AT302661 RM100201 Hydraulic Pump With Auxiliary Mount Replacement for John Deere Graders 670D, 670G, 672D, 672G, 770D, 770G, 772D, 772G, 870D, 870G, 872D, 872G

• Easy installation, precise fit: Integrated design with auxiliary mounting bracket eliminates the hassle of separately adapting mounting brackets. Hole positions and shaft diameters perfectly match OEM specifications, requiring no specialized modifications. Maintenance personnel can quickly complete disassembly and assembly.
• Powerful Performance, Efficient Operation: High-pressure, high-flow output ensures rapid response and ample force for blade lifting, tilt, and other movements. Meets the heavy-duty leveling demands of motor graders, restoring overall machine efficiency.
• Durable and Reliable, Long Service Life: High-strength materials and precision machining deliver strong resistance to contaminants and vibrations, adapting to the harsh conditions of continuous motor grader operation and reducing failure rates. Auxiliary mounting brackets absorb vibrations, further extending the lifespan of pump-to-engine connection components.
• Outstanding Value: Third-party replacement parts from suppliers like CWL cost approximately 1/2 to 2/3 of new OEM pumps, backed by warranty coverage. This balance prioritizes both maintenance costs and operational reliability.

1. What is the difference between AT302661 and RM100201? Are they interchangeable?
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.

2. Which John Deere motor grader models are compatible with this pump?
Compatible with the full series of John Deere 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.

3. How to assess the quality of AT302661/RM100201 replacement parts?
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 (cwl) to avoid premature failure from low-cost substandard parts.

4. What preparations are required before installing a new pump?
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.

5. What are the critical steps for the first startup of a new pump?
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.

6. How to quickly diagnose abnormal noises during pump operation?
Noises typically result from: ① Misalignment between drive shaft and coupling—recalibrate; ② Abnormal hydraulic oil viscosity or air bubbles—replace with compatible oil and bleed air; ③ Gear/plunger wear or bearing damage—disassemble and replace damaged components; ④ Air trapped inside the pump; refill with oil and bleed air.

7. How does routine maintenance extend pump lifespan?
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.

8. How to handle pump failure?
Immediately cease operation, diagnose the cause, and distinguish between user damage and manufacturing defects; contact the supplier or after-sales service, providing fault photos and operation logs to request warranty coverage or repairs; replace with a spare pump for severe failures to avoid prolonged equipment downtime.

Common Misconceptions and Precautions

• Misconception: New pumps can be started without priming. Correction: Manual priming and bleeding are mandatory; otherwise, internal components may dry-run, drastically shortening service life.
• Misconception: Bolts should be tightened as much as possible. Correction: Over-tightening may deform mounting brackets and cause seal failure, while under-tightening leads to leakage. Always use specified torque values.
• Misconception: Mixing hydraulic fluids does not affect performance. Correction: Combining different brands/types of oil may degrade performance and damage seals. Use John Deere-specific oil or SAE 10W-40 anti-wear hydraulic fluid.