Products Description
OM753 Brush Cutter Gear Case Screw
Identifying the Correct Fastener for Your Gearbox Assembly
The gear case screw refers to the various fasteners used to secure the gearbox head to the drive shaft tube or to hold the gearbox housing together on the OM753 brush cutter. The OM753, part of the Oleo-Mac (EMAK) 753 series, is a professional 52.5cc brushcutter that typically uses a 32mm diameter drive shaft tube and a gearbox with a 10-tooth spline configuration. While the specific screw sizes and types can vary, they are typically robust steel fasteners designed to withstand high vibration and torque.
Technical Profiles & Materials
High-Strength Construction – The gear case screws are manufactured from durable steel, designed to withstand the high vibration, torque, and stress generated by the OM753's 2.8 HP professional engine during demanding brushcutting operations.
Secure Gearbox Mounting – These screws are critical for securely fastening the gearbox head to the drive shaft tube or for securing the gearbox housing itself. Proper fastening ensures stable power transmission and prevents misalignment that can cause premature wear.
Precision Fitment – The screws are designed to match the specific thread and mounting points of the OM753 and compatible Oleo-Mac/EMAK models, including the EM753, 746T, 750T, 780, and 755 Master series.
Corrosion-Resistant Material – Fasteners used in this application often feature a corrosion-resistant coating or are made from materials that resist rust and degradation from exposure to fuel, oil, and moisture, ensuring long service life in outdoor conditions.
Component of Gearbox Kits – These fasteners are typically included as part of a complete replacement gearbox head or as individual screws when repairing or maintaining the angle drive unit.
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Compatible Models | Oleo-Mac OM753, EM753, 746T, 750T, 753T, 755 Master, 780, EMAK equivalents |
| 2 | Engine Displacement (OM753) | 52.5 cm³ |
| 3 | Engine Power (OM753) | 2.8 HP / 2.1 kW |
| 4 | Tube Diameter | 28mm (common) or 32mm (OEM) |
| 5 | Gearbox Spline Teeth | Typically 10T |
| 6 | Material | Steel / High-strength metal alloy |
| 7 | Unit of Sale | 1 piece or included with gearbox assembly |
Products Application
Gearbox Installation and Replacement
When replacing the entire gearbox head on an OM753 or compatible brushcutter, the mounting screws are used to secure the new gearbox unit to the drive shaft tube. The replacement gearbox head is designed for straightforward installation, typically mounting in minutes without requiring special tools.
Gearbox Repair and Maintenance
During servicing of the angle drive gearbox, such as replacing worn bevel gears or bearings, the gear case screws are removed to access the internal components and then reinstalled to secure the housing. The bevel gear set is a common replacement part for the OM753 gearbox.
Preventative Maintenance
For professional landscapers and grounds maintenance crews, checking and tightening gear case screws is an important part of routine maintenance. Vibration from the 2.8 HP engine can cause fasteners to loosen over time. Replacing lost or damaged screws ensures the gearbox remains securely mounted and prevents damage to the drive system.
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm the correct gear case screw for my OM753?
A:Check your machine model number on the identification plate (OM753, EM753, 746T, etc.). The gearbox typically uses a 28mm diameter shaft with a 10-tooth spline configuration. For the most accurate replacement, refer to the parts diagram for your specific model. Some compatible gearbox heads are listed with part numbers 61112072R or 61112072BR.
Q: What are the symptoms that indicate a gear case screw needs replacing?
A: Common symptoms include the gearbox feeling loose on the drive shaft, unusual vibration during operation, or visible missing or damaged screws. If you notice the gearbox shifting or hear rattling noises, inspect the mounting screws immediately. Loose screws can lead to misalignment and damage to the gearbox internals.
Q: Are the gear case screws available separately or only with the gearbox?
A: While individual screws are sometimes available, they are often included as part of a complete replacement gearbox head or mounting kit. If you need just the screws, it is recommended to check with your supplier if they offer them individually or source the correct size from a hardware store, ensuring it matches the thread and length of the original.
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