136-8869 Vibratory Motor For Caterpillar CS-531 Grader

136-8869 Vibratory Motor For Caterpillar CS-531 Grader Featured Image
  • 136-8869 Vibratory Motor For Caterpillar CS-531 Grader

Short Description:

165-6767 (replacement part number 0R-7949) variable axial plunger pump is aftermarket spare part for CAT D350E articulated hauler, compatible with D400E Series II with 3406E engine.

Product Detail

Product Tags

description

136-8869 axial piston vibratory motor serves as core vibration power unit for CAT CS-531 compactor, driven by hydraulic pump. It converts hydraulic pressure energy into rotary mechanical power to excite the vibratory drum. Precision piston and cylinder block assembly generates constant torque and stable vibration frequency. During asphalt or subgrade compaction, the motor maintains steady vibration amplitude; under light travel condition, it reduces heat generation when vibration is switched off. Internal pistons, valve plate and slipper assemblies adopt high-strength alloy steel with precision grinding and surface hardening. Cast iron housing adopts stress relief annealing to eliminate casting residual stress, resisting continuous vibration fatigue and solid particle contamination on road construction sites. 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：136-8869
Product Type：Fixed Displacement Axial Piston Vibratory Hydraulic Motor
Applicable Equipment：CAT CS-531 Vibratory Compactor, compatible with CS-531C, CS-533C, CS-533D, CS-533E, CP-533E, 3116 engine
Control Mode：Fixed displacement piston structure
Displacement：42 cc/rev
Nominal Working Pressure：28 MPa (280 bar)
Max Instantaneous Peak Pressure：33 MPa (330 bar)
Rated Rotation Speed：2100 rpm
Max Allowable Rotation Speed：2400 rpm
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-20℃ ~ +110℃
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
Interchangeability：1:1 OEM interchangeable, direct bolt-on installation
Product Condition：Brand new aftermarket part, 100% hydraulic bench tested

advantage

- Optimized vibration frequency stability for multi-layer asphalt compaction
Precision friction pair keeps vibration frequency consistent during repeated rolling passes, guaranteeing uniform compaction density on asphalt and subgrade layers.
- Anti-fatigue heavy cast housing withstands continuous high-frequency cyclic vibration
Thickened cast body is specially designed for vibratory roller duty, resisting long-time cyclic fatigue load from high-frequency drum excitation.
- Stable torque output maintains constant amplitude under varying ground resistance
Consistent torque prevents amplitude drop when rolling over hard base or uneven ground, avoiding uneven compaction on road surface.
- Low pulsation design reduces hydraulic shock during vibration ON/OFF switching
Refined internal flow path suppresses pressure spike when activating or deactivating vibration, protecting hydraulic valves and hoses from impact damage.
- Direct bolt-on replacement matches original mounting and port layout
Fully consistent with OEM installation dimensions and oil port arrangement, no modification required, shortening road construction downtime.

FAQ 

Q1: Which machine does 136-8869 vibratory motor fit?
A1: This hydraulic axial piston vibratory motor fits CAT CS-531 vibratory compactor, compatible with CS-531C, CS-533C, CS-533D, CS-533E, CP-533E with 3116 engine. Confirm machine serial number before purchase.

Q2: What hydraulic function does this motor support?
A2: It provides rotary power for compactor drum vibration system, used for subgrade compaction, asphalt pavement rolling and site ground leveling in road projects.

Q3: What are typical failure symptoms of worn motor?
A3: Typical symptoms: insufficient vibration force, fluctuating vibration frequency during rolling, obvious vibration noise under high pressure, temperature rise after long continuous compaction, shaft seal oil leakage.

Q4: What inspections should be done before installing new motor?
A4: Inspect vibratory circuit control valve, hydraulic hoses and filter elements. Fully flush hydraulic tank and pipelines to remove metal debris. Replace degraded hydraulic oil before assembly.

Q5: Why compactor still has weak vibration after motor replacement?
A5: The fault may not come from motor. Check relief valve calibration, stuck valve spool, clogged filter, damaged 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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