Hydro-Gear BDU-21L-200 Hydrostatic Transmission

A complete hydrostatic transmission for restoring controlled, dependable machine travel. The BDU-21L-200 belongs to the BDU-21L family and is intended for the application identified by its complete build code.

This is not a universal replacement. Hydrostatic transmissions in the same family can differ in input shaft, controls, ports, rotation, mounting, and internal configuration even when their housings look alike.

Why This Matters

The transmission must match both the mechanical installation and the hydraulic behavior expected by the equipment. Confirming the full tag number before ordering can prevent an expensive mismatch and protect connected drivetrain components.

Product Details

Installation & Service Notes

• Determine why the original transmission failed and correct belt, cooling, linkage, or contamination issues before installing the replacement.
• Use the equipment manufacturer’s specified oil, filtration, adjustment, and purge procedures.
• No equipment-specific installation PDF has been verified for this listing.

Before You Order

Match the complete part/build code and verify the original component, equipment model and serial number, plus all relevant shaft, axle, control, port, brake, rotation, mounting, and revision details. A partial code or similar appearance is not enough to confirm fitment.

Lead Time, Returns & Warranty

• Many HydroDrives-supplied products are built to order and may require approximately 10–15 business days before shipment.
• Orders may ship from a U.S. partner warehouse, subject to confirmation.
• Approved returns may be subject to a 20% restocking fee; shipping is nonrefundable.
• Build-to-order, installed, used, damaged, or fluid-filled products may be nonreturnable.
• Warranty coverage may require authorized-service-center installation. Retain service records.