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Section 3 - Operation

Hydraulic Operation - Electro-hydraulic

Hydraulic Motor Application

1.Use hydraulic motors designed for closed center or pressure/flow load compensating hydraulic systems only.. Do Not use a hydraulic motor designed for open center hydraulic systems unless it is adapted for use by removing the inlet restrictor..

2.Rating: Hydraulic motors up to 1..26 L/SEC (20..0 GPM) @ 15..50 MPa (2248 PSI) can be used..

3.Be sure the hydraulic motor does not have restrictors in the ports or fittings..

4. Hydraulic motors less than 0..63 L/SEC

(10 GPM) may be equipped with 12..7 mm (1/2") ID hoses and standard (ASAE/SAE/ISO) couplers..

5.Hydraulic motors greater than 0..63 L/SEC (10 GPM) should be connected with (3/4") hoses and (ASAE/SAE/ISO) couplers to prevent excessive restriction and heat generation..

6.It is recommended to use the low pressure return line to reduce back pressure in the remote hydraulic return line which will result in more efficient hydraulic motor operation.. The low pressure return circuit can also be used in applications where low return oil pressure is desired to improve implement operation such as with orbit motor case drain lines, or implement mounted hydraulic control valves..

Operating remote equipment simultaneously or remote equipment and hydraulic lift simultaneously

NOTE: Hydraulic pump output varies with engine speed. Oil flow will be relatively constant in the remote control valve circuits if the flow control is used to provide reduced oil flow, thus providing constant operating speed for hydraulic motors, etc. even if engine speed varies. Maintain the engine speed above the minimum required for simultaneous operation of all required circuits and vary ground speed by selection of the appropriate gear.

If operating two or more remote control valves simultaneously or remote valves and hydraulic lift, all the flow control knobs should be adjusted to provide a partial flow.. Otherwise, all the available flow may be directed to the full flow circuit when the pressure in that circuit is less than that of the other circuits in use..

Bleeding Remote Cylinders

When connecting a cylinder with trapped air, i..e.. a new cylinder, one that has been out of service or one that has had the hoses disconnected, it will be necessary to bleed the cylinder to remove the air..

With the hoses connected to the remote control valve couplers at the rear of the tractor, position the cylinder with the hose end uppermost and extend and retract the cylinder seven or eight times using the remote control switch.. Check the hydraulic oil tank level before and after operating the remote cylinder..

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