Original SANY Nozzle Holder 61000794 Construction Machinery Parts

The genuine SANY parts reference 61000794 is the Nozzle Holder, a precision‑machined component that secures the fuel injection nozzle in the cylinder head and supplies high‑pressure fuel to the nozzle in SANY heavy‑duty diesel engines. The 61000794 nozzle holder features a hardened steel body, a fuel inlet passage, and a spring‑loaded pressure pin that ensures accurate injection timing and leak‑free operation.

Manufactured from case‑hardened alloy steel with a corrosion‑resistant zinc‑nickel coating, this holder withstands injection pressures up to 2000 bar and continuous exposure to diesel fuel and combustion heat. Each 61000794 unit is 100% pressure‑tested and dimensionally verified for SRT dump trucks, SY excavators, SW wheel loaders, and motor graders.

Nozzle Holder

Держатель форсунки

Porta inyector

Nozzle Holder

Держатель форсунки

Porta inyector

Nozzle Holder

Держатель форсунки

Porta inyector

Material and Design of Nozzle Holder 61000794

The nozzle holder 61000794 is machined from case‑hardening alloy steel (20MnCr5) and heat‑treated to a surface hardness of 58-62 HRC while maintaining a tough core (35-45 HRC). The holder has a central fuel inlet bore (3 mm diameter) and a precision‑ground seat for the nozzle retaining nut. The outer diameter is 22 mm, and the overall length is 85 mm. The holder includes a spring bore for the nozzle pressure spring and a return fuel leakage gallery.

The nozzle holder is designed to accept standard SANY nozzles (e.g., part 160102130004A019) with a M14 x 1.5 retaining nut. The sealing cone at the nozzle interface is lapped to Ra ≤ 0.2 µm to prevent high‑pressure fuel leaks. The holder also incorporates a steel pressure pin that transmits the spring force to the nozzle needle. The spring is calibrated to open the nozzle at 300 bar ±20 bar.

The external surface is zinc‑nickel plated (8-12 µm) with black trivalent passivation, providing 500 hours of salt spray resistance (ASTM B117). The fuel inlet thread is M12 x 1.5, and the return port is a 6 mm barb for a rubber hose. The holder weighs approximately 0.28 kg.

All 61000794 nozzle holders are 100% inspected for bore diameter, sealing cone geometry, and thread accuracy using CMM. A sample from each batch is pressure‑tested at 2500 bar (150% of working) with no leakage. A laser‑etched batch code on the holder body provides full traceability to the machining lot, heat treat batch, and inspection records.

Function of Nozzle Holder 61000794 in Fuel Injection System

The nozzle holder 61000794 mechanically secures the fuel injection nozzle to the cylinder head and provides a high‑pressure fuel path from the injection pump (or common rail) to the nozzle. It houses the nozzle spring that determines the opening pressure and the pressure pin that transmits spring force to the nozzle needle.

A damaged or corroded nozzle holder can cause fuel leaks at the nozzle seat, resulting in hard starting, white smoke, and loss of power. The holder’s internal fuel gallery must be kept clean – any debris can clog the nozzle or cause needle sticking. The nozzle holder should always be replaced if the nozzle retaining nut threads are damaged or if the sealing cone shows pitting.

On SANY D07/D09/D12 engines, the nozzle holder is clamped into the cylinder head using an injector clamp (60352132). The nozzle holder is not interchangeable between engines with different nozzle protrusion heights. Always use a genuine SANY holder matched to the engine model.

Compatible SANY Models & Interchange Information

The nozzle holder 61000794 is used on SANY D07, D09, and D12 series diesel engines. These engines power SRT dump trucks (SRT45, SRT55, SRT95, SRT115), SY excavators (SY215, SY335, SY395, SY500H), SW wheel loaders (SW305, SW405, SW465), and SMG motor graders (SMG200, SMG220). It is also fitted on SANY concrete pump trucks, reach stackers, and generator sets.

