3-89 Section 3 - Operation

Hydraulic Operation - Electro-hydraulic

Connecting Single-acting Cylinders

Connect the hose from a single-acting cylinder to the left extend/raise coupler on the remote control valve, as previously described..

To extend a single-acting cylinder, pull the lever back to the “extend” position..

Manually return the lever to the neutral position to stop the cylinder before it is fully extended or allow the valve to return to neutral automatically when the cylinder reaches the end of its stroke and timed operation..

To retract a single-acting cylinder, move the lever forward to the “retract” position..

IMPORTANT: Always use the “float” position to lower a single-acting cylinder. The “retract” position is for double-acting cylinders only.

Connecting Double-acting Cylinders

Connect the feed hose from a double-acting cylinder to the left extend/raise coupler on the remote control valve and the return hose to the right retract/lower coupler, as previously described.. To extend a double- acting cylinder, pull the lever back to the “extend” position..

To retract a double-acting cylinder, push the lever forward past neutral to the “retract” position..

Further forward movement of the lever will select “float” which will allow the cylinder to extend or retract freely.. This feature is very helpful when carrying out work with equipment such as scraper blades and loaders..

Operating Continuous Flow Hydraulic Equipment

Continuous flow hydraulic equipment (e..g.. hydraulic motors) should be connected to the 3RD remote control valve couplers with the pressure hose connected to the right retract coupler and the return hose connected to the low pressure return circuit as described previously in this section..

Use the flow control to regulate the motor speed.. The #1 flow control should be adjusted to regulate the orbit motor speed.. If the flow control is open too far, the 3-point hitch and other remote valves will slow down or stop.. This will ensure that the hydraulic system will only supply the oil required by the motor.. Extra pump capacity will not be used except when other remote valve sections are operated..

With the remote lever fully forward in the “float” position, the motor will be stationary.. The hydraulic motor will operate if the lever is pushed forward to the “retract” position.. To stop the motor, move the lever from the retract position to the float position.. In the float position the motor will be able to stop slowly, which will not damage the motor..

IMPORTANT: When operating continuous flow equipment, the remote control valve lever must not be moved rearward to the neutral or raise positions as damage to the equipment may result.

Observe the following to further protect the tractor and equipment..

•Do not open any bypass valve in the equipment or motor.. Use the flow control to regulate the rate of flow or speed of the motor..

•Do not hold the remote control valve lever to operate the equipment..

•To ensure optimum hydraulic oil cooling, operate continuous flow equipment at the highest flow setting (by use of the flow control) and lowest engine speed that will give the required machine performance and speed..

•Do not use the #1 valve circuit to operate continuous flow equipment that requires more than 137..90 bar (2,000 PSI).. The #1 flow control may shut the rest of the system down if the continuous pressure is too high.. Connect these loads to any other valve section..

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