CATEngine Parts

311-9550 Hydraulic Axial Piston Motor — Cat C15

This is a high-performance hydraulic axial piston motor designed to convert hydraulic pressure into mechanical rotational force for driving equipment components. It is built to exacting OEM standards, offering superior durability and efficiency over a worn motor that may exhibit reduced torque or internal leakage. Observable symptoms of failure include sluggish operation, abnormal noises, overheating of the hydraulic fluid, and loss of drive power.

Hydraulic Axial Piston Motor – Part No 311-9550 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

const P = { partNo:'311-9550', name:'Hydraulic Axial Piston Motor', brand:'CAT', brandSlug:'cat', category:'Engine Parts', catSlug:'engine-parts', condition:'OEM Aftermarket', description:'This is a high-performance hydraulic axial piston motor designed to convert hydraulic pressure into mechanical rotational force for driving equipment components. It is built to exacting OEM standards, offering superior durability and efficiency over a worn motor that may exhibit reduced torque or internal leakage. Observable symptoms of failure include sluggish operation, abnormal noises, overheating of the hydraulic fluid, and loss of drive power.', xref:['311-9550'], models:["C15"], specs:[{key:'Part No',val:'311-9550'},{key:'Brand',val:'CAT'},{key:'Category',val:'Engine Parts'},{key:'Condition',val:'Aftermarket — OEM Specification'},{key:'Dispatch',val:'Same-day from Mumbai (before 3 PM IST)'},{key:'GST Invoice',val:'Available — all orders'},{key:'Export Docs',val:'Commercial invoice, packing list, COO'}], relatedParts:[{"partNo": "1099368", "name": "Engine Parts Component", "slug": "1099368"}, {"partNo": "170-9827", "name": "Bucket Cylinder Seal Kit", "slug": "170-9827"}, {"partNo": "4C4788", "name": "O-Ring Seal Kit Metric", "slug": "4C4788"}, {"partNo": "4d-4064", "name": "Bearing", "slug": "4d-4064"}, {"partNo": "285-1975", "name": "Wiring Harness", "slug": "285-1975"}, {"partNo": "7e-9798", "name": "Radiator", "slug": "7e-9798"}], reviews:[{name:'Vikram Singh',loc:'Delhi, India',rating:5,text:'CAT part arrived fast. OEM specification, fits perfectly in my 320D. Highly recommend PTC.'},{name:'Ibrahim Al Rashid',loc:'Dubai, UAE',rating:5,text:'Great service and fast shipping to UAE. The CAT part was exactly as described. Very reliable supplier.'},{name:'Pradeep Sharma',loc:'Nagpur, Maharashtra, India',rating:4,text:'Quick response, good quality. Team confirmed compatibility before dispatch which I appreciated.'}], faq:[{q:'What causes an axial piston motor to fail prematurely?',a:'Contamination in the hydraulic system is a primary cause of premature failure, leading to wear on internal components like pistons and valve plates.'},{q:'How do I confirm this motor is the correct replacement for my machine?',a:'Verify the part number and consult your equipment\'s service manual or a dealer to ensure compatibility with your specific machine\'s hydraulic system configuration.'},{q:'What is the expected performance difference between a new and a worn motor?',a:'A new motor will provide full rated torque and speed with minimal leakage, whereas a worn motor may exhibit reduced power, slower response, and increased heat generation.'},{q:'What maintenance is recommended for hydraulic motors?',a:'Regular hydraulic fluid analysis, filter changes, and checking for leaks are crucial for maintaining the health and longevity of hydraulic motors.'}], categoryDesc:'CAT Engine Parts from Parts Trading Company cover the full range of CAT equipment. We supply OEM-specification aftermarket engine parts sourced from certified manufacturers. PTC has supplied CAT engine parts to customers across India, UAE, Russia, Indonesia, and Africa since 1956. Our Mumbai warehouse stocks high-turnover CAT engine parts for same-day dispatch before 3 PM IST.', aiSpecs:[{"key": "Part Type", "val": "Hydraulic Axial Piston Motor"}, {"key": "Material", "val": "Hardened steel and aluminum alloy"}, {"key": "Application", "val": "Main hydraulic drive system"}, {"key": "Service Life", "val": "Replace as needed based on hydraulic system diagnostics"}, {"key": "Compatibility", "val": "CAT C15, 374DL, 365CL"}, {"key": "Condition", "val": "New \u2014 OEM specification aftermarket"}],};script src="/assets/js/product-page.js">

Related CAT Parts

From the same category — may also be needed

1099368
Engine Parts Component
170-9827
Bucket Cylinder Seal Kit
4C4788
O-Ring Seal Kit Metric
4d-4064
Bearing
285-1975
Wiring Harness
7e-9798
Radiator

Browse all CAT Engine Parts →

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Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India

Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeHydraulic Axial Piston Motor
MaterialHardened steel and aluminum alloy
ApplicationMain hydraulic drive system
Service LifeReplace as needed based on hydraulic system diagnostics
CompatibilityCAT C15, 374DL, 365CL
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing hydraulic motor include a noticeable decrease in the speed or power of the driven component. If ignored, the motor may begin to make unusual noises, overheat the hydraulic system, and eventually lose its ability to transmit power effectively. Continued operation risks significant downtime and potential damage to the hydraulic pump and other system components.

Installation Tip

Thoroughly flush the hydraulic system and replace the hydraulic filter before installing a new motor to prevent contamination from causing immediate damage. Ensure all hydraulic lines are properly connected and free of kinks to avoid restricting fluid flow.

Service Note

Inspect hydraulic pump performance, check hydraulic fluid condition, and replace hydraulic filters when servicing the axial piston motor.