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AT302661/RM100201 Replacement Hydraulic Pump with Auxiliary Mounting Bracket serves as the core power component for 670/770/870 series motor graders. Its core value lies in integrated installation, precise compatibility, robust power, and durable reliability. It rapidly restores motor grader hydraulic system performance, ensuring efficient grading operations. When purchasing, verify the machine model and part number. After installation, strictly follow the commissioning procedures. Regularly maintain the hydraulic oil and filter elements to effectively extend the service life of the pump and hydraulic system.
| Part Name | Hydraulic Pump With Auxiliary Mount | Part Number | AT302661/RM100201 |
| Product Type | High-pressure integrated hydraulic pump | Origin | China |
| Weight | 74.8 lb | Height | 6.5 in |
| Width | 11 in | Length | 14 in |
| Compatible Equipment | Graders/Land Levellers | ||
| Compatible Model | 670D, 670G, 672D, 672G, 770D, 770G, 772D, 772G, 870D, 870G, 872D, 872G | ||
| Core Usage |
1. Provides hydraulic power to the bulldozer's core working tools (blade, scraper) to enable lifting, tilting, and leveling operations; 2. Supplies stable pressure to the steering system, ensuring agile and precise steering; 3. Supports power output for auxiliary hydraulic devices; 4. Assists the mounting bracket in achieving rigid connection between the pump body and engine, reducing operational vibration. |
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| Application | Heavy-duty, continuous operation scenarios such as highway subgrade leveling, mine site grading, farmland land improvement, and municipal road maintenance. | ||
| Related Model | AT302662/RM100202 Hydraulic Pump Without Auxiliary Mount | ||
Both are interchangeable parts with identical specifications and are compatible with the exact same machine models. They differ only in production batch or supplier codes. Mounting hole positions, shaft diameters, pressure/flow parameters, and auxiliary mounting bracket specifications are identical. They can be directly swapped without requiring adjustments to piping or brackets.
Compatible with the full series of 670D, 670G, 672D, 672G, 770D, 770G, 772D, 772G, 870D, 870G, 872D, and 872G motor graders. Can directly replace the original equipment pump without additional modifications.
Prioritize verifying part numbers and compatibility markings; inspect pump body material (ductile iron), core component hardness (42CrMo alloy steel quenched), and seal type (high-pressure resistant fluororubber); select brands offering warranty to avoid premature failure from low-cost substandard parts.
Drain residual pressure from the hydraulic system. After removing the old pump, clean all pipe connections, filters, and the reservoir. Replace hydraulic fluid and filter elements to prevent contaminants from entering the new pump. Prepare tools like torque wrenches and follow the original manufacturer's maintenance manual to ensure installation precision.
Manual oil filling and air purging: Fill hydraulic oil through the oil port, rotate the drive shaft 3-5 turns to expel air and prevent dry running. Idle run for 15-20 minutes to check for leaks or abnormal noises. Test the smoothness of actions like blade scraping and steering. Only commence operation after confirming pressure and flow meet specifications.
Replace hydraulic oil and filters every 500-1000 operating hours to maintain oil cleanliness; regularly inspect connections and seals, tightening or replacing as needed; avoid prolonged overload operation to prevent pump overheating; never mix different brands/types of oil to prevent performance degradation and seal damage.
