A failing main pump announces itself slowly: cycle times stretch, the machine feels weak under combined movements, and the case-drain flow climbs as internal leakage grows. Because a pump is matched to the machine's engine, valve block and displacement control, replacement is a part-number exercise. Kyotechs' documented pump listings carry the original number plus the cross-references recorded for the same unit — the table below reproduces them exactly as listed.
Documented listingsDocumented Pump Listings
| Part number | Part | Compatible with | Machine models |
|---|---|---|---|
| 114-0602 / 1140602 | Hydraulic main pump (cross-refs 1574429, 0R-8102, 162-0917, 087-4828, 099-5858, 099-5865) | Caterpillar | E320L, E320B, E325B |
| 173-3381 | Hydraulic main pump | Caterpillar | 320D, E320C, E320D |
| 176-3963 | Hydraulic main pump assembly | Caterpillar | E315C, E315, E315D |
| 14531612 | Cooling fan pump | Volvo | EC750D |
The same catalogue covers the parts around the pump: pump repair kits for Komatsu and Hitachi pumps are documented Alibaba listings, and the hydraulic repair team rebuilds pumps that are worth saving — see the hydraulic repair solution. If your number is not in the table, send it anyway: the catalogue behind this site is larger than the documented extract, and the first reply either matches a listing or says so plainly.
Before You Enquire
- The number stamped on the pump plate — or a clear photo of the plate. Cross-reference numbers help, but the stamped number decides.
- Machine model and serial prefix. The same model name can carry different pumps across serial ranges.
- What failed. Low power everywhere points to the pump; one weak function usually points to the control valve or a cylinder instead.
- New or rebuilt. Documented listings state condition per product; the rebuild route is priced after inspection of your old unit.
Delivery and preparation times are confirmed for your order in the enquiry reply, in writing and before payment: the reply states the times, the packing and the shipping method that apply to your exact part number. Times are confirmed per order rather than published as a general figure, because they follow the listing, the quantity and the destination.
Frequently Asked Questions
Can you supply a pump if I only have the machine model?
A model narrows the search, but pumps are confirmed by part number. Send the model and serial prefix plus any number from the pump plate or the old invoice, and the reply will identify the documented listing that fits.
Do you rebuild pumps, or only sell them?
Both. The hydraulic repair solution refits and rebuilds pumps and bench-tests them before dispatch, with a test video for every rebuilt item.
Do the parts carry a warranty?
Warranty terms are confirmed in writing for each order before payment. Kyotechs' own FAQ states that most parts are backed by a warranty against manufacturing defects; ask for the term that applies to your listing when you enquire.
Reading the Symptoms Before You Spend
Pump diagnosis rewards patience, because the same weakness can come from the engine, the pump or the valve. The sequence experienced mechanics use: check engine speed and power first (a tired engine makes a healthy pump look weak); then measure pump pressure and flow against the machine's specification; then check case-drain flow, which rises as internal wear grows. If only one function is weak while others pull normally, the pump is rarely the culprit — look at the control valve section or the cylinder for that function. Kyotechs' documented listings and its rebuild route both start from this evidence, which is why the enquiry asks what has been measured, not just what has been felt.
One more protection for buyers: pumps are heavy, high-value freight. The enquiry reply confirms the exact listing, its condition and its cross-references in writing before payment, so the number you approved is the number that ships.