Hydraulic connections for OMS, OMT and OMV motors
Main inlet hoses connections (Y)
The motor has two port connections on the end cover which can be both inlet or outlet ports depending
on the application.
Drain line connection (Z)
The drain line relieves the pressure on the shaft seal to tank. The tank pressure must be less than or equal
to the maximum permissible seal pressure – see seal graph shown in the Technical Information catalogue
for OMS, OMT and OMV motors.
The following main rules apply to drain lines fitted to Danfoss hydraulic motors:
•
We recommend a drain line when the maximum pressure on the shaft seal is exceeded, i.e. the life of
the shaft seal can otherwise be significantly reduced.
•
We always recommend a drain line when
‒
A short motor (bearing less motor) is built together with e.g. a gear.
‒
The motor is used in hydrostatic transmissions that do not have a separate flushing valve.
Tightening torque
The recommended tightening torque for the hoses are shown in the table below.
Maximum tightening torque
Screwed connection G 1/4 G 1/2 G 3/4 G 1
- with steel washer 40 N•m [350 lbf•in] 130 N•m [1,150 lbf•in] 210 N•m [1,850 lbf•in] 280 N•m [2,500 lbf•in]
- with cutting edge 40 N•m [350 lbf•in] 130 N•m [1,150 lbf•in] 210 N•m [1,850 lbf•in] 280 N•m [2,500 lbf•in]
User Manual
ATEX instruction for OMS, OMT and OMV
Installation, operation and maintenance
©
Danfoss | September 2016 11160602 | AQ00000213en-US0103 | 13
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