OEM 61000135 Hexagon Flange Bolt – Genuine SANY Heavy-Duty Fastener Solution

The genuine SANY parts reference 61000135 is a high-strength hexagon flange bolt, a precision-engineered threaded fastener designed for critical bolted joints in SANY heavy-duty diesel engines. As a key component of the SANY Oil Pan Group, the 61000135 bolt is specifically used to secure structural retainers and oil pan assemblies, ensuring leak-proof sealing and exceptional clamping force under extreme vibration and dynamic loads. Manufactured from micro-alloyed chromium-molybdenum steel with rolled threads and an integrated large-diameter flange, the 61000135 hexagon flange bolt eliminates the need for a separate washer, reduces part count, and distributes bearing pressure evenly across the clamping surface. Each 61000135 unit is 100% inspected for dimensional accuracy, tensile strength, and surface integrity, guaranteeing reliable performance in SRT dump trucks, SY excavators, and SW wheel loaders.

As a vital fastening element within the SANY Oil Pan Group, the 61000135 Bolt, Hexagon Flange, Largen is supplied in a quantity of 10 units per engine assembly, working in concert with the Oil Pan Assembly (160102130004A016), the Oil Pan Sealing Gasket (160102130003A049), Retainer, Oil Pan components (60272589), and the Oil pan support block (160102130003A051). The integrated large-diameter flange of the 61000135 bolt distributes clamping force over a wider area, reducing bearing pressure on the clamped components and preventing gasket extrusion under high bolt loads. The serrated flange face also provides a locking effect that resists loosening under the high‑frequency vibrations typical of heavy machinery. Each 61000135 unit is 100% inspected for thread profile, flange geometry, and surface coating, guaranteeing reliable performance in the most demanding mining, construction, and material handling environments.

Bolt, Hexagon Flange, Largen

Bolt, Hexagon Flange, Largen

Bolt, Hexagon Flange, Largen

Metallurgical Design of Hexagon Flange Bolt 61000135

The hexagon flange bolt 61000135 is manufactured from chromium‑molybdenum alloy steel (42CrMo4 / AISI 4140 equivalent). The material is heat‑treated to achieve property class 10.9 according to ISO 898-1. This provides a minimum tensile strength of 1,040 MPa and a yield strength of 940 MPa. The micro‑alloyed chemistry ensures a uniform martensitic microstructure after quenching and tempering, delivering high load‑bearing capacity and ductility for fasteners subject to cyclic fatigue. The material composition is verified by spectrographic analysis for each production batch.

The threads of the 61000135 bolt are rolled after heat treatment, not cut. Rolling work‑hardens the thread flanks and induces beneficial compressive residual stresses at the thread roots, dramatically increasing the bolt’s fatigue endurance limit – critical for applications where the fastener experiences millions of alternating load cycles. The thread rolling also yields a smoother surface finish (Ra ≤ 0.8 µm), reducing friction scatter and ensuring consistent torque‑tension conversion during assembly.

The 61000135 bolt features an integrally forged large‑diameter flange that eliminates the need for a separate washer. The flange diameter is significantly larger than that of a standard hex head, reducing bearing pressure on the clamped material and preventing embedding into soft materials such as aluminum oil pans or gaskets. The underside of the flange is serrated, creating a locking effect that resists loosening under vibration. The bearing surface is manufactured flat and perpendicular to the thread axis to distribute clamp load evenly. A small pilot chamfer guides the bolt into the threaded hole and protects the threads from cross‑threading damage. The bolt head is typically marked with the SANY logo and property class identification for easy verification during service.

A mechanically applied zinc‑nickel coating (blue passivated) protects the 61000135 bolt from corrosion in humid, salty, or chemically contaminated environments. This plating system provides ≥100 hours of salt spray resistance per ASTM B117 and eliminates the risk of hydrogen embrittlement that can affect electroplated high‑strength fasteners. The coating also provides a stable friction coefficient of 0.12‑0.16 when lubricated with engine oil, ensuring consistent clamp load versus torque relationships.

All 61000135 bolts are 100% inspected for dimensional accuracy using precision gauges and automated optical systems. Each bolt is ultrasonically tested for internal voids and magnetic particle inspected for surface cracks. A batch code is laser marked on the bolt head, providing full traceability to the original heat treat lot and manufacturing records. The low cost of a genuine SANY bolt is far outweighed by the cost of fastener‑related failures in critical engine assemblies.

