161-4113 CAT C18 Engine Oil Pump Assembly

• OEM Part Number: 161-4113
• Alternative Part No: 8N8734
• Product Name: Engine Oil Pump Assembly
• Material: High Strength Cast Iron Body, Precision Internal Gear Components
• Compatible Engines: CAT C15, C16, C18, 3406B, 3406C, 3406E, 3408, 3408B, 3408C

1. Heavy-duty cast iron housing with integral pressure relief spring structure, stable oil pressure output under high load and high temperature working conditions
2. Precision machined internal gear pair ensures high volumetric efficiency, sufficient lubricant circulation for crankshaft, camshaft, bearings and valve train components
3. Built-in pressure regulating valve automatically controls system oil pressure, effectively prevents overpressure damage to engine lubrication pipeline
4. Strictly follows OEM 161-4113 dimensional specifications, direct bolt-on installation without extra machining modification

161-4113 engine oil pump is the core component of the CAT heavy-duty diesel engine lubrication system. It extracts engine oil from the oil sump and delivers pressurized lubricating oil to all moving friction pairs inside the engine, realizing lubrication, cooling, cleaning and sealing functions for crankshaft bearings, cylinder liners, piston assemblies and timing components.

Replace this oil pump during engine overhaul when symptoms like insufficient oil pressure, abnormal mechanical noise, internal gear wear and oil leakage occur. It is recommended to replace engine oil, oil filter and overhaul gasket kit synchronously to guarantee long-term stable operation.

We supply parts for Kubota, Cum mins, CAT, Perkins, Yanmar, Isuzu, Komatsu, Mitsubishi, Hino, Nissan, Vo lvo, Deutz, Doosan, Daewoo, John Dee re, Scania, Hyundai, JCB etc.

Shipping: Sea freight, air freight and international express are all available. Goods will be arranged for shipment promptly after payment confirmation.

Tax Notice: All import duties and local destination taxes shall be borne by the buyer. Please verify local customs regulations in advance.

1. What is the cross reference part number for this oil pump?

   Main OEM number is 161-4113, interchangeable with 8N8734 for CAT heavy-duty engines.

2. Which equipment can this 161-4113 oil pump be applied to?

   It fits CAT 988B wheel loaders, large mining trucks, industrial generator sets and excavators powered by C15/C18/3406/3408 series engines.

3. What problems will a failed engine oil pump cause?

   Low engine oil pressure warning, abnormal knocking noise, severe wear of crankshaft and bearings, even engine seizure and scrapping in serious cases.

4. Any installation suggestions for the oil pump?

   Clean the engine oil passage thoroughly before installation, replace the oil pump drive gear and sealing gaskets together, and test the idle and rated oil pressure after assembly.