Order(MOQ):
1pcGoods Stock:
100Payment:
T/T, Western Union, L/C, Paypal, etcProduct Origin:
KoreaShipping Port:
Huangpu, GuangzhouLead Time:
In StockPart No:
640101Model:
Application:
EXCAVATOROTTO Excavator Swing Motor Cylinder Block 640101
This Tongmyung swing cylinder block is the core rotating friction component inside the swing axial piston motor. It accommodates piston assemblies and distributes hydraulic oil for slewing movement.
Precision hardened bores and flat mating surface reduce internal leakage and scoring, maintaining stable swing torque and preventing unexpected rotation failure.
| Item | Details |
|---|---|
| Product Name | Swing Motor Tongmyung Cylinder Block |
| Part Number | 640101 |
| Brand | Tongmyung Original |
| Material | Heat-Treated Alloy Steel, Precision Machined Bore Surface |
| Application | Rotating core part of excavator swing axial piston motor |
| Applicable Machine | Crawler Excavator |
| Applicable Model | E320C, E320D, SK200-6E, ZAX200, ZAX230, EC210B |
| Key Parameters | Bore tolerance and flatness controlled for piston and valve plate matching |
| Function | Holds piston assemblies, rotates with drive shaft, distributes inlet and outlet oil for swing torque output |
| Operating Temperature | -20℃ ~ +85℃ |
| Weight | 4.6 KG/pc |
| Quality & Condition | Brand New Tongmyung Original |
| Warranty | 6 months |
Key Product Advantages
Compatible Equipment & Fitment Details
Direct OEM Replacement / Cross References: 640101 Compatible Machine Models: Caterpillar: E320C, E320D Kobelco: SK200-6E Hitachi: ZAX200, ZAX230 Volvo: EC210B Related Components / Assembly: Swing motor valve plate, piston shoe, swing motor repair kit, retainer plate Installation Note: Thoroughly clean motor cavity and oil passages before assembly; check flatness and clearance; follow swing motor overhaul torque standard.
Applications & Operational Environments
| Application Description | Performance |
|---|---|
| Inside swing motor, rotating with drive shaft | Drives upper structure slewing and delivers steady swing torque |
| Mining & Quarrying Sites | Handles frequent start-stop rotation load, resists bore scoring and galling |
| High-Temperature Working Zones | Hardened alloy surface keeps stable hardness under sustained high oil temperature |
| Demolition & Dusty Work Sites | Precision bore surface blocks abrasive dust from sticking piston movement |
| Excavator Maintenance | Replace scored, deformed cylinder block to recover swing power and reduce internal leakage |
| Repair Workshops & Fleets | Standard Tongmyung dimension speeds up swing motor rebuild, cuts 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 required. It is a mechanical rotating component. After assembly, bleed air and test swing pressure following the motor service manual.
Q2: How can buyers confirm this cylinder block matches their excavator correctly?
A: Please provide machine serial number, swing motor model and old part number. We verify motor structure and bore layout before shipment.
Q3: What pre-shipment tests are performed and what does the warranty cover?
A: Each cylinder block is inspected for dimension and surface condition. Warranty covers manufacturing defects; damage caused by oil contamination or 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
