Product Parameter Table
| Parameter | Specification |
|---|---|
| Product Name | Komatsu Engine Pump Drive Assembly / PTO Gearbox |
| Part Number | 235-06-45233 |
| Brand | COGENG (Premium Aftermarket Replacement) |
| Condition | Brand New / Remanufactured Option Available — 100% Performance Tested |
| Component Type | Engine-Mounted Power Take-Off (PTO) Gearbox — Hydraulic Pump Drive Transmission |
| Compatible Equipment | Komatsu Hydraulic Excavators and Wheel Loaders (Model Verification Required by Serial Number) |
| Function | Transmits Mechanical Rotational Power from the Engine Flywheel to the Hydraulic Main Pump(s) via Precision-Geared Power Transfer |
| Construction | High-Strength Cast Iron Housing; Case-Hardened Helical / Spur Gear Set; Heat-Treated Alloy Steel Input and Output Shafts; Heavy-Duty Tapered Roller Bearings |
| Drive Configuration | Single or Multiple Output Pads (SAE Standard Configurations) for Tandem Pump Mounting |
| Input Type | Direct Engine Flywheel Coupling via Splined Hub or Flexible Coupling Disc |
| Output Type | SAE Standard Mounting Flanges and Splined Drive Shafts for Hydraulic Pump Input |
| Maximum Input Torque | OEM-Specified Maximum Engine Torque Capacity (Model Dependent) |
| Maximum Input Speed | OEM-Specified Maximum Engine Speed (Typically 2,200-2,600 RPM) |
| Lubrication | Splash / Forced Lubrication via Engine Oil Circuit or Dedicated Oil Fill (Configuration Dependent) |
| Hydraulic Fluid / Oil Compatibility | Engine Oil or Hydraulic Oil per Komatsu Specification |
| Quality Assurance | 100% Dimensional Inspection; Gear Tooth Contact Pattern Verification; Bearing Preload Verification; Rotational Torque and Backlash Measurement |
| Certification | ISO 9001 Certified Manufacturing Facility |
| Place of Origin | Guangdong, China |
| Supply Capacity | 100 Pieces per Month |
| Shipping Weight | 45 – 80 kg (Gross, Configuration Dependent) |
| Package Dimensions | 60 x 50 x 40 cm (Heavy-Duty Crating) |
| Packing | Inner: VCI Anti-Corrosion Bag; Outer: Reinforced Export-Grade Wooden Crate with Steel Banding, Silica Gel Desiccant Packs |
| Payment Terms | Western Union, L/C, T/T, MoneyGram |
| Shipping Mode | By Air, By Sea, By Express (FedEx, UPS, DHL, TNT) |
| Minimum Order Quantity | Acceptable Trial Order |
| Return Policy | Non-Returnable / Non-Exchangeable (Comprehensive DOA Guarantee Included) |
PRODUCT OVERVIEW
The COGENG Pump Drive Assembly, part number 235-06-45233, is a precision-engineered, heavy-duty power transmission component designed as a direct, form-fit-function replacement for the engine-mounted Power Take-Off (PTO) gearbox on a range of Komatsu hydraulic excavators and wheel loaders. This critical component serves as the mechanical bridge between the machine's diesel engine and the hydraulic system's main pump. Its primary function is to transmit the engine's rotational power from the flywheel to the hydraulic pump's input shaft with precise speed ratio, perfect alignment, and robust torque capacity, enabling the pump to generate the high-pressure hydraulic fluid flow that powers every implement function of the machine.
The pump drive assembly is mounted directly to the engine flywheel housing or rear engine face, and the hydraulic main pump is in turn mounted directly to the PTO's output face. This stacked mounting configuration—engine, pump drive, hydraulic pump—forms the machine's core power generation unit. The pump drive contains a precision gear set that transfers power from the input shaft, which is coupled to the engine flywheel via a splined hub or flexible coupling disc, to one or more output shafts that drive the hydraulic pump sections. Many Komatsu pump drive assemblies are configured with multiple output pads, allowing a single PTO to drive both the main implement pump and an auxiliary pump for the swing circuit, cooling fan, or pilot control system. The gear ratios within the PTO are carefully engineered to operate the hydraulic pump at its optimal speed range, matching the engine's torque curve to the pump's flow and pressure requirements for maximum overall system efficiency.
The operating environment for a pump drive assembly is exceptionally demanding. The PTO is subjected to the full torque output of the engine, with continuous torsional loads and dynamic shock loads when hydraulic functions are actuated rapidly or when a loaded cylinder stalls. The internal gears and bearings operate at high speed under constant load, generating heat and requiring reliable lubrication. The housing must maintain precise alignment between the engine flywheel and the hydraulic pump input shaft while withstanding the continuous vibration of the engine and the structural loads transmitted through the pump mounting. Failure of the pump drive assembly—whether through gear tooth wear, bearing failure, input shaft spline wear, or housing cracking—results in a complete loss of hydraulic power, rendering the machine inoperable. COGENG's 235-06-45233 pump drive assembly is manufactured using premium materials and processes: a high-strength cast iron housing that provides structural rigidity and noise damping; case-hardened, precision-ground gear teeth that offer exceptional wear resistance and load-carrying capacity; heat-treated alloy steel shafts for high fatigue strength; and heavy-duty tapered roller bearings selected for maximum service life under combined radial and thrust loads. Each assembly undergoes complete dimensional inspection, gear tooth contact pattern verification, and bearing preload measurement before shipment.
