M314F and M316F Wheeled Excavators Hydraulic System Flow (Control Valve Combined Function) - Test and Adjust Caterpillar

Specification

Introduction

Utilize the procedure for a control valve (combined function), if the machine is equipped with a multifunction valve.

If behavior problems exist when starting the work tool, then perform the auto calibration procedure "Multi-Function-Auxiliary Calibration" in Cat^® Electronic Technician (Cat ET), before performing the following procedure.

Required Tools

Illustration 1	g02422457
Tooling (D) (Flow meter tool layout)

Machine Preparation

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Illustration 2	g02449876
Engine speed dial

1. Set the engine speed dial at "10".

2. Lower the left console.

3. Position the machine on level ground. Check the visibility and adjust the mirrors for the best vision close to the machine.

4. Fully depress the service brake pedal until the service brake pedal locks mechanically.

5. Increase the hydraulic oil temperature to 46° to 60° C (115° to 140° F).

6. Lower the stabilizers and the blade tip.

7. Fully extend the bucket cylinder and place the bucket on the ground.

8. Stop the engine.

9. Release pressure in the hydraulic system. Refer to Testing and Adjusting, "System Pressure - Release".

10. Raise the left console.

11. Attach tooling (F) onto the hydraulic tank. Attach an air supply hose onto the assembly. Apply 276 to 414 kPa (40 to 60 psi). This procedure will pull a vacuum on the hydraulic system.
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    Illustration 3	g03741225
    Diverter valves or high-pressure oil delivery to the work tool (typical example)

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    Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

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    NOTICE
    Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates.

12. Install tooling (D) in accordance with the flow meter tool layout to the diverter valves. Refer to Illustration 1 and Illustration 3.

    Note: If the work that is being tested has a cylinder, make sure that head end (A-side) of the cylinder is connected to the diverter valve (A-side) on the left side of the stick.

13. Open diverter valves that are mounted on each side of the stick.

14. Remove tooling (F) from the hydraulic tank.

15. Verify that the correct type of work tool has been selected during the tool programming.

    Note: Work tools that rotate perform differently than work tools with cylinders.

Test and Adjust Procedure

1. Start the engine.

2. Set the engine speed dial at "10".

3. Lower the left console.
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   Illustration 4	g02446738
   Power mode control button located on the soft panel switch

4. Push down on the power mode control button in order to activate power mode.

   Note: The indicator light will be illuminated when power mode is activated.

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   Illustration 5	g02447036
   Automatic Engine Speed Control (AESC) as displayed on the programmable function key in the monitor.

5. Disable the automatic engine speed control through the monitor by pressing the programmable button.
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   Illustration 6	g03722432
   Hydraulic modulation switch on left joystick

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   Illustration 7	g06186138
   Hydraulic modulation aggressive mode (monitor display)

6. Select the hydraulic modulation mode as aggressive. Press the lower front switch on the left joystick to select the hydraulic modulation mode.

7. The air conditioning should be turned off for the following test.
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   To prevent personal injury or equipment damage from failure of the hydraulic test equipment or associated circuit components because of blocked pump flow, make sure that the test equipment valves are fully open before starting the engine.

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   To prevent personal injury and/or equipment damage from failed lines or components while the hydraulic test equipment is returned to the open flow position, slowly open the hydraulic test equipment valve while monitoring the pump flow. If pump flow does not increase as the valve is opened, shut the engine off and determine what is preventing the pump from upstroking.

8. For flow "A⇒B", move thumb slider on the left joystick or the hammer pedal to the maximum left position. For flow "B⇒A", move thumb slider on the left joystick or the hammer pedal to the maximum right position.

9. If the flow is not within specification, proceed to the "Adjust Procedure".

Adjust Procedure

1. If the flow is too high or too low, change the value in the "Tool Configuration" menu.

   Note: Inorder to check the maximum flow, set the maximum value and compare the flow on the hydraulic tester to the specification that is listed in Table 1.

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   Illustration 8	g03722433

   1. Press the "Menu" key to display the main menu options.
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      Illustration 9	g03724611

   2. Use the arrows to select "Service Mode" from the "Main Menu". Press the "OK" key.

   3. Input the password "FFF2". Press the "Enter" key.

      Note: The soft switch key pad can be used to enter the desired numbers.

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      Illustration 10	g03741236

   4. Select "Tool Program" from the "Service" menu. Press the "OK" key.
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      Illustration 11	g03741237

   5. Use the arrows to select the desired tool for programming. Press the "OK" key.
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      Illustration 12	g03743962

   6. Use the arrow keys to highlight the parameter. Press the "OK" key to change the default value.

   7. Use the arrow keys to change the value on the monitor until the desired flow is attained on the flow meter. Press the "OK" key to enter the change.

      Note: The soft switch key pad can be used to enter a desired number value.

      Note: If the selected solenoid is "Two Way", the parameters for the "Back" direction ("B⇒A") and the "Front" direction ("A⇒B") will be displayed.