This document outlines the procedure for replacing the wheel bearing on a Trimax Snake mower, identified as "SPARE PARTS INSTRUCTIONS #79." The process is detailed with step-by-step instructions and accompanying images, emphasizing safety and proper technique.

Function Description:

The primary function of this document is to guide users through the replacement of a wheel bearing on a Trimax Snake mower. This maintenance task is crucial for ensuring the smooth and safe operation of the mower, as worn or damaged wheel bearings can lead to poor performance, increased friction, and potential mechanical failure. The instructions cover the entire process from preparing the mower to final assembly and torque specifications.

Important Technical Specifications:

Date Created: 14/08/2020
Product: Snake (mower)
Title: Wheel Bearing Replacement 416-860-460
Complete Hub Part Number: 416-860-460
Bearing Kit Part Number: 416-860-470
LARGE Tapered Roller Bearing Part Number: 401-842-830
Seal Insert Part Number: 416-860-480
SMALL Tapered Roller Bearing Part Number: 401-842-820
Washer (Axle) Part Number: 416-860-480 (Note: This part number is listed twice, once for the seal and once for the washer, which might indicate a kit or a typo in the original document. For clarity, it's assumed to refer to the washer in the context of fitting it over the axle.)
Washer (Axle thread) Part Number: 308-200-064
Castle Nut Part Number: 416-842-200
Split Pin Part Number: 201-447-000
Bearing Buddy Part Number: 416-000-098
Castle Nut Torque Specification (initial): 68 Nm WHILE ROTATING THE HUB.
Castle Nut Torque Specification (re-torque): 14 Nm WHILE ROTATING THE HUB.
Castle Nut Back-off: 1/6 to 1/4 of a turn until the split pin hole is aligned.
Wheel Nuts Torque Specification: 110 Nm, applied using a specific pattern.

Usage Features:

The instructions are designed for a user performing maintenance on a Trimax Snake mower. Key usage features include:

Clear, Sequential Steps: The process is broken down into logical, easy-to-follow steps, each accompanied by an image.
Safety Warnings: Prominent warning signs (!) are used to highlight critical safety information, such as reviewing the hazard identification table in the Operator Manual, positioning a block under the chassis when raising the mower, and avoiding impact guns for certain torque steps.
Tool Recommendations: The document recommends using a jack or crane to raise the mower, a bearing press or local engineering shop for pressing bearing races, and a bearing greasing tool (though manual greasing is also described).
Specific Part Identification: Part numbers are provided for key components like the complete hub, bearing kit, individual bearings, seals, nuts, and pins, facilitating accurate ordering and replacement.
Visual Guidance: Each step is illustrated with a high-quality image, showing the component being worked on and the action being performed, which is invaluable for visual learners and ensuring correct execution.
Torque Specifications: Precise torque values are given for the castle nut and wheel nuts, which are critical for the longevity and safety of the assembly. The instructions also specify when to rotate the hub during torquing for optimal bearing seating.
Alternative Methods: Where applicable, alternative methods are mentioned, such as hand-greasing bearings if a greasing tool is unavailable, or noting that some mowers may use a grease cap instead of a bearing buddy.
Important Notes: Specific notes (Note:) provide additional context or recommendations, such as having wings down during initial positioning or trimming the split pin's short leg if needed.
Clarity on Hub Replacement: The document clearly distinguishes between replacing the entire hub assembly versus just the bearings and bearing races, guiding the user to skip certain steps if a complete hub replacement is performed.

Maintenance Features:

The document itself is a maintenance feature, providing a structured approach to a common repair.

Preventative Maintenance: By guiding users through proper bearing replacement, the document supports preventative maintenance, extending the life of the mower and preventing more costly repairs.
Detailed Greasing Instructions: The importance of thoroughly greasing bearings is emphasized, with instructions for both tool-assisted and manual greasing to ensure proper lubrication and reduce wear.
Correct Assembly Procedures: The document details the correct order and method for assembling components, including fitting washers, seals, and nuts, and ensuring components are seated squarely.
Troubleshooting/Checks: Instructions like ensuring the hub turns freely without sideways play after torquing the castle nut act as built-in checks to confirm correct assembly.
Part Number Integration: The inclusion of part numbers directly within the instructions streamlines the process of identifying and ordering replacement parts, reducing downtime.
Emphasis on "Genuine Parts": The footer "insist on Trimax Genuine Parts" reinforces the importance of using manufacturer-approved components for optimal performance and safety.
Clear Completion Indicator: The final step explicitly states "This process is now complete," providing a clear end point for the user.

Trimax Snake - Prepare Axle and Mount Hub Assembly

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