Excavator kubota U30-3 U35-3 U35-5 Hydraulic Pump RC511-61115 RC511-61112 RC788-61112 RC788-61113 Hydraulic Pump AP2D18 Main Hydraulic Pump

Here is the English translation of the information above, formatted for your convenience when communicating with international suppliers:
Kubota excavator models have multiple generations (e.g., -3, -4, -5 series). The OEM (Original Equipment Manufacturer) hydraulic pump part numbers vary depending on the specific production year and the chassis serial number.
Below are the common OEM part numbers and pump model codes for the Kubota U30, U35, and KX135 models:
1. Kubota U30 / U35 Series Hydraulic Pump
These two models often share the same platform or feature compatible pumps depending on the generation.
Common OEM Part Numbers:
RC511-61115(A very common OEM main pump part number, frequently used for U30-3, U30-5, U35-3, etc.)
RC511-61112
RC788-61112 / RC788-61113** (Commonly used for newer generations like the U35-4)
Pump Model (Nameplate Code):
Typically manufactured by KYB, belonging to the **AP2D18 series (e.g., AP2D18LV1RS7).
2. Kubota KX135 Series Hydraulic Pump
The KX135 belongs to a larger tonnage class (typically around 13.5 tons), meaning its hydraulic pump has a significantly higher flow rate and displacement than the U30/U35.
Common OEM Part Numbers:
Due to differences in chassis variations, the OEM part numbers generally start with the prefix RD511-XXXXX or RG511-XXXXX
Pump Model (Nameplate Code):
The most common OEM main pump installed on the KX135 is manufactured by KYB
The exact model code on the pump's nameplate is usually: **PSVL-54CG-18 (or the **PSVL-54CG series).
> Tips for Purchasing Parts:
> 1. Check the Pump Nameplate: If the 10-digit Kubota OEM part number is difficult to look up, the safest method is to check the manufacturer's model code*(such as AP2D18... or *PSVL-54...) stamped on the aluminum nameplate of the pump body. Ordering parts using this code is often more accurate than using just the excavator model.
2. Verify with the Machine Serial Number: Models can vary slightly depending on whether they are older versions, grey market imports, or compliant with specific regional emission standards (which can change oil port directions or control valve interfaces). It is highly recommended to provide your supplier with the **complete machine serial number (Chassis Number) found on the excavator's main nameplate to cross-reference with the official parts catalog.