165-6767 Plunger Pump For CAT D350E articulated hauler

165-6767 Plunger Pump For CAT D350E articulated hauler Featured Image
  • 165-6767 Plunger Pump For CAT D350E articulated hauler

Short Description:

79914144 hydraulic double gear pump is aftermarket replacement spare part for CASE 580 backhoe loader, compatible with 580N,580SN,580L,580M,580SL,580SM.

Product Detail

Product Tags

description

165-6767 axial variable piston pump serves as main hydraulic power unit for CAT D350E articulated hauler, driven by 3406E engine. It converts mechanical power into adjustable high-pressure hydraulic energy for body hoist, steering and brake assist hydraulic systems. Built-in load sensing control valve dynamically changes pump displacement. During heavy payload dumping or low-speed steering, pump increases flow to maintain stable hoisting and steering speed; under light load or highway traveling, it reduces displacement to save fuel and lower heat accumulation.
Internal plungers, cylinder block, valve plate and slipper assemblies are made of high-strength alloy steel with precision grinding and surface hardening treatment. Cast iron pump housing adopts stress relief annealing to eliminate casting residual stress, resisting vibration and solid particle contamination in open-pit mines and quarries.High-performance FKM fluorine rubber sealing assembly delivers reliable high temperature resistance and anti-aging property, reducing internal volumetric leakage and external oil seepage.

product parameters

Part No：165-6767（Interchangeable 0R-7949）
Product Type：Variable Displacement Axial Piston Pump
Applicable Equipment：CAT D350E Articulated Hauler, compatible with D400E Series II, 3406E engine
Control Mode：Load Sensing Swash Plate Control
Displacement：72 cc/rev
Nominal Working Pressure：30 MPa (300 bar)
Max Instantaneous Peak Pressure：35 MPa (350 bar)
Rated Rotation Speed：2200 rpm
Max Allowable Rotation Speed：2500 rpm
Working Temperature Range：-20℃ ~ +115℃
Main Material：Cast iron housing, high-strength alloy steel internal parts, FKM fluorine rubber seal
Surface Treatment：Precision grinding, surface hardening, stress relief annealing, anti-rust coating
Packaging：Independent anti-rust packaging + export wooden case
Storage Environment：Dry indoor storage, moisture-proof, impact-proof, anti-corrosive gas

advantage

- Load sensing response optimized for mining heavy payload haul & dump cycle
The load sensing curve is tuned for mine hauling duty. It rapidly boosts output flow when lifting fully loaded body, maintaining stable hoisting speed under heavy stone and ore payload.
- Reinforced pressure-resistant housing withstands shock from rough mine road vibration
Thickened cast pump body improves rigidity, resisting cyclic pressure shock caused by bumpy haul road and frequent full-load dumping operation.
- Reasonable multi-circuit flow distribution for simultaneous hoist and steering operation
Balanced oil supply enables body lifting and steering to work at the same time, improving working efficiency during site unloading and positioning.
- Optimized wear-resistant friction pair for long-duration continuous mine shift
Upgraded internal friction pair improves wear resistance under 24-hour cyclic heavy-duty transport, extending service life in non-stop mining operation.
- Stable pressure holding performance prevents body sagging during partial unloading
Reliable pressure retention keeps the dump body steady at intermediate lifting position, convenient for controlled layered material discharging.
- Mine haul-dump cycle bench test simulating open-pit mining heavy transport conditions
Each pump undergoes long-cycle heavy haul and dumping test, verifying stable performance under continuous ore and rock transportation.

FAQ 

Q1: Which machine does 165-6767 / 0R-7949 plunger pump fit?
A1: This hydraulic plunger pump fits CAT D350E articulated hauler, compatible with D400E Series II with 3406E engine. Confirm machine serial number before purchase.

Q2: What hydraulic functions does this pump support?
A2: It provides high-pressure hydraulic oil for dump body hoist, steering and brake assist system, completing ore, rock and bulk earth hauling and dumping in open-pit mines.

Q3: What are typical failure symptoms of worn pump?
A3: Typical symptoms: insufficient hoisting force under full payload, slow body lifting speed, body sinking gradually when holding position, obvious heat rise during continuous hauling, pump abnormal noise under high pressure, shaft seal oil leakage.

Q4: What inspections should be done before installing new pump?
A4: Inspect hoist cylinders, steering cylinder, main control valve and filter elements. Fully flush hydraulic tank and pipelines to remove metal debris. Replace degraded hydraulic oil before assembly.

Q5: Why hauler still has weak lifting capacity after pump replacement?
A5: The fault may not come from pump. Check relief valve calibration, stuck valve spool, clogged filter, damaged cylinder seals or trapped air inside hydraulic circuit. Air bleeding must be completed after installation.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.

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Pack and ship

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