Table of Contents
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Service Manual
LDT 21/24/32 Closed Circuit Axial Piston Transmission
General Description
Basic Design
Key Features
Typical Applications
LDT Schematics
©
Danfoss | June 2022
LDT21/24/32 is a U-style hydrostatic transmission with a Z-shaft configuration, including a closed circuit
variable displacement piston pump with DDC (Direct displacement control) and a fixed motor.
LDT21/24/32 is specially designed with optimized performance, size, and cost, in order to fulfill the
demand of the mobile applications marketplace. This document provides the detailed specifications and
features for LDT21/24/32.
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Easy to use design as a complete hydrostatic transmission package for compact utility tractors
ranging from 22 hp to 40 hp
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Compact design
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U-style layout in one housing with Z-shaft configuration
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Requires external charge flow
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LDT21/24 feature 85mm between pump and motor shaft centers, identical to BDU21 and LDU20.
LDT32 shaft center distance is 105mm
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Best in class efficiency, utilizing female piston and male slipper design; overall efficiency of
approximately 80% is possible
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Improved life kit, higher duty cycle capability while providing the most compact design in this class of
hydrostatic transmission
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Low trunnion operating force
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Serviced by Danfoss' global network
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Compact utility tractor
LDT21 hydraulic schematic
AX417167456877en-000101 | 7
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