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Hydraulic oil pressure can remain in the hydraulic system on this machine after the engine and pump have been stopped. Serious injury can result if this pressure is not released before any service is done on the hydraulic systems. In order to prevent possible injury, release the hydraulic system pressure before working on any fitting, hose, or hydraulic component. Lower all attachments to the ground before service is started. If the hydraulic system must be serviced, tested, or adjusted with the attachment in the raised position, the attachments and lift cylinders must be supported properly. Always move the machine to a location away from the travel of other machines. Be sure that other personnel are not near the machine when the engine is running and tests or adjustments are being made. |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Dispose of all fluids according to local regulations and mandates. |
| D9T Test for Hydraulic Fan Speed (On Demand) | ||
|---|---|---|
| Date | Equipment ID Code | |
| Item | Specification | Actual |
| Engine Speed | High Idle | |
| Maximum Mechanical High Pressure at Pressure Tap (HFPD) | |
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| Minimum Pump Pressure at Pressure Tap (HFPD) | |
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| Atmospheric Pressure | From ET | |
| Ambient Air Temperature | Measured | |
| Correction Factor | Calculated | |
| Clip Speed | Calculated by ET | |
| Pressure Setting For Relief Valves (Fan Reversing Valves) | |
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| Fan Reversing Valve Torque | |
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This procedure includes the following calibrations:
- "Fan Speed Calibration"
This procedure includes the following tests:
- "Test Preparation"
- "Test Procedure - Minimum Pump Pressure"
This procedure includes the following adjustment procedures:
- "Adjustment Procedure - Maximum Mechanical High Pressure"
- "Adjustment Procedure - Minimum Pump Pressure"
Fan Current at 0.020 Amps - Minimum fan pump control current allowed by the fan control software. The maximum mechanical high-pressure adjustment is set at this current.
Fan Speed at 0.020 Amps - The highest fan speed the system is capable of producing.
Fan Current at 1.6 Amps - Maximum fan pump control current allowed by the fan control software.
Fan Speed at 1.60 Amps - The lowest fan speed the system is capable of producing.
Fan Current at 1.55 Amps - The minimum pump pressure adjustment is set at this current.
Calibrated Minimum Current - The current being sent to the fan pump solenoid by the fan controller at 100% fan bypass.
Calibrated Minimum Speed - The fan speed at 100% fan bypass.
Calibrated Clip Current - The current being sent to the fan pump by the fan controller at 0% fan bypass.
Calibrated Clip Speed - The fan speed at 0% fan bypass.
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| Illustration 1 | g02571852 |
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Tooling (A) 198-4240 Digital Pressure Indicator Gp | |
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| Illustration 2 | g02478137 |
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Tooling (D) | |
| Required Tools | ||||
|---|---|---|---|---|
| Tool | Item | Qty | Part No | Description |
| A | 198-4240 | Digital Pressure Indicator Gp | ||
| A1 | 1 | 198-4234 | Digital Indicator | |
| A2 | 1 | 198-4239 | Pressure Sensor Gp
(0 kPa to 41,368 kPa (0 psi to 6,000 psi)) |
|
| A3 | 1 | 198-4236 | Adapter Cable As | |
| D | D1 | 348-5430(1)(2) | Multi-Tool Gp | |
| D2 | 1 | 6V-2198 | Cable As | |
| D3 | 1 | 9U-5140 | Photo Pickup | |
| D4 | 1 | 6V-3137 | Base | |
| D5 | 1 | 1U-6605 | Reflective Tape | |
| D6 | 1 | 6V-3138 | Extension | |
| 1 | 257-5616 | Test Manifold Block | ||
| (1) | Refer to Tool Operating Manual, NEHS1087 for operating instructions. |
| (2) | Software License Card, NETG5049 Multitach II is required when performing the current procedure. |
Reference: Refer to Tool Operating Manual, NEHS1087 for operating instructions for the 348-5430 Multi-Tool Gp.
Note: Use Software License Card, NETG5049 with part number 348-5430 Multi-Tool Gp.
- Move the machine to a smooth horizontal location.
- Engage the parking brake.
- Lower the implements.
- Stop the engine.
- Turn the key to the ON position. Make sure that the implement lockout switch is turned to the UNLOCKED position. Move the implement control levers to all positions several times to release any pressure in the hydraulic system.
- Remove the floor plate that is located in front of the operators seat in the cab.
Show/hide table
Illustration 3 g03392409 (HFPD) Pressure tap
(1) Fan pump - Attach tooling (A) to pressure tap (HFPD) on fan pump (1).
