AT302662 RM100202 Hydraulic Pump Without Auxiliary Mount Replacement for John Deere 670D, 672D, 770D, 772D, 870D, 872D

• Precise fit, flexible installation: Designed without an integrated mounting bracket, it directly interfaces with the original machine's support structure. This adapts to installation needs across various maintenance scenarios, particularly when the original mounting bracket remains undamaged, reducing replacement part costs.
• Powerful Performance, Efficient Operation: High-pressure, high-flow output ensures rapid response and robust force for blade lifting, dozer blade tilting, and other movements. Restores the grader's heavy-duty leveling efficiency, preventing precision loss due to insufficient power.
• Durable and reliable with extended lifespan: High-strength configuration featuring a ductile iron pump body and alloy steel gears delivers superior resistance to contaminants and vibrations, withstanding continuous operation in harsh conditions. High-pressure resistant seals effectively prolong trouble-free operation time.
• Outstanding cost-performance ratio: Third-party CWL replacement parts cost approximately 1/2 to 2/3 of new OEM pumps, backed by a 1-year warranty, balancing repair costs with operational reliability.

1. What is the difference between AT302662 and RM100202? Are they interchangeable?
Both are interchangeable parts with identical specifications. They differ only in production batch or supplier codes. Core parameters (pressure/flow rate, shaft diameter, mounting hole positions) and compatible machine models are fully consistent. The auxiliary mounting bracket structure is identical, allowing direct interchange without modifying piping or brackets.

2. Which John Deere motor grader models does this pump fit? How does it differ from AT302661/RM100201?

Compatible with 670D, 672D, 770D, 772D, 870D, 872D; The core difference from AT302661/RM100201 is the absence of an auxiliary mounting bracket. The original machine's mounting bracket must be reused. Additionally, this pump is not compatible with G-series graders such as 670G/672G/770G/772G/870G/872G.

3. How to assess the quality of this pump replacement part?
Verify the part number and compatibility markings; inspect the pump body (ductile iron), gears (42CrMo alloy steel, quenched), and seals (high-pressure resistant fluororubber); choose brands offering warranty to avoid premature wear or leakage due to inferior materials.

4. What preparations are required before installing a new pump?
Drain residual system pressure. After removing the old pump, clean pipe connections, filters, and the oil tank. Replace hydraulic oil 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 accuracy.

5. What are the critical steps for the first startup of a new pump?
First, manually prime and bleed the system: Add hydraulic oil through the oil port, rotate the drive shaft 3-5 turns to expel air, preventing dry running. Idle for 15-20 minutes, inspect for leaks or abnormal noises, test the smoothness of actions like blade scraping and steering, and confirm pressure and flow meet specifications before commencing operation.

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: Pumps without auxiliary mounting brackets are easier to install and require no coaxiality checks. Correction: Coaxiality deviations cause bearing wear, seal failure, and abnormal noise. Calibration is mandatory during installation, with components tightened to specified torque values and in correct sequence.
• Misconception: New pumps can be started without initial oil filling. Correction: Manual oil filling and purging is mandatory. Failure to do so causes internal dry-running, drastically shortening service life.
• Misconception: Mixing hydraulic fluids is acceptable. Correction: Blending different brands/types may degrade performance and damage seals. Use John Deere-specific fluid or SAE 10W-40 anti-wear hydraulic oil.