705-56-36040 Gear Pump
Key Features
OEM‑compatible part number: 705‑56‑36040 (also referenced as 7055636040 or R705‑56‑36040 in some catalogs).
Specifically matched for Komatsu WA250/WA270 series: Supports a variety of sub‑models including WA250, WA250L, WA250PT / PTL / PZ, WA250‑5 / 5L, WA270‑5, WA270‑5‑SN, etc., ensuring broad compatibility across these loader variants.
Quality aftermarket pump assembly: Manufactured to meet or approximate OEM specifications. Suitable as a direct swap / replacement for existing hydraulic systems in compatible wheel loaders.
Durable construction: Designed for heavy‑duty loader hydraulic systems — able to handle typical loader demands including lift, dump, steering and other hydraulic operations.
Simplified procurement & maintenance: Using a clearly defined part number and compatibility list helps avoid ordering errors; good option for aftermarket spare-part supply
Technical Specifications & Fitment
Item Specification / Details
Part Number(s) 705‑56‑36040 / 7055636040 / R705‑56‑36040
Applicable Machine Models Komatsu Wheel Loader WA250, WA250L, WA250PT / PTL / PZ, WA250‑5 / WA250‑5L, WA270‑5, WA270‑5‑SN.
Condition New aftermarket / replacement pump assembly (aftermarket new)
Typical Part Composition / Internal Components Gear pump case, drive gear, driven gear, carrier, side plates, bushings / bearings / O-rings / dowel pins, as relevant for standard gear‑wheel pump assembly.
Approximate Weight ~ 28.6 kg (per listing)
Use Case Hydraulic system pump for wheel loader — provides oil flow & pressure to actuators (lift, dump, steering, etc.) in loader hydraulic systems.
Frequently Asked Questions (FAQ)
Q1: What machines/models is the 705-56-36040 pump compatible with?
A: This pump is designed for Komatsu wheel loaders — in particular the WA250 and WA270 series (including sub-models such as WA250, WA250L, WA250PT / PTL / PZ, WA250-5 / 5L, WA270-5, etc.).
Q2: Is this pump new, and is it ready to install?
A: Yes — the 705-56-36040 pump sold is “aftermarket new” (not rebuilt or used) and comes as a ready-to-install pump assembly.
Q3: What are the main functions of this hydraulic gear pump?
A: As a gear-type hydraulic pump, it provides the necessary hydraulic fluid flow and pressure for loader operations such as lifting, dumping, steering and other hydraulic functions in the loader hydraulic system.
Q4: How reliable and efficient are gear pumps like this one?
A: Gear pumps generally have relatively simple design, which makes them easy to maintain. They also tend to offer good volumetric efficiency (many gear pumps achieve ~93–98% efficiency or higher) when properly maintained.
Q5: What are common reasons for hydraulic gear pump failure or performance issues?
A: Some frequent causes include: contamination of hydraulic fluid (dirt, particles, water) causing wear of gears/seals; extended operation under heavy load or high temperature; improper installation or misalignment; or hydraulic fluid viscosity / quality issues.
Q6: Can a gear pump like 705-56-36040 be repaired / rebuilt instead of replaced?
A: In many cases, gearbox-type hydraulic pumps cannot be reliably “repaired” — worn internal components (gears, housings, side plates) often require full replacement rather than partial repair.
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