2003/01/27 Caterpillar

A New Hydraulic Calibration Procedure Is Used On Forest Machines Equipped with