- Connect the Electronic Technician (ET) to the diagnostic port on the tractor.
Test Procedure - Maximum Mechanical High Pressure
- Start the engine. Warm the hydraulic oil to a temperature of
71° ± 5°C (160° ± 9°F) . Make sure that all systems on the machine are warmed up to operating temperature. - Set the implement lockout switch to the LOCKED position.
- Make sure that the steering control lever is in the NEUTRAL position.
- Select the Engine ECM in Electronic Technician.
- Select the Service tab.
Show/hide table
Illustration 4 g02354856 - Select "Calibrations".
Show/hide table
Illustration 5 g03428242 - Select "Engine Cooling Fan Calibration".
- Follow the onscreen instructions for the "Set up calibration conditions" only.
Note: Do not complete the calibration procedure at this time.
Show/hide table
Illustration 6 g02354898 - Use the increment and decrement buttons at the bottom of the screen to adjust the fan current.
Show/hide table
Illustration 7 g03428260 - Use the buttons to move the slide bar until the current is set to 0.020 Amps or all the way to the left.
- Check the pressure at tooling (A). The pressure for maximum mechanical high pressure should be
16300 ± 800 kPa (2364 ± 116 psi) . - If the pressure is not within the specified limit, perform the steps in "Adjustment Procedure - Maximum Mechanical High Pressure".
Note: The maximum mechanical pump pressure adjustment and the minimum pump pressure adjustments influence each other. Whenever you adjust one pressure, always check the other pressure and then make any necessary adjustment.
- If the pressure is within the specified limit, perform the steps in "Test Procedure - Minimum Pump Pressure".
Adjustment Procedure - Maximum Mechanical High Pressure
- Perform the steps in the "Test Preparation" and then continue to the following steps.
Show/hide table
Illustration 8 g02507196 (2) Solenoid
(3) Locknut
(4) Adjustment screw for maximum mechanical fan pump pressure - Hold adjustment screw (4) in place and loosen locknut (3).
- Turn adjustment screw (4) clockwise to increase the pressure setting or turn adjustment screw (4) counterclockwise to decrease the pressure setting.
- Hold adjustment screw (4) in place and tighten locknut (3).
- Perform the "Test Procedure - Maximum Mechanical High Pressure" again.
- When the pressure is within the specified limit, perform the Steps in "Test Procedure - Maximum Mechanical High Pressure".
Note: The maximum mechanical pump pressure adjustment and the minimum pump pressure adjustments influence each other. Whenever you adjust one pressure, always check the other pressure and then make any necessary adjustment.
Test Preparation - Minimum Pump Pressure
- Perform the steps in the "Test Preparation" and then continue to the following steps.
Test Procedure - Minimum Pump Pressure
Note: When the fan pump is producing minimum pump pressure, the fan motor will rotate at the minimum rpm.
- Perform the steps in the "Test Preparation" and then continue to the following steps.
Show/hide table
Illustration 9 g02507141 (HFPD) Pressure tap
(1) Fan pump
(2) Solenoid - Start the engine. Warm the hydraulic oil to a temperature of at least
71° ± 5°C (160° ± 9°F) . All systems on the machine must be warmed up to operating temperature. - Set the implement lockout switch to the LOCKED position.
- Make sure that the steering control lever is in the NEUTRAL position.
- Select the Engine ECM in Electronic Technician.
- Select the Service tab.
Show/hide table
Illustration 10 g02354856 - Select "Calibrations".
Show/hide table
Illustration 11 g03428242 - Select "Engine Cooling Fan Calibration".
- Follow the onscreen instructions for the "Set up calibration conditions" only.
Note: Do not complete the calibration procedure at this time.
Show/hide table
Illustration 12 g02354898 - Use the increment and decrement buttons at the bottom of the screen to adjust the fan current.
Show/hide table
Illustration 13 g03428270 - Use the buttons to move the slide bar until the current is set to 1.55 Amps or all the way to the right.
- Check the pressure at tooling (A). The pressure for minimum fan pump pressure should be
2000 ± 240 kPa (290 ± 35 psi) . - If the pressure is not within the specified limit, perform the Steps in "Adjustment Procedure - Minimum Pump Pressure".
Note: The maximum mechanical pump pressure adjustment and the minimum pump pressure adjustments influence each other. Whenever you adjust one pressure, always check the other pressure and then make any necessary adjustment.
- If the pressure is within the specified limit, perform the Steps in "Fan Speed Calibration".
Adjustment Procedure - Minimum Pump Pressure
- Perform the steps in the "Test Preparation" and then continue to the following steps.
