Birchmeier Pump Shaft with Bearing 108-163-02

Birchmeier 108-163-02 Pump Shaft with Bearing – Old Style Backpacks

The Birchmeier 108-163-02 Pump Shaft with Bearing is a replacement pump shaft assembly for older-style Birchmeier backpack sprayers. The shaft is supplied assembled with one bearing and is intended for repairing a worn or damaged pump shaft assembly.

IMPORTANT COMPATIBILITY WARNING: This part fits old-style Birchmeier backpacks only. It DOES NOT fit AT-style Birchmeier backpack sprayers. Verify your sprayer model and pump design before ordering.

IMPORTANT INSTALLATION NOTE: This replacement shaft includes one bearing. You must reuse one bearing from your original pump shaft to complete the installation. Do not discard your old shaft assembly until you have removed the bearing needed for reuse.

Features & Benefits

• Replacement Pump Shaft: Designed for compatible older-style Birchmeier backpack sprayers.
• Preassembled Component: The replacement shaft arrives assembled with one bearing.
• Pump Repair Part: Allows replacement of a damaged or worn shaft without replacing the entire backpack sprayer.
• Installation Documentation: Shaft replacement instructions and a backpack parts breakdown are available below.

When Should You Replace the Pump Shaft?

The pump shaft is a mechanical component that can experience wear during normal sprayer operation. Replacement may be necessary when inspection reveals:

• Visible bending, scoring, or other damage to the shaft
• Excessive wear at bearing contact surfaces
• Unusual looseness or movement in the shaft assembly
• Damage discovered while servicing the pump mechanism

Repair Tip: Inspect the bearing you plan to reuse before installation. If it is rough, seized, loose, or visibly damaged, investigate the correct replacement bearing rather than reinstalling a worn component.

Product Specifications

Installation & Bearing Reuse

Before beginning the repair, confirm that your backpack uses the older-style Birchmeier pump shaft assembly. Follow the shaft replacement instructions linked below for the correct disassembly and installation procedure.

Keep the original pump shaft and bearing components available during the repair. Because the replacement assembly includes only one bearing, you will need to transfer one bearing from the old assembly to complete installation.

Before servicing the sprayer, relieve all pressure, empty the tank as appropriate, and follow the manufacturer's maintenance instructions. After reassembly, check for smooth mechanical operation and test the sprayer for proper function.

Birchmeier Pump Shaft Replacement Instructions

Download the illustrated instructions for replacing the pump shaft on a compatible Birchmeier backpack sprayer.

Download Birchmeier Pump Shaft Replacement Instructions (PDF)

Birchmeier Backpack Parts Breakdown

Use the parts diagram to identify the pump shaft assembly and surrounding components before ordering or beginning repairs.

Download Birchmeier Backpack Parts Breakdown (PDF)