| Required Tools | |||
|---|---|---|---|
| Part Number | Description | Qty | |
| Laptop Computer | 1 | ||
| JERD2129 | Data Subscription for Electronic Technician (Version 3.0 or a newer version) | 1 | |
| 139-4166 | Data Communication Line for Electronic Technician | 1 | |
| 7X-1701 | Communications Adapter for Electronic Technician or |
1 | |
| 171-4401 | Communication Adapter II for Electronic Technician | 1 | |
| 7X-1425 | Cable for 7X-1701 to PC Communications Port | 1 | |
| 4C-9910 | Portable Hydraulic Tester (Flow Meter) | 1 | |
The specifications for the pressure, the flow rate, and the engine rpm may vary with different work tools and/or suppliers. It is very important to follow the specifications of the supplier. Failure to follow the specifications of the supplier could result in poor performance of the work tool.
- Use a 7X-1701 Communication Adapter or a 171-4401 Communication Adapter II in order to connect a laptop computer to the diagnostic port of the machine.
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| Illustration 1 | g01278798 |
- Place the engine start switch in the ON position. Do not start the engine.
- Start the Electronic Technician (ET).
- Select the "Machine Control 385B" ECM.
- Select "Service" and then select "Tool Configuration" from the pull-down menus that are on top of the screen.
- Select a tool from the list of four tools that are available.
- Change the value of the parameters that are shown in Table 2 through Table 5 in order to meet the specifications of your work tool.
Show/hide table
Table 2 Calibrations for Two-Way Flow Circuit Parameter ("Description") Value "Tool Program Name" "Maximum Throttle Dial" Maximum position of the engine speed dial Show/hide tableTable 3 "Auxiliary Hydraulic Circuit #1" Parameter ("Description") Value "Auxiliary Valve Mode" "Two Way" "Aux Valve Max Extend Flow" Set to specification of work tool "Aux Valve Extend Open Rate" "255" "Aux Valve Extend Close Rate" "255" "Aux Valve Maximum Retract Flow" Set to specification of work tool "Aux Valve Retract Open Rate" "255" "Aux Valve Retract Close Rate" "255" Show/hide tableTable 4 "Proportional Control" Parameter ("Description") Value "Attachment Pedal Valve Mode" (if equipped) "Aux Valve - Normal Modulation" or "Aux Valve - Reverse Modulation" Show/hide tableTable 5 "Joystick Switch Control" Parameter ("Description") Value "Joystick #1 Switch Valve Mode" "No valve controlled" "Joystick #2 Switch Valve Mode" "No valve controlled" "Joystick #3 Switch Valve Mode" "Aux Valve Extend - ON/OFF" "Joystick #4 Switch Valve Mode" "Aux Valve Retract - ON/OFF" "Rocker Switch Valve Mode" "No valve controlled"
- Exit the Electronic Technician (ET).
- Place both ball valves in TWO-WAY position (B) .
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| Illustration 2 | g00711166 |
Location of Ball Valves (A) One-Way position (B) Two-Way position | |
- Press the menu key on the keypad.
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| Illustration 3 | g00572243 |
- Select "SERVICE OPTIONS" from the main menu.
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| Illustration 4 | g00747516 |
- Select "PERFORM CALIBRATION" from the menu options.
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| Illustration 5 | g00747520 |
- Use the right key in order to select "SELECT TOOL PROGRAM" from the calibration menu.
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| Illustration 6 | g00747534 |
- Select the name of the tool for calibration.
- Follow the instructions that are given on the monitor display.
- Install a flow meter to the auxiliary lines that are located on the end of the stick. Refer to Illustration 8 and Illustration 7.
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| Illustration 7 | g00710661 |
Illustration Of Flow Meter Tool Layout (1) 5P-0477 Sleeve (2) 2P-1416 Collet Stem (3) 1P-3705 Rectangular Seal (4) Supply line (5) 5P-0202 Hose (6) 4C-6461 Collet Stem (7) 2S-4078 O-Ring Seal (8) 4C-5094 Coupler Assembly (9) 4C-5093 Nipple Assembly (10) 9U-5229 Union (11) 6K-6307 O-Ring Seal (12) 4C-9910 Portable Hydraulic Tester (Flow Meter) (13) 9U-6807 45 Degree Adapter (16) Return line (29) 5P-8077 Half Flange | |
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| Illustration 8 | g00709194 |
(4) Supply line (12) Flow meter (16) Return line | |
| 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, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
- Connect the "IN" port of flow meter (12) to left auxiliary line (4) .
- Connect the "OUT" port of flow meter (12) to right auxiliary line (16) .
- Start the engine and raise the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).
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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. |
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- Place the machine controls at the following settings:
- Digging mode
- Gain/Response switch in position 2
- Engine speed dial "10"
- AEC switch in position 1
- Digging mode
- Turn the knob on the flow meter counterclockwise until there is no restriction.
- Press and hold down switch (17) on the right joystick while you turn the knob on flow meter (12) clockwise in order to restrict the oil flow. Keep pressing the switch until you reach the specified working pressure of the tool.
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| Illustration 9 | g00711122 |
Right Joystick (17) Close (18) Open | |
- Check the flow to the tool.
- Perform Step 24.a through Step 24.b if the pressure of the work tool is lower than the pressure of the signal relief valves and the line relief valves.
- Loosen locknut (27) on signal relief valve (25) and signal relief valve (26) .
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Illustration 10 g00863353
(19) Adjustment screw
(20) Locknut
(21) Line relief valve
(22) Line relief valve
(23) Locknut
(24) Adjustment screw
(25) Signal relief valve (implement)
(26) Signal relief valve (travel and heavy lift)
Show/hide table
Illustration 11 g00723418
(25) Signal relief valve (implement)
(26) Signal relief valve (travel and heavy lift)
(27) Locknut
(28) Adjustment screw
- Turn adjustment screw (28) of signal relief valve (25) and signal relief valve (26) clockwise until the adjustment screw contacts the bottom. Do not overtighten adjustment screw (28) .
- When the flow meter shows that the flow has gone to zero, the line relief valve has opened. If this pressure is below the specifications for the work tool, loosen locknut (20) and turn adjustment screw (19) clockwise. If this pressure is above the specifications for the work tool, loosen locknut (20) and turn adjustment screw (19) counterclockwise.
- If the flow does not meet the specifications of the tool, return to the Electronic Technician and adjust the "Aux Valve Max Extend Flow" parameter.
- Stop the engine.
- Reverse the lines to flow meter (12) in order to check the retract direction.
- Start the engine.
- Press and hold down switch (18) on the right joystick while you turn the knob on flow meter (12) clockwise in order to restrict the oil flow. Keep pressing the switch until you reach the specified working pressure of the tool.
- Check the flow to the tool and make sure that the flow meets specifications.
- When the flow meter shows that the flow has gone to zero, the relief valve has opened. If this pressure is below the specifications for the work tool, loosen locknut (23) and turn adjustment screw (24) clockwise. If this pressure is above the specifications for the work tool, loosen locknut (23) and turn adjustment screw (24) counterclockwise.
- If the flow does not meet the specifications of the tool, return to the Electronic Technician and adjust the "Aux Valve Maximum Retract Flow" parameter.
- Stop the engine.
- Disconnect the flow meter.
- Reconnect the work tool.
Note: If you change the pressure setting for the signal relief valves, the signal relief valves must be returned to the original pressure settings. Refer to Testing and Adjusting, "Relief Valve (Signal) - Test and Adjust" for the procedure to set the pressure of the signal relief valve.