Show/hide table
Illustration 14 g02506876 (2) Solenoid
(5) Locknut
(6) Adjustment Screw for Minimum Mechanical Fan Pump Pressure - Hold adjustment screw (6) in place and loosen locknut (5).
- Turn adjustment screw (6) clockwise to increase the pressure setting or turn adjustment screw (6) counterclockwise to decrease the pressure setting.
- Hold adjustment screw (6) in place and tighten locknut (5).
- Perform the "Test Procedure - Minimum Pump Pressure" again.
- When the pressure setting is within the specified limit, perform the Steps in "Test Procedure - Minimum Pump Pressure".
Note: The maximum mechanical pump pressure adjustment and the minimum pump pressure adjustment influence each other. Whenever you adjust one pressure, always check the other pressure and then make any necessary adjustment.
- Perform the steps in the "Test Preparation" and then continue to the following steps.
- Prepare the Multi-Tool Gp (D) to measure fan speed.
- Start the engine. Warm the hydraulic oil to a temperature of at least
71° ± 5°C (160° ± 9°F) .Note: The hydraulic oil temperature must be at least
71° C (160° F) to start the test. The calibration will continue even if the temperature falls below the starting value. - Set the implement lockout switch to the LOCKED position.
- Make sure that the steering control lever is in the NEUTRAL position.
- Select the Engine ECM in Electronic Technician.
- Select the Service tab.
- Select "Calibration".
- Select "Engine Cooling Fan Calibration".
Note: There are three different calibrations to run. Follow the onscreen instructions to perform the fan calibrations.
- Use tooling (D) to monitor the fan RPM.
Data Tables (For Reference Only)
The following data tables represent some of the logic that is built into ET and the ECM of the machine. Depending on the environmental variables and the altitude of the machine, ET will indicate a target RPM. Follow the onscreen prompts to match the RPM that the software indicates.
| Example | |||||
| D9T with a standard fan | |||||
| Target clip speed from Table 1 is 1200 rpm. | |||||
| Ambient temperature of |
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| Atmospheric pressure of |
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| The recorded correction factor from Table 1 is 1.02. | |||||
| The corrected target clip speed is: 1200 rpm × 1.02 = 1224 (+25/−0) RPM |
| Target Clip Speed Correction Factor | ||||||||
| Atmospheric Pressure | |
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| Altitude | |
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| Ambient Air Temperature | |
1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.01 | 1.01 |
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1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.01 | 1.02 | |
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1.00 | 1.00 | 1.00 | 1.01 | 1.02 | 1.03 | 1.04 | |
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1.00 | 1.00 | 1.01 | 1.02 | 1.04 | 1.05 | 1.05 | |
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1.01 | 1.02 | 1.03 | 1.04 | 1.05 | 1.06 | 1.07 | |
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1.02 | 1.03 | 1.04 | 1.06 | 1.07 | 1.08 | 1.08 | |
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1.04 | 1.05 | 1.06 | 1.07 | 1.08 | 1.09 | 1.10 | |
Test Procedure - Fan Reversing Relief Valve
Note: The fan reversing relief valve cannot be adjusted on the machine. The fan reversing relief valve has a setting that is higher than the maximum mechanical high-pressure setting and must be set at a corresponding flow rate. Use the following procedure to test and adjust this valve.
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| Illustration 15 | g02714860 |
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(7) Relief valves
(8) Locknut (9) Adjustment screw | |
- Remove the relief valves (7) from the reversing valve.
- Use the 257-5616 Test Manifold Block to test the fan reversing relief valves (7) on the test bench. Torque relief valves to
53 ± 3 N·m (39 ± 2 lb ft) .Note: The pressure setting for the valves (7) is
20700 kPa (3002 psi) under the following conditions:- SAE 10W hydraulic oil
-
65°C (150°F) - Flow rate at
4 L/min (1.10 US gpm)
Adjust Procedure - Fan Reversing Relief Valve
- If the fan reversing relief valves are not within the specifications, use the adjustment screw (9) to change the pressure setting until the specifications are met.
- Hold adjustment screw (9) in place and loosen locknut (8).
- Turn adjustment screw (9) clockwise to increase the pressure setting or turn adjustment screw (9) counterclockwise to decrease the pressure setting.
- Hold adjustment screw (9) in place and tighten locknut (8).
- Check the pressure.
Note: When the pressure setting is within the specified limit, install relief valves (7) into reversing valve. Torque the relief valves to
53 ± 3 N·m (39 ± 2 lb ft) .