GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED
GZ Yuexiang Engineering Machinery Co., Ltd Customer first, quality first, and honest cooperation.
Add to Cart
Hyundai R305-7 hyundai motor 31N8-40011 travel motor assy for excavator spare parts
| Appliion | Excavator |
| Part name | Final Drive Assy |
| Model | 31N3-40010 XJDG-00072 XJDG-00074 XJDG-00085 |
| Model | R110-7 |
| Payment term | T/T, Western union, PayPal |
| Delivery | 3 days after the payment received |
| Shipment | by sea, by air, by express or as required |
The excavator travel assembly is the core component for machine movement, consisting of a hydraulic motor, reduction gearbox, sprocket, track chain, idler wheel, carrier roller, and track roller. Its key function is to convert hydraulic energy into mechanical power, enabling stable mobility across challenging terrains.
Hydraulic Power Transmission
The hydraulic pump transforms engine power into high-pressure oil, which is transmitted to the travel motor via hydraulic lines.
The travel motor converts hydraulic energy into rotational kinetic energy, generating high-speed, low-torque output.
Speed Reduction & Torque Amplification
The gearbox reduces motor speed through gear sets while significantly increasing torque, ensuring sufficient traction force for the sprocket.
Track Drive Mechanism
The sprocket engages with track links to drive the track chain. Carrier rollers and track rollers form a closed-loop track system, while the idler wheel adjusts track tension.
Differential control of dual travel motors enables forward/reverse movement, steering, and zero-radius rotation.
| # | Part No | Part Name | Qty. | Price request |
|---|---|---|---|---|
| * | 31N8-40011 | TRACK MOTOR | 1 | |
| *-1 | XJCK-00123 | TRAVEL MOTOR UNIT | 1 | |
| 27 | XJCK-00045 | CASING | 1 | |
| 28 | XJCK-00122 | COVER-REAR | 1 | |
| 29 | XJCK-00121 | BLOCK-CYLINDER | 1 | |
| 30 | XJCK-00042 | RETAINER-SHOE | 1 | |
| 31 | XJCK-00041 | PLATE-FRICTION | 4 | |
| 32 | XJCK-00040 | PISTON-BRAKE | 1 | |
| 33 | XJCK-00039 | PLATE-SEPARATING | 5 | |
| 34 | XJCK-00120 | PLATE-VALVE | 1 | |
| 35 | XJCK-00037 | SHAFT | 1 | |
| 36 | XJCK-00036 | COUPLING | 1 | |
| N37 | XJCK-00035 | PLATE-SWASH | 1 | |
| N38 | XJCK-00034 | PIVOT | 2 | |
| 39 | XJCK-00077 | HOLDER-SPRING | 1 | |
| 40 | XJCK-00119 | PISTON ASSY | 9 | |
| 41 | XJCK-00031 | D-RING | 1 | |
| 42 | XJCK-00030 | D-RING | 1 | |
| 43 | XJCK-00029 | VALVE-CHECK | 3 | |
| 44 | XJCK-00028 | RING-RETAINER | 1 | |
| 45 | XJCK-00027 | RING-RETAINER | 1 | |
| N46 | XJCK-00026 | SHIM | 1 | |
| 47 | XJCK-00025 | PISTON | 1 | |
| 48 | XJCK-00024 | BALL | 1 | |
| 49 | XJCK-00023 | JOINT-BALL | 1 | |
| 50 | XJCK-00022 | SEAL-PISTON | 1 | |
| 51 | XJCK-00021 | RESTRICTOR | 1 | |
| 52 | XJCK-00020 | RESTRICTOR | 1 | |
| 53 | XJCK-00019 | SEAL-OIL | 1 | |
| 54 | XJCK-00018 | SPRING-CHECK VLV | 3 | |
| 55 | XJCK-00017 | SPRING-CYLINDER | 9 | |
| 56 | XJCK-00016 | SPRING-BRAKE | 12 | |
| 57 | XJCK-00015 | BEARING | 1 | |
| 58 | XJCK-00014 | BEARING | 1 | |
| 59 | XJCK-00013 | SCREW-CAP | 10 | |
| 60 | XJCK-00012 | PIN-PARALLEL | 1 | |
| 61 | XJCK-00011 | O-RING | 3 | |
| 62 | XJCK-00010 | O-RING | 2 | |
| 63 | XJCK-00009 | O-RING | 3 | |
| 64 | XJCK-00008 | O-RING | 1 | |
| 65 | XJCK-00007 | O-RING | 1 | |
| 66 | XJCK-00137 | RELIEF VALVE | 2 | |
| 67 | XJCK-00005 | PILOT VALVE | 1 | |
| 68 | XJCK-00138 | BRAKE VALVE | 1 | |
| 69 | XJCK-00003 | PLUG | 2 | |
| 70 | XJCK-00001 | O-RING | 2 | |
| 71 | XJCK-00076 | PLUG-EXPANDER | 1 | |
| 72 | XJCK-00075 | PLUG | 4 | |
| 73 | XJCK-00074 | PLUG | 1 | |
| *-2 | @ | FUEL INJECTION PIPE & NOZZLE SEE 4130 | 1 |
1. If I only know the excavator model , but can not offer parts No., what should I do ?
If possible, you can send us pictures of old products, nameplate or the size for reference.
2. What is the warranty of the parts after I purchased ?
The warranty is 6/12 Months based on the item details .
3. How can I pay the order ?
We can receive payment through T/T , Western Union, Paypal(for small amount) , trade assurance .
4. When will get the items after I place order?
Once your payment is confirmed, we will arrange the goods within 24 hours; if not in stock , we will inform you before placing the order .
5. How can I do if there is something wrong with the items ?
First of all , I have confidence in the quality of our products , if you really found something wrong , pls provide pictures for us and we will check . After it is confirmed, pls return to us , we will offer the correct item.
6. What is your main products ?
We are specialized in the excavator spare parts , such as travel motor gearbox/ass’y/parts , swing gearbox/ass’y/motor/parts , hydraulic pump assy/parts and gear parts . If you need other excavator parts , we also can supply as your requirements
Standard Carton Box