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SECOND PROCEDURE

ASSEMBLY OF A GREAT BEND BACKHOE TO A NON GREAT BEND LOADER VALVE - OR - GREAT BEND BACKHOE TO LOADER VALVE USING PTO PUMP KIT OPTION

Assembly of a Great Bend backhoe to a non-Great Bend loader valve, OR a Great Bend Backhoe to a loader valve using the PTO Pump Kit option.

IMPORTANT:

Improper hydraulic hook-up can cause seri- ous damage to the backhoe control valve, loader valve, tractor valve, and other hydraulic components.

The pressure supply line from the PTO pump must be connected to the pressure inlet port on the backhoe bulkhead connection whether using a Great Bend loader valve or a non- Great Bend loader valve. Never connect the pressure supply line from the PTO pump to the loader valve pressure inlet port because excessive pressure will build up resulting in damage to the PTO pump.

The following instructions are to be used to connect the backhoe valve in line with a loader valve that is not a Great Bend loader valve. When connecting the Great Bend backhoe valve to a loader valve other than one obtained from Great Bend, the input pres- sure line from the tractor will be connected to the pressure port on the backhoe bulkhead connection first. In order to properly plumb the system, the back- hoe valve will require converting to a power beyond valve. The power beyond pressure line from the backhoe valve will be connected to the input pres-

sure port of the loader valve. The power beyond kit for the backhoe being assembled must be ordered as a separate item from Great Bend.

Assembly

1.Remove the front cover that encloses the back- hoe valve within the control console.

2.Carefully clean the top and front sides of the backhoe valve and remove the large “Port C” plug located on the front of the right hand end section of the valve.

3.Install power beyond / closed center plug inside of port. Make sure power beyond / closed center plug is tightly engaged.

4.Install 90° male adapter into “C” port with open end of adapter (JIC side) oriented so that it points down and towards the right side of the backhoe.

5.Connect hydraulic hose (supplied by customer) to 90° male adapter. The hydraulic hose should have the same pressure rating as the original pressure hose to the loader or other accessory valve.

6.Connect the other end of the hydraulic hose to the pressure port of the loader or accessory valve using fittings (supplied by customer) as required. Refer to Figure 24.

7.Complete assembly of the backhoe “pressure” and “return” hydraulic hoses and a tee fitting (all sup- plied by customer) as shown.

8.Complete assembly of the loader or accessory valve “return” hydraulic hose (supplied by cus- tomer) to the tee fitting as shown.

Figure 24

To Tractor Reservoir

Loader Or

Inlet

 

 

Port or Backhoe

Accessory Valve

 

Return Filter Inlet

Remove port “C” plug and install closed center plug inside port.

Backhoe Valve

Return From

Backhoe Valve

Pressure

Pressure To

Backhoe Valve

Outlet

Return From

Loader Valve

Pressure To

Loader Valve

Backhoe Bulkhead

ConnectorFrom Tractor Pressure “Out” Port Or Outlet Port

Of PTO Pump

37

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Bush Hog 2165 manual Second Procedure, Assembly

2165 specifications

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