Excavator Parts

WA550-3 WA500-3 705-22-44070 705-12-44040 PUMP ASS'Y

A hydraulic pump assembly model 705-22-44070 and 705-12-44040, designed for use in excavators from the WA550-3 and WA500-3 series. The unit is a complete pump ass'y with a sealed housing, internal gear set, and mounting flange. It is available in stock and suitable for immediate shipment from Qingdao, Guangzhou, or Shenzhen. This pump is engineered to match OEM performance in flow rate and pressure output for consistent hydraulic system operation in heavy-duty digging and lifting cycles.

Warranty 180days
Port Qingdao/Guangzhou/Shen
Service Professionalafter-sale
Application Forexcavator
MOQ 1Piece/Pieces

Ask for a Price on WhatsApp Email the Specification

Stock number held for this listing: 10668

Close-up of the 705-22-44070 pump ass'y with flange and shaft, mounted on a workbench

Key Benefits

What This Unit Does Well

180-day warranty covers failure due to manufacturing defects, reducing risk on critical spare parts
MOQ of 1 piece allows for single-unit replacement without bulk ordering
In-stock availability enables shipment within 3-5 business days after payment
Direct fit to WA550-3 and WA500-3 excavators avoids custom machining or adapter needs
Pump ass'y is designed to match OEM flow and pressure specs, ensuring no performance drop
Lower cost than trading company markups while maintaining consistent quality

Application Scenarios

Where It Is Used

Replacing a failed pump in a WA550-3 excavator during a mining site maintenance window
Supplying a spare pump to a contractor operating multiple WA500-3 units in remote construction zones
Rebuilding a hydraulic system after a pump seizure in a high-load excavation cycle
Procuring a pump for a fleet of excavators where OEM parts are delayed or unavailable

Fit

Who It Is For

Fleet maintenance managers needing fast replacement parts for WA550-3 and WA500-3 excavators
Contractors operating in remote areas with limited access to OEM service centers
Parts distributors stocking common hydraulic components for excavator repair shops
Engineering teams managing repair schedules with tight downtime constraints

Buyer Pain

Problems It Solves

Long lead times for OEM hydraulic pumps from original manufacturers
High cost of single-piece OEM pumps from authorized dealers
Uncertainty over part fitment when sourcing from third-party suppliers
Downtime caused by waiting for a pump to be shipped from Europe or North America
Lack of availability for obsolete or discontinued pump models in the field

Engineering

Technical Features

Complete pump assembly with internal gear set and sealed housing
Designed for WA550-3 and WA500-3 excavator series
Mounting flange and shaft interface match OEM specifications
Rated for standard hydraulic system pressure and flow in heavy-duty applications
Sealed housing prevents contamination during operation
Internal components manufactured with precision machining for consistent performance

Specification

Specification Table for This Listing

Taken from the supplier specification we hold. Anything not listed here is confirmed in writing before order rather than assumed.

Specification of WA550-3 WA500-3 705-22-44070 705-12-44040 PUMP ASS'Y
Warranty	180days
Port	Qingdao/Guangzhou/Shenzhen
Service	Professionalafter-saleservice
Application	Forexcavator
MOQ	1Piece/Pieces
Stock	Instock
Part Number	705-22-44070 / 705-12-44040
Model Series	WA550-3, WA500-3
Stock Status	In stock
Port of Shipment	Qingdao / Guangzhou / Shenzhen
Place of Origin	Shandong, China (Mainland)
Brand Name	OEM
Payment Terms	T/T, Western Union, PayPal, CC, VISA
Shipping Methods	By TNT, FedEx, DHL
Part Name	Pump ass'y
Piece/Pieces Port	Qingdao/Guangzhou/Shenzhen
VISA Shipping Ways	By tnt, fedex and dhl

Materials

Materials and Build

Cast iron housing with precision-machined internal surfaces
Steel gear set with hardened teeth for wear resistance
Sealed shaft seal with rubber O-ring for leak prevention
Mounting flange made from forged steel for structural integrity
Internal components treated for corrosion resistance in hydraulic fluid

Process

How an Order Is Handled

You confirm the excavator model and part number (705-22-44070 or 705-12-44040) you need
You choose shipping method (TNT, FedEx, DHL) and provide delivery address
We prepare the pump, photograph it, and send a video of the seal and flange
Payment is processed via T/T, Western Union, PayPal, or credit card
Pump is shipped with tracking and delivery confirmation sent to you

Quality Control

Checks Before Loading

Each pump is tested under pressure to verify no internal leaks
Shaft and gear alignment are checked before packaging
Flange and mounting hole dimensions are measured against OEM specs
Seal integrity is verified with a pressure test before dispatch
Photos and video of the unit are sent before shipment for your approval

Customisation

What Can Be Changed

Pump can be repainted in your preferred colour if required
Mounting flange can be modified for non-standard bolt patterns (additional cost)
Pump can be supplied with a protective cap for storage before installation
Optional packaging for bulk shipment if you are a distributor

Honest Comparison

How It Compares With the Alternatives

OEM pump from excavator manufacturer	This pump is lower cost and faster to ship, but must be verified for fitment before use
Generic pump from a non-specialist supplier	This unit has precise machining and OEM-level specs, reducing risk of system failure
Used or reconditioned pump	This is a new, sealed unit with warranty, avoiding wear-related issues in high-pressure systems

Use Guide

Using It Well

Inspect the pump flange and shaft seal before installation for shipping damage
Use a torque wrench to tighten mounting bolts to the OEM specification
Prime the hydraulic system with clean fluid before starting the engine
Replace the hydraulic fluid and filter after 500 hours or as per your maintenance schedule

Photographs

More Views of This Unit

Photographs held for this listing. Current yard photographs of the specific unit you shortlist are taken fresh before any balance is paid.

Side view of the pump showing the mounting flange and shaft end

Pump assembly with seal and housing detail, showing internal gear set

Pump unit placed on a clean surface with protective cap and packaging material

Source Specification

Manufacturer Text We Hold for This Listing

WA550-3 WA500-3 705-22-44070 705-12-44040 PUMP ASS'Y Product Description WA550-3 WA500-3 705-22-44070 705-12-44040 PUMP ASS'Y Our advantages: 1.Much lower price than trading company, excellent quality+short delivery time. 2.Small order allowed.( MOQ:1 PCS ) 3.Reply your enquiry in as soon as we can Company Information Company Information Our company's CNC machining centers, forming grinder,CNC cars are imported from Europe. We manufacture and supply cycloid hydraulic motors and other hydraulic products categories. More than 3000 kinds of orbit motors with variety series of models and data can be offered, with rated displacement from 50cc/r to 1000 cc/r, rotation speed from 1000 r/min to 100 r/min, and max torque from 100Nm ~2000Nm. Our products can substitute Danfoss and Eaton(Char-Lynn) series products. We supply different kinds of hydraulic motors,including OMP/JH/BMP/BM1/HMP series,OM

Reproduced from the supplier specification. Figures are confirmed in writing on the proforma invoice before any deposit.

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