Integration Within the SANY Oil Pan Group

The hexagon flange bolt 61000135 is a critical fastening component within the SANY Oil Pan Group, which ensures the structural integrity and leak‑proof sealing of the engine oil reservoir system. According to the SANY Oil Pan Group catalog, a quantity of 10 units of the 61000135 Bolt, Hexagon Flange, Largen are used per engine assembly. These bolts work in concert with the Oil Pan Assembly (160102130004A016), which serves as the engine’s oil reservoir, and the Oil Pan Sealing Gasket (160102130003A049), which prevents lubricant leaks and maintains proper oil pressure.

The assembly is further reinforced with Retainer, Oil Pan components (60272589) and an additional Retainer of Oil Pan (160102130003A050) that ensure dimensional stability and proper alignment under operational stress. The entire SANY Oil Pan Group mounting system utilizes high‑strength fasteners including the 61000135 Bolt, Hexagon Flange, Large and standard Hexagon Flange Bolt components, engineered to provide exceptional clamping force and vibration resistance. These fasteners work in conjunction with an Oil pan support block (160102130003A051) that provides additional structural reinforcement and distributes operational loads effectively.

The engineering excellence of the SANY Oil Pan Group is evident in its robust construction and precise manufacturing tolerances. Each component undergoes rigorous quality testing to ensure reliable performance under extreme conditions. The comprehensive design of the SANY Oil Pan Group ensures efficient oil containment while maintaining perfect sealing integrity, demonstrating SANY’s commitment to manufacturing excellence and providing durable solutions for heavy‑duty engine applications.

Machine Compatibility & Critical Applications

The hexagon flange bolt 61000135 is used in SANY D09 and D12 series diesel engines powering a wide range of heavy‑duty SANY equipment. These engines are installed in SRT dump trucks (SRT45, SRT55, SRT95, SRT115), wheel loaders (SW405, SW435, SW465, SW305), crawler excavators (SY215, SY335, SY395, SY500), and motor graders (SMG200, SMG220). It is also installed on SANY concrete pump trucks, crawler cranes, and heavy forklifts.

The D09 engine is a straight‑6 diesel with 8.7 liters displacement, 117 mm bore, 135 mm stroke, producing 280‑380 HP and 1,500 N·m of torque. The D12 engine offers 12.13 liters displacement, 131 mm bore, 150 mm stroke, with torque reaching 700 N·m. Both engines utilize SANY’s patented TOP‑Down cooling system and split‑type cylinder head. The oil pan group, secured by the 61000135 bolts, must withstand oil temperatures up to 120°C and continuous vibration from engine operation.

Typical applications for the 61000135 bolt include securing the oil pan retainers, fastening the oil pan support block, and attaching structural components of the crank shaft pulley group mounting system. The bolt’s large‑diameter flange and serrated face ensure that the oil pan gasket remains properly compressed even under the high‑frequency vibrations typical of heavy machinery, preventing oil leaks and maintaining lubricant pressure.

For complete oil pan group reliability, the 61000135 hexagon flange bolt must be used together with genuine SANY oil pan assembly, sealing gasket, retainers, and support block. When servicing the oil pan, always replace any bolt that shows signs of thread damage, corrosion, or deformation. Use only genuine SANY 61000135 bolts to ensure correct thread geometry, flange diameter, and material properties.

Technical Specifications – Hexagon Flange Bolt 61000135

Correct Installation of Hexagon Flange Bolt 61000135

When installing the hexagon flange bolt 61000135, begin by cleaning the bolt threads and the mating threaded hole. Remove debris, old thread locker, or oil residue that could affect torque readings. Apply a small amount of clean engine oil or light assembly lubricant to the threads and the underside of the flange to achieve a stable friction coefficient. Never use grease or sealants unless specified by the SANY workshop manual, as these can alter the torque‑angle relationship.

Always use new 61000135 bolts – never reuse old bolts, especially if they are torque‑to‑yield fasteners. For the SANY Oil Pan Group application, tighten the 10 bolts in a crossing or star pattern, starting from the center and working outward, to ensure even compression of the oil pan gasket. Torque to the value specified in the SANY workshop manual using a calibrated torque wrench. Do not over‑tighten, as this can strip threads, distort the oil pan flange, or extrude the gasket. Under‑tightening will lead to oil leaks and potential engine damage.

