A standard excavator that swings or travels slowly, whines under load or leaks oil from the travel reduction hub is usually telling you the PC300-7 Travel Drive has reached the end of its service life. Worn planet gears, a scored ring gear and a failed bearing set all waste torque before it reaches the track or the upper structure. RITO supplies this PC300-7 Travel Drive as a ready-to-fit assembly, so the machine is back to full tractive effort and travel speed without a rebuild.
Item NO.:
PC300-7Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In StockPC300-7 Travel Drive is a complete reduction assembly for the travel circuit of standard excavators. The housing carries the ring gear and bearing bores in one rigid casting, the planet carriers run on caged bearings, and the output shaft is splined to match the original interface, so the unit drops into the existing mounting pattern without modification. Every assembly is checked for backlash, turning torque and seal integrity before it leaves the line.
| Part Number | PC300-7 |
| Part Name | Travel Drive |
| Compatible Brand | Komatsu |
| Applicable Models | PC300-7 |
| Application | Excavator travel drive assembly for the undercarriage |
| Material | Cast iron housing with hardened alloy steel gear set |
| Product Color | Industrial grey / OEM color |
| Working Temperature | -25°C~+80°C |
| Key Function | Converts hydraulic flow into tractive effort |
| Condition | 100% New |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
 | Hardened Internals Gears and shafts are case hardened and ground, giving a tooth surface that resists pitting under the shock loads typical of excavator travel and swing duty. |
 | Rigid Cast Housing The ring gear and bearing bores sit in one casting, holding bore alignment under load so the gear mesh does not walk out of position. |
 | Tested Before Packing Each unit is checked for backlash, turning torque and seal integrity, then packed in a reinforced case to survive international freight. |
 | Complete Assembly Ring gear, planets, carriers, bearings, seals and output shaft arrive as one unit, so nothing is reused from a worn original. |
Q: Is this a complete assembly or just the gear set?
A: It is supplied as a complete reduction assembly - housing, ring gear, planet gears, carriers, bearings, seals and output shaft - so nothing has to be transferred from the old unit.
Q: How do I confirm this PC300-7 unit fits my machine?
A: Compare the mounting bolt pattern, the output spline and the overall height against the unit on your machine, and check the model plate. If the numbers differ, send us a photo of the plate and we will confirm the correct variant.
Q: What usually causes these reduction units to fail?
A: Contaminated oil and lost bearing preload. Once dust enters through a worn seal, the bearings loosen, the gear mesh misaligns and the unit starts to whine and overheat within a few hundred hours.
Q: Do I need to adjust backlash after fitting?
A: No. Backlash and bearing preload are set at assembly. Fit the unit, fill with the specified oil grade, and check for leaks after the first few hours of operation.
Q: Which oil should I use after installation?
A: Use the grade listed in the machine service manual for the final drive or swing reduction. Overfilling causes heat; underfilling causes immediate bearing damage, so fill to the level plug.
Q: Can this unit be used as an upgrade on an older machine?
A: Where the mounting pattern and spline match, the later specification can be fitted to earlier machines. Confirm the interface dimensions with us before ordering.
Q: Why Choose RITO?
A: Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
This RITO 423-20-32621 Universal Joint Spider Assembly is a key transmission component for Doosan DH200, DH220, and DH225 excavators, designed to transfer torque between shafts at varying angles. It ensures smooth power transmission, flexible movement, and stable performance in demanding construction environments.
View More
This RITO Excavator Bushing Sleeve for Solar 170LC-3 is a critical wear-resistant component designed to support pin-to-bore connections in excavator structures. It ensures proper alignment, reduces friction, and maintains stable movement of key parts such as the boom, arm, and bucket in construction environments.
View More
Hydraulic drift and pressure drops in Komatsu excavators often signal a failing control valve, leading to sluggish cycles and dangerous load slippage. In high-stakes mining, the 708-2L-07412 solves these critical instabilities, preventing the massive revenue loss caused by machine downtime.
View More
The RITO Hydraulic Fan Motor Gear Pump 708-7W-00021-OT is a high-performance hydraulic fan motor and gear pump motor designed to optimize the fan system for excavators. This essential component is engineered to provide efficient cooling, ensuring that the excavator's engine operates at an optimal temperature, even in the most demanding conditions. The 708-7W-00021-OT is specifically designed to withstand high torque and pressure, providing reliable performance in both construction and mining industries. Available for wholesale and bulk purchasing, this fan motor and pump combination is perfect for maintaining high-efficiency excavator systems, reducing downtime, and improving overall productivity.
View More
Excessive joint play and "oval" wear in excavator booms lead to dangerous instability and structural cracking. Standard bushings often fail under the extreme impact of mining tasks, causing catastrophic pin seizure. The 20Y-70-31512 addresses these high-stress points, preventing the massive repair costs that paralyze your PC200-8M0 fleet.
View More
Loose joints and excessive play lead to premature pin wear and costly linkage damage. Unstable gaps in excavator arms cause operational inaccuracy and safety risks. The 423-23-31570 provides a precision solution. This heavy-duty Shim Spacer eliminates gap issues and restores equipment stability.
View More
Exposed rear axles are vulnerable to debris impact, leading to costly structural damage and downtime in harsh construction sites. Minor hits cause major mechanical failures under heavy loads. The 418-22-21310 provides a high-strength shield. This Protector Guard Cover ensures ultimate axle safety.
View More
Inconsistent swing motion or gearbox wear in excavators leads to poor machine rotation and operational delays.
View MoreLeave A Message
Scan to wechat :
