Basic Design
LDU20 is a U-style HST transmission, including a closed circuit variable displacement piston pump with
DDC (Direct displacement control) and a fixed motor. LDU20 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 LDU20.
LDU20 Cross-sectional view
Charge pressure relief valve
High pressure relief valve
Bypass
valve
Ball bearing
Ball bearing
Needle bearing
Output shaft
Working
Center section
PTO shaft
Input shaft
Swash plate
Working
P400002
Key Features
•
Easy to use design as Complete Hydrostatic Transmission package for Turf care machine & Compact
Utility Tractor of up to 22kw[30PS]
•
Compact design
•
U-style layout in One housing with Z-shaft configuration
•
Available external charge
•
Bypass valve for the pulling of the vehicle
•
Same shaft center distance as BDU21 85mm…Between pump and motor shaft
•
Same drive line design is available between BDU21 and LDU20
•
Best in class Efficiency by Female Piston & Male slipper design…Can reach approximately 80% overall
efficiency
•
Longer life kit, Higher Duty capability in most compact design in this class of HST
•
Low operating force
•
Serviced by a Worldwide Network of Danfoss
Typical Applications
•
Compact utility tractor
•
Turf care
•
Small agricultural machinery
Service Manual
LDU 20 Closed Circuit Axial Piston Transmission
General Description
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©
Danfoss | July 2017
11071687 | AX00000049en-US0202
