Globexim specializes in supplying high-quality aftermarket Kawasaki K3V and K5V series hydraulic pump replacements for excavators from Volvo, JCB, Hyundai, Doosan, Hitachi, Case, CAT and other manufacturers. On this page — answers to the most frequently asked technical questions: how to properly select a pump, what is required during installation, and what conditions must be met to maintain your warranty.
Overview of Kawasaki K3V and K5V Pump Series
| Series |
Displacement |
Type |
Machine Class |
| K3V63 | 63 cc/rev | DT / S | Small and medium excavators |
| K3V112 | 112 cc/rev | DT / S | Medium excavators 20–25 t |
| K3V140 | 140 cc/rev | DT / S | Medium and large excavators |
| K3V280 | 280 cc/rev | DT | Large excavators |
| K5V80 | 80 cc/rev | DT / S | Small and medium excavators |
| K5V140 | 140 cc/rev | DT / S | Medium excavators |
| K5V200 | 200 cc/rev | DT / S | Large excavators |
DT — Tandem (dual), S — Single (single).
K3V112DT series (confirmed in technical documentation): displacement 2×55 cc/rev, nominal pressure 320 bar, maximum 350 bar, maximum flow 2×115 L/min, maximum power 70 kW, maximum speed 2600 rpm.
Pump Selection
How do I quickly select the correct pump for my machine?
To ensure compatibility in flow, pressure and power, send to Globexim:
— a photo of the pump nameplate (model code and serial number);
— a photo of the machine nameplate (make, model, year of manufacture).
Based on this information, our specialists will select a pump with exact parameters.
How do I decode a Kawasaki pump model code?
A model code, e.g. K3V112DT-165R-2N01, contains:
— K3V — pump series;
— 112 — displacement (cc/rev);
— DT — type: Tandem (dual); S — Single (single);
— 165 — regulator code;
— R — rotation direction: clockwise (L — counterclockwise);
— 2N01 — additional specification parameters.
The full code is essential for accurate replacement selection.
What is the difference between K3V and K5V series?
The K5V series is a modernized version of K3V with higher specific power (power per unit mass). At the same displacement, K5V is more compact and lighter. Series correspondence:
— K5V80 → K3V63
— K5V140 → K3V112
— K5V200 → K3V140
The correct choice of series is determined by the original pump code of your machine.
Installation and Startup
How do I prepare my machine for pump replacement?
Safety comes first. Before starting work:
— completely shut down the machine and disconnect the battery;
— relieve pressure in the hydraulic system;
— lock the machine against accidental startup (LOTO procedure).
What should I remember when removing the old pump?
— Hose labeling: before disconnecting hydraulic and electrical hoses, label them — this will prevent mistakes when connecting the new pump.
— Cleanliness: clean the area around the pump before removal. Even minor contamination entering the system can damage the new pump.
— Oil disposal: drain the hydraulic oil and dispose of it in accordance with environmental regulations.
What steps are necessary before installing the new pump?
— Filter replacement: be sure to replace all oil filters. Check the cleanliness of the tank and lines — remove sludge and metal shavings.
— Rotation direction: check the arrow on the pump housing. The shaft rotation direction must match the machine's drive.
— Pump priming (critical!): before installation, fill the pump housing with clean hydraulic oil through the drain port — this prevents a "dry" start that can destroy bearings.
How do I properly start and bleed the system?
— Fill the system with fresh clean oil (recommended cleanliness grade: NAS 1638 Class 9).
— Bleed the system with several short runs under no load according to the manufacturer's instructions.
— During the first cylinder movements, monitor the pump noise level. Strange sounds indicate aeration or cavitation. Check the seal integrity of all connections.
What oil and cleanliness grade are required for K3V/K5V pumps?
Kawasaki K3V/K5V pumps require hydraulic oil with a cleanliness grade no worse than NAS 1638 Class 9. A 10 µm filter is mandatory in the return line, and an 80–150 mesh strainer in the intake line. Using contaminated oil is the most common cause of premature pump failure.
Warranty and Service
What are Globexim's warranty requirements?
Warranty on all spare parts — 6 months from the date of purchase. Conditions for maintaining warranty:
— installation must be performed by an authorized service center or certified technician;
— a properly completed Commissioning Report with date and list of work performed is mandatory.
Without this document, warranty is void.
For what reasons may warranty be denied?
Most common reasons for warranty denial:
— absence of commissioning report;
— unauthorized interference with pump design;
— use of inappropriate or contaminated fluids;
— contamination of the hydraulic system with foreign objects;
— installation errors, including startup without prior oil filling.
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