives on the bench.
Diagnosis and fitting
- Clean the core pack first, then measure fan speed and pump output with the oil hot.
- Short output points at this pump; correct output with a lagging fan and a heavy motor drain points at the motor.
- Match shaft spline, pilot, flange, port positions and control orientation against the removed unit.
- Prime the casing before cranking, change the return filter element, keep the case drain unrestricted to tank, and target ISO 4406 18/16/13.
The test sequence is in our guide de diagnostic des pompes de ventilateur hydrauliques, and the D275A-5D fan pump is on our 708-1T-00421 page.
Commande
Commande minimum une pièce. Garantie de trois à six mois sur les unités neuves du marché de l'après-vente, telle qu'indiquée sur votre facture proforma. Contrôlée au banc et photographiée conformément à votre commande avant fermeture de la caisse en bois, livraison sous 5 à 8 jours ouvrables à compter du paiement, sous réserve de stock. La gamme se trouve sous Moteur de ventilateur hydraulique Komatsu.
