Order(MOQ):
1pcGoods Stock:
100Payment:
T/T, Western Union, L/C, Paypal, etcProduct Origin:
KoreaShipping Port:
Huangpu, GuangzhouLead Time:
In StockPart No:
640306Model:
Application:
EXCAVATOROTTO Excavator Hydraulic Pump Valve Plate 640306
This DM valve plate is a core friction pair component inside the hydraulic main pump. It forms oil distribution interface with piston shoe, controlling suction and discharge oil flow.
High hardness precision grinding surface reduces friction burn and metal stripping, stabilizes pump output and extends pump service life to avoid sudden pump failure.
| Item | Details |
|---|---|
| Product Name | Hydraulic Pump DM Valve Plate |
| Part Number | 640306 |
| Brand | Dongming (DM) / OTTO aftermarket supply |
| Material | Heat-treated Alloy Steel, Precision Ground Working Surface |
| Application | Internal flow distribution friction part of axial piston main pump |
| Applicable Machine | Crawler Excavator |
| Applicable Model | ZAX330, EX300-5, HD1430, VOLVO360, SK350-8 |
| Key Parameters | Flatness & surface roughness controlled for pump friction pair matching |
| Function | Cooperate with piston shoe to distribute oil inlet and outlet, switch high/low pressure oil circuit inside pump |
| Operating Temperature | -20℃ ~ +85℃ |
| Weight | 3.2 KG/pc |
| Quality & Condition | Brand New Aftermarket, Dongming OEM Grade |
| Warranty | 6 months |
Key Product Advantages
Compatible Equipment & Fitment Details
Direct OEM Replacement / Cross References: 640306 Compatible Machine Models: Hitachi: ZAX330, EX300-5 Kato: HD1430 Volvo: EC360 Kobelco: SK350-8 Related Components / Assembly: Pump piston shoe, cylinder block, pump repair kit, servo valve assembly Installation Note: Clean pump cavity thoroughly before assembly; check surface scratch and flatness; strictly follow pump overhaul torque and clearance standard.
Applications & Operational Environments
| Application Description | Performance |
|---|---|
| Inside main hydraulic pump, friction pair with piston shoe | Switches suction and pressure oil flow to maintain pump power delivery |
| Mining & Quarrying Sites | Endures frequent pressure fluctuation and sliding friction, resists surface scoring |
| High-Temperature Working Zones | Heat-treated alloy keeps surface hardness stable under sustained high oil temperature |
| Demolition & Dusty Work Sites | Smooth precision surface blocks tiny abrasive particles from locking friction pair |
| Excavator Maintenance | Replace worn, burnt, scored valve plate to restore pump efficiency and reduce internal leakage |
| Repair Workshops & Fleets | Standard dimension fits pump overhaul, shortens pump rebuild cycle and machine downtime |
Our Advantages
1.TECHNICAL SERVICE
We provide modification technology service, the product has been tested modifed, the engine can be directly installed and used.
2.CERTIFICATE
With Export certificate License.Double confirmation before shipping, if we sent the wroncparts we will send corect one.
3.SERVICE TEAM
With professional after-sale team, will help you to trace the goods. And our engineers will assist with any installation issues.
4.TECHNICAL SERVICE
Free Sample is acceptable.We serves manywell-known Hitachi Komatsu Caterpillar Kobelco in your country.
FAQ
Q1: Is secondary programming or special adjustment required after installation?
A: No programming needed. It is a mechanical friction component. After assembly, bleed air and test pump pressure according to pump service manual.
Q2: How can buyers confirm this valve plate matches their excavator correctly?
A: Please provide machine model, original pump model and old part number. We check pump structure and port layout to confirm matching.
Q3: What pre-shipment tests are performed and what does the warranty cover?
A: Each plate is inspected for surface scratch, flatness and dimension. Warranty covers manufacturing defects; damage from oil contamination, improper assembly is excluded.
(2) Small order:DHL,TNT,UPS,FEDEX,EMS,ARAMEX.
Q7:What's the terms of the transaction?
A:EXW,FCA,FAS,FOB, C&F,CIF,CPT,CIP,DAF,DES,DDP.
Q8:How about the lead time?
A:(1) ln stock: 1-3 days.Always in 24 hours.
(2) Out of stock: lt's according to your quantity, and we have cooperated with factory,We will let you know when we quote.
Tags :
Tel : +86-15302269990
WhatsApp : +8615302269990
WhatsApp : +8619125112809
E-mail : service@gzotto.com
E-mail : sales02@gzotto.com
Address : No.1108 & 1109 Tower 2, Yuzhu haisi innovation Center, Huangpu District, Guangzhou, China
Friendly Links :
hitachi-isuzu© 2026 OTTO EXCAVATOR PARTS CO., LIMITED All Rights Reserved.
Hi! Click one of our members below to chat on
