Features; Output Shafts; Controls; Control Orificing - Danfoss K Frame Series Service Manual

Service Manual
K and L Frame Variable Motors, Cartridge Mount

Features

Output shafts

Controls

Brake release port

10 | © Danfoss | July 2017
KC/LC motors may have a 13 or 15 tooth shaft, 16/32 pitch, and ANSI B92.1 1970-Class 5. For dimensions,
refer to L and K Frame Variable Motors Technical Information, 520L0627.
KC/LC motors are designed to operate in two positions: maximum and minimum displacement. The
motors are spring biased to maximum displacement and hydraulically shifted to minimum displacement.
KC/LC motors can operate with a single line control only. Pressure applied at port X1 shifts the motor to
minimum displacement. Refer to the table above for control input pressure range.
Control input pressure limits
KC/LC with single line control

Control orificing

KC/LC motors can have optional, internal, supply and drain orifices installed to regulate control response
times.
KC/LC motors rely on external valving and orificing to regulate shift speeds. You can achieve quick
acceleration (shift to min) and slow deceleration (shift to max) simply by installing an orifice in the tank
line of the external control valve.
KC/LC motors are equipped with a brake release port to allow access to the brake-release feature of the
gear box from the rear of the motor. This consists of a simple passage through the motor housing with a
rear-facing 7/16 in. SAE O-ring boss port. Applications using this brake release port require an O-ring to
seal the passage against the gear box.
While all motors will have the brake release port, not all gearboxes are compatible with this motor
feature. Consult your gearbox manufacturer for suitability and compatibility. If your gearbox is not
compatible with this feature, simply leave the port plugged.
14 to 69 bar
[200 to 1000 psi]
520L0631 | AX00000042en-US0402