Danfoss LDU21C Service Manual page 8

Service Manual
LDU21C Closed Circuit Axial Piston Transmission
General Description
Basic Design
Key Features
Typical Applications
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8 | Danfoss | April 2025
LDU21C is a kind of U-style HST hardware, including a closed circuit variable displacement piston pump
with DDC (Direct displacement control) and a fixed motor. LDU21C 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 LDU21C.
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Easy to use design as Complete Hydrostatic Transmission package for rice planter up to 16kw
[21.5HP]
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Compact design
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U-style layout in One housing with Z-shaft configuration
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Require external charge
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Same shaft center distance (85mm) as BDU21 and LDU20. Same flange dimension as BDU21.
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Best in class Efficiency by advanced kit design...Can reach approximately 80% overall efficiency
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Longer life kit, Higher Duty Cycle capability with best-in-class compact design
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Low trunnion operating force
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Serviced by a Worldwide Network of Danfoss
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Rice Planter
AX342138485422en-000102