COMPATIBLE EQUIPMENT
The 235-06-45233 pump drive assembly is used on multiple Komatsu equipment platforms. Specific model and engine configuration verification is mandatory.
| Brand | Typical Model Applications | Machine Type |
|---|---|---|
| Komatsu | Multiple Dash-6 / Dash-7 / Dash-8 Series | Hydraulic Excavators, Wheel Loaders |
Note: To confirm exact compatibility, please provide the complete machine serial number, engine model, and the hydraulic pump assembly part number. A photo of the existing pump drive assembly is highly recommended for physical verification.
PARTS LIST (Included in Package)
-
Complete Pump Drive Assembly (1 unit): The fully assembled PTO gearbox, including the cast iron housing, input shaft with splined hub or coupling interface, gear set, output shaft(s) with splined drive, bearings, and all internal seals.
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Pre-Installed Input Shaft Seal: New OEM-specification input shaft seal installed to prevent oil leakage between the engine and the PTO.
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Pre-Installed Output Shaft Seals: New OEM-specification seals installed on all output shafts.
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Mounting Hardware Kit: OEM-specification bolts, washers, and alignment dowels required for mounting the PTO to the engine flywheel housing and for mounting the hydraulic pump to the PTO.
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VCI Anti-Corrosion Bag and Wooden Crate: The assembly is sealed in a Vapor Corrosion Inhibitor bag and packed in a reinforced export-grade wooden crate with steel banding.
DECOMPOSE PICTURES (VISUAL REFERENCE GUIDE)
Note: The following describes accompanying high-resolution product photographs.
Image 1: Complete Pump Drive Assembly — Isometric View
This photograph shows the entire 235-06-45233 PTO gearbox from a three-quarter angle. The image displays the heavy cast iron housing, the engine-side mounting face, the input shaft opening, the pump-side mounting face with the SAE standard output flange, and the overall robust construction.
Image 2: Input Side — Engine Coupling Interface
A detailed view of the input side of the pump drive. The image shows the precision-machined mounting face that mates with the engine flywheel housing, the input shaft with its splined hub or coupling disc mounting surface, and the pre-installed input shaft seal.
Image 3: Output Side — Pump Mounting Interface
A detailed view of the output side. The image shows the SAE standard mounting flange, the splined output shaft that drives the hydraulic pump input, and the precision pilot bore that ensures perfect pump alignment.
Image 4: Identification Plate and Markings
A photograph showing the pump drive's identification plate, including the stamped or laser-etched part number 235-06-45233, the COGENG brand logo, the gear ratio specification, and the manufacturing date code.
COMPATIBILITY NOTES: CRITICAL VERIFICATION GUIDE
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Serial Number Verification is Mandatory: This PTO is used on multiple Komatsu models with different engine flywheel housing configurations and pump mounting patterns. Always provide your complete machine serial number.
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Pump Compatibility: The output flange pattern, pilot bore diameter, and shaft spline configuration must match your existing hydraulic pump. Provide the pump assembly part number for cross-verification.
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Gear Ratio Confirmation: The internal gear ratio is critical for correct pump speed. Incorrect ratio can result in pump over-speed (damage) or under-speed (poor performance).
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Professional Installation Required: Installation requires alignment verification, correct torque specifications, and proper coupling procedures. This work should be performed by a qualified heavy equipment technician.
INSTALLATION PROCEDURE
Note: This is a summarized guide. Always follow the Komatsu service manual.
Step 1: Preparation and Removal
Disconnect batteries. Remove the hydraulic pump from the old PTO. Drain any oil from the PTO housing. Support the old PTO with a suitable lifting device. Remove the mounting bolts and carefully separate the PTO from the engine flywheel housing.
Step 2: Inspection and Cleaning
Inspect the engine flywheel housing for damage. Clean the mounting surface thoroughly. Inspect the engine coupling disc or splined hub for wear. Replace if necessary.
Step 3: New PTO Installation
Apply a light coating of grease to the input shaft splines. Carefully align and install the new COGENG PTO onto the engine flywheel housing. Install mounting bolts and torque to OEM specifications in the correct sequence.
Step 4: Pump Installation
Install the hydraulic pump onto the PTO output face, ensuring correct alignment of the splined shaft. Torque all mounting bolts to OEM specifications.
Step 5: Lubrication and Verification
Fill the PTO with the specified lubricant if it has a dedicated oil fill. Reconnect all components. Start the engine and monitor for unusual noise, vibration, or leakage. Verify correct hydraulic system operation.
🚚 SHIPPING DETAILS & RETURN POLICY
| Detail | Description |
|---|---|
| Shipping Methods | By Air, By Sea, By Express (FedEx, UPS, DHL, TNT) |
| Estimated Delivery Time | Based on carrier. Tracking provided within one business day. |
| Packing | VCI Anti-Corrosion Bag + Reinforced Wooden Crate |
| Payment Terms | T/T, L/C, Western Union, MoneyGram |
| Return Policy | Non-Returnable / Non-Exchangeable (DOA Guarantee Included) |
📞 CONTACT & ORDERING
For pricing, compatibility verification, or technical support, contact your COGENG supplier today.
✅ Direct OEM Replacement — Precision-Manufactured for Guaranteed Perfect Fit.
✅ Heavy-Duty Construction — Case-Hardened Gears, High-Strength Cast Iron Housing.
✅ In Stock — Ready for Immediate Worldwide Dispatch.
Critical Action: Please provide your machine model, engine serial number, and pump assembly part number for 100% compatibility confirmation.
Merchant Return Policy: All products are not returnable or exchangeable. Please verify compatibility before purchase.
