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1159GSE50235-3 – Gulfstream Aerospace OEM Main Landing Gear Spanner Socket
Available now on the Airparts.aero Marketplace.
Overview
The Gulfstream 1159GSE50235-3 is a genuine OEM, safety-critical piece of Ground Support Equipment (GSE), specifically a Main Landing Gear Spanner Socket. This is not a standard socket; it is a heavy-duty, precision-machined tool engineered to interface perfectly with the high-torque, spanner-style axle nuts on Gulfstream large-cabin business jets.
This tool's sole and essential function is to facilitate the safe removal and, more critically, the precise installation and torquing of the main wheel axle nuts. Achieving the correct torque and bearing preload on the landing gear is paramount to flight safety. Using any tool other than this specified socket will damage the expensive axle nut and make it impossible to achieve the correct, certified torque, risking catastrophic wheel failure. This OEM tool is mandatory for performing wheel, tire, and brake service in accordance with the Gulfstream maintenance manual.
Key Features
Genuine Gulfstream OEM Tool: The only tool certified and approved by Gulfstream for this procedure, guaranteeing correct fit, material strength, and safety.
Precision-Machined Lugs: Engineered with exact-tolerance lugs to engage the spanner-style axle nut securely, preventing slippage and damage to the nut or axle.
Enables Correct Torque Application: Designed with a heavy-duty drive (e.g., for a breaker bar or torque multiplier) to allow technicians to apply the extremely high, precise torque values required for wheel bearing preload.
Heavy-Duty Steel Construction: Fabricated from high-strength, heat-treated tool steel to withstand the immense torque and repeated use of a high-volume maintenance environment.
Safety-Critical GSE: The definitive tool for ensuring the structural integrity of the wheel and axle assembly during maintenance.
Technical Specifications
Part Number: 1159GSE50235-3
Component Type: Spanner Socket, Main Landing Gear Axle Nut
OEM Manufacturer: Gulfstream Aerospace
Material: High-Strength Tool Steel
Finish: Durable corrosion-resistant coating
Aircraft Compatibility
This tool, or other dash-numbers in its series (e.g., -5), is the specified OEM socket for the main and/or nose landing gear axle nuts on a wide range of Gulfstream aircraft, including:
Gulfstream G-II, G-III, G-IV, G-V
Gulfstream G350, G450, G550
Gulfstream G600, G650, G700, G800
Note: This compatibility list is for general reference. The specific Gulfstream Aircraft Maintenance Manual (AMM) for the aircraft serial number is the final and absolute authority for determining the correct tool part number.
Applications
Aircraft Wheel & Tire Service: The essential tool for removing and installing main landing gear wheels.
Brake Service: Required for removing the wheel assembly to gain access to the aircraft's carbon brake system.
Landing Gear Maintenance: Used for any servicing or inspection of the axle and wheel bearing assemblies.
Why Choose 1159GSE50235-3?
A Gulfstream's landing gear axle nut is a precision, high-torque component. An improperly torqued wheel assembly can fail on takeoff or landing, leading to a catastrophic loss of control. The 1159GSE50235-3 is the only tool engineered and certified by Gulfstream for this task. Attempting the procedure with an incorrect or improvised tool will, without question, damage the nut and axle, leading to an AOG (Aircraft on Ground) situation and a repair that can cost tens of thousands of dollars. This genuine OEM tool is a non-negotiable investment in safety, ensuring the maintenance is performed correctly and in accordance with the Gulfstream maintenance manual.
The engineering principle that necessitates the 1159GSE50235-3 socket is the design of the spanner-style axle nut. Unlike a standard hex nut, a spanner nut is a round component with a series of square-cut slots machined into its outer diameter. This design allows for a very large nut diameter with a relatively low profile, and it ensures that the torquing force is applied evenly around the nut's circumference. The 1159GSE50235-3 socket is the precise "negative" of this nut, with a set of hardened lugs that slide into these slots. This 360-degree, lug-based engagement is the only way to apply the high, uniform torque required (often 500+ ft-lbs) to properly set the bearing preload without applying a destructive, asymmetric "prying" force.
Note: The 1159GSE50235-3 is a safety-critical piece of Ground Support Equipment. It must only be used by trained and qualified personnel in strict accordance with the Gulfstream Aircraft Maintenance Manual (AMM). The socket and nut must be inspected for damage or wear before each use. A calibrated, high-range torque wrench is required for proper installation.
Documentation
No public-facing OEM specification sheet was located for this proprietary tool. All authoritative technical data, procedures, and applications are contained within the official Gulfstream Maintenance Manuals for the applicable aircraft models.
