D1105 Valve 1G673-13112 1G673-13122 Valve Seat 16241-36930 Valve Guide 16241-13540 for Kubota Mini

Product Details

Product Overview

This comprehensive valve train component set is specifically designed for the Kubota D1105 diesel engine, a powerplant commonly found in mini excavators, compact tractors, and other light construction equipment. The set includes intake/exhaust valves (part numbers 1G673-13112 and 1G673-13122), valve seats (16241-36930), and valve guides (16241-13540), providing everything needed for a complete cylinder head overhaul.

Manufactured to OEM specifications by, these components are precision-engineered to restore compression, reduce oil consumption, and eliminate valve noise in your Kubota-powered machinery. Whether you are rebuilding a mini excavator engine or performing preventive maintenance on a generator set, this kit ensures reliable, long-lasting performance.

Please verify your engine model and existing part numbers before ordering. While designed for the D1105, these components may also be compatible with other Kubota engine variants using the same valve train architecture. Cross-reference with your service manual or existing parts for fitment confirmation.

Key Features & Benefits

• Complete Overhaul Solution: Includes valves, seats, and guides in one convenient set – no need to source individual components separately.
• OEM-Spec Dimensions: Manufactured to original Kubota tolerances for direct bolt-in replacement without modification.
• Precision-Machined Valve Seats: 16241-36930 seats feature hardened alloy construction for superior wear resistance and consistent sealing under high-temperature operation.
• Durable Valve Guides: 16241-13540 guides provide optimal stem clearance to reduce oil consumption and prevent valve sticking in dusty construction environments.
• Stellite-Faced Valves: Intake (1G673-13112) and exhaust (1G673-13122) valves feature hardened face coatings for extended service life in diesel applications.
• Rigorous Quality Control: Each component undergoes dimensional inspection and surface finish verification before packaging.
• Cost-Effective Alternative: Premium aftermarket quality at a fraction of dealer pricing, ideal for fleet maintenance and rebuild shops.

Technical Specifications

OEM Cross-Reference

This set directly replaces the following genuine Kubota part numbers:

• Valves: 1G673-13112 (Intake), 1G673-13122 (Exhaust)
• Valve Seat: 16241-36930
• Valve Guide: 16241-13540

Note: These numbers correspond to Kubota’s standard valve train configuration for the D1105. Always verify your cylinder head casting number and existing component dimensions before installation.

Compatibility

This valve set is specifically designed for the Kubota D1105 3-cylinder diesel engine. It is commonly used in the following applications:

• Mini Excavators: Kubota U17, U20, KX41, KX61 series
• Compact Tractors: Kubota B1700, B2100, B2400 series
• Construction Equipment: Skid steer loaders, backhoes, and trenchers powered by D1105
• Industrial/Agricultural: Generators, pumps, and tillers with D1105 engines
• Marine: Small auxiliary engines and generator sets

Fitment is inferred based on engine model compatibility. Always confirm with your equipment’s service manual or existing part numbers.

Global Supply & Distribution

We maintain extensive stock of D1105 valve train components in our Guangdong, China warehouse, enabling rapid fulfillment for international buyers. Our logistics network supports:

• Fast Shipping: DHL, FedEx, UPS, and air freight for urgent orders (3-7 days to major cities)
• Sea Freight: Economical LCL/FCL options for bulk orders to ports worldwide
• Key Markets: North America (Los Angeles, Houston, Toronto), Europe (Rotterdam, Hamburg, Felixstowe), Asia-Pacific (Singapore, Sydney, Tokyo), Middle East (Dubai, Jeddah)
• Trade Compliance: All shipments include commercial invoices, packing lists, and certificates of origin for smooth customs clearance
• Volume Discounts: Competitive pricing for rebuild shops, equipment dealers, and fleet operators

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001-certified facilities with strict dimensional tolerances (±0.01mm on critical surfaces)
• Testing: 100% visual inspection plus random sample testing for hardness, surface finish, and concentricity
• Video Inspection: Outgoing inspection video available upon request for quality verification
• Warranty: 6-month warranty against manufacturing defects in materials and workmanship
• Traceability: Each batch is lot-numbered for complete traceability from raw material to finished product

FAQ

Q1: Will these valves fit my Kubota D1105 engine without modification?

Yes, these are direct OEM-replacement components manufactured to original Kubota specifications. The valves, seats, and guides are standard size and require no machining if your cylinder head is within factory tolerances. However, we recommend measuring your existing valve guide bore and seat width to confirm compatibility, especially if your engine has been previously rebuilt with oversized components.

Q2: What is the recommended installation procedure for valve guides?

Valve guides should be pressed into the cylinder head using an arbor press or hydraulic press. Ensure the head is heated to approximately 80-100°C (176-212°F) and the guides are chilled to ease installation. After installation, ream the guide bore to the correct stem clearance (typically 0.03-0.07mm for intake, 0.05-0.09mm for exhaust). Always use new valve seals during assembly to prevent oil leakage.

Q3: How do I verify correct valve seat contact after installation?

After installing new seats and valves, perform a Prussian blue or marking compound test. Apply a thin layer to the valve face, insert the valve, and rotate it 90 degrees under light spring pressure. Remove the valve and inspect the seat contact pattern – it should be a continuous band approximately 1.5-2.0mm wide centered on the seat insert. If the pattern is too narrow, too wide, or eccentric, the seat may require light cutting or lapping to ensure proper sealing.