After the assembly has been run through one thermal cycle, re‑torquing may be required for certain applications – refer to the SANY workshop manual for specific instructions. If any bolt shows signs of thread damage or corrosion, discard it and use a new genuine 61000135 bolt. The integrated large‑diameter flange eliminates the need for a separate washer, simplifying assembly and reducing the risk of loose hardware.

Store unused bolts in their original packaging in a clean, dry environment. If a bolt is dropped or shows any visible damage, do not use it. The critical nature of the 61000135 bolt means that any compromise can lead to component failure. Always follow the SANY workshop manual for the exact tightening procedure specific to your engine model and application.

Consequences of Improper Bolt Installation

Improper installation of the hexagon flange bolt 61000135 can lead to severe equipment damage. Under‑tightening results in insufficient clamp load, allowing the oil pan gasket to lose compression, leading to oil leaks, loss of oil pressure, and potential engine seizure. Under‑tightening also allows joint movement under vibration, leading to fastener loosening, fretting, and eventual bolt failure.

Over‑tightening can stretch the bolt beyond its yield point, causing thread damage or fracture, or distorting the oil pan flange and cracking the gasket. Symptoms of loose or failed bolts include oil puddles under the engine, low oil pressure warnings, abnormal noise from the affected assembly, and visible movement of components. In severe cases, a loose oil pan can allow the oil pickup tube to become uncovered, causing oil starvation and catastrophic engine failure.

During engine disassembly, always discard old bolts – do not attempt to reuse them. The permanent stretch or thread wear means that original clamp characteristics cannot be restored. Using genuine SANY bolts 61000135 ensures that the material properties, heat treatment, and geometry match the engine’s design requirements. Aftermarket bolts may have different friction coefficients or yield points, leading to incorrect clamp load even when the same torque procedure is followed.

Quality Assurance & Full Traceability

Every hexagon flange bolt 61000135 is manufactured in an IATF 16949 certified facility under SANY’s rigorous quality management system. The production process includes raw material spectrographic analysis, in‑process dimensional verification using precision gauges, and 100% magnetic particle inspection for surface cracks. A sample from each heat treatment batch undergoes tensile testing, wedge load testing, and hardness verification (32–39 HRC core hardness) to confirm that the fastener meets property class 10.9 requirements.

The threads of the 61000135 bolt are inspected for profile accuracy using optical comparators and go/no‑go gauges. The flange geometry and serration pattern are verified for dimensional accuracy. Coating thickness and adhesion are verified using X‑ray fluorescence (XRF) analyzers and cross‑cut tape tests per ASTM D3359. The bolt’s elongation characteristics are tested to confirm consistent performance.

Each 61000135 bolt is laser marked with the SANY logo, property class, and a unique batch code that links to the raw material certificate, heat treat chart, and final inspection records. For bulk orders, a Certificate of Conformance (CoC) is provided, certifying that the bolts meet all SANY OEM specifications for tensile strength, hardness, dimensional accuracy, and surface finish. Independent third‑party audits ensure continuous compliance with ISO 9001:2015 and IATF 16949 standards.

Field Performance of Genuine SANY Hexagon Flange Bolt

Field data from SANY dump trucks and excavators operating in Australian iron ore mines and South African quarries shows that genuine 61000135 hexagon flange bolts installed with the correct torque procedure achieve zero failure rates over the engine’s service life exceeding 25,000 operating hours. Aftermarket or reused bolts have been responsible for numerous oil pan gasket failures and oil leaks due to under‑torquing, over‑torquing, or material fatigue.

The superior reliability of the genuine SANY bolt comes from the premium alloy steel, the precisely controlled heat treatment that provides consistent yield characteristics, and the rolled threads that eliminate stress risers at the thread roots. The large‑diameter flange distributes clamp load evenly across the oil pan gasket, preventing localized high pressure that could extrude the gasket. Fleet owners report a significant reduction in oil leak‑related downtime after standardizing on genuine SANY bolts.

The corrosion‑resistant zinc‑nickel plating also prevents thread seizure, making future disassembly easier and reducing the risk of bolt breakage during maintenance. To maximize service life, always replace bolts whenever a joint is disassembled. The low cost of a new bolt is far outweighed by the cost of engine damage caused by oil loss from a failed joint. For critical applications such as oil pan retainers and engine support blocks, use only genuine SANY bolts 61000135 to ensure the correct clamp load and material properties.