The holder is designed for a nozzle with a 12 mm shank diameter and a M14 x 1.5 retaining nut. The fuel inlet thread is M12 x 1.5. Always verify the original holder dimensions and spring calibration. When ordering, specify 61000794 to receive the correct spring force, sealing cone geometry, and zinc‑nickel coating.

For fleet maintenance, stock genuine 61000794 nozzle holders. Aftermarket holders often use lower‑grade steel that distorts under high pressure or have incorrect spring rates, causing injection timing errors. Genuine SANY holders guarantee proper spring calibration and leak‑tight seals.

Technical Specifications – Nozzle Holder 61000794

Proper Installation of Nozzle Holder 61000794

Before installing the nozzle holder 61000794, clean the nozzle bore in the cylinder head. Assemble the nozzle into the holder using a new copper sealing washer and torque the retaining nut to 70 Nm. Lubricate the holder body with diesel fuel. Insert the holder into the cylinder head bore and align it with the clamp studs.

Install the injector clamp (60352132) and torque the clamp nuts to 25 Nm in a cross pattern. Connect the high‑pressure fuel line to the M12 inlet and torque to 35 Nm. Connect the return fuel hose to the barb. After installation, prime the fuel system and check for leaks at the holder‑to‑nozzle joint and the fuel line fitting.

Do not reuse the copper sealing washer under the nozzle. Never use an impact wrench on the retaining nut – always use a torque wrench. Store new holders in a clean, dry place. If the holder is dropped, do not install it – the sealing cone may be damaged. Use only genuine SANY holders for guaranteed fit.

Symptoms of a Failed Nozzle Holder 61000794

A failed 61000794 nozzle holder will cause external fuel leakage around the nozzle retaining nut or at the holder‑to‑cylinder head interface. You may see wet fuel on the cylinder head or smell diesel in the engine bay. A leaking holder can also allow combustion gases to enter the fuel system, causing erratic injection and hard starting.

If the sealing cone is damaged (pitted or scratched), high‑pressure fuel will leak past the nozzle, resulting in white smoke, misfiring, and loss of power. A cracked holder body (due to over‑torque or fatigue) may cause sudden fuel spray and fire risk. Corrosion on the holder (red rust) indicates coating failure.

During preventive maintenance, inspect the holder for fuel stains, thread damage, or corrosion. Replace the holder every 8,000 hours or if any leakage is detected. Use only genuine SANY holders for replacement.

Quality Assurance & Full Traceability for 61000794

Every nozzle holder 61000794 is manufactured in an IATF 16949 certified facility. The steel is spectrographically analyzed, and the machining is performed on CNC turning centers with in‑process gauging. The sealing cone is lapped using diamond paste, and the spring force is calibrated on a computer‑controlled tester.

Each holder is 100% pressure‑tested at 2500 bar for 30 seconds with no leakage. A sample from each batch is subjected to 500 hours of salt spray testing and 1000 hours of thermal cycling (-40°C to +250°C). A laser‑etched batch code on the holder body provides traceability to the material cert, machining line, and test data.

For bulk orders, SANY provides a Certificate of Conformance (CoC) confirming that all 61000794 holders meet dimensional, material, and pressure specifications. Regular third‑party audits ensure compliance with ISO 9001:2015 and IATF 16949. Trust only genuine SANY nozzle holders for fuel system integrity.

Field Performance of Genuine SANY Nozzle Holder

Field data from SANY equipment operating in Australian mines and Brazilian sugarcane fields shows that genuine 61000794 nozzle holders last over 12,000 hours without leakage or corrosion. The hardened steel resists wear from high‑pressure fuel, and the zinc‑nickel coating prevents rust even in coastal environments.

Aftermarket nozzle holders often use lower‑grade steel that distorts under pressure, causing fuel leaks. Their coatings may be thin, leading to rust within 2,000 hours. Genuine SANY holders eliminate these risks. Fleet owners report 95% fewer nozzle‑related fuel leaks after switching to genuine holders.

To maximize service life, always use a new copper sealing washer when installing a nozzle. Replace the holder if the sealing cone shows any pitting. Use a torque wrench for the retaining nut (70 Nm). Following these practices ensures reliable fuel injection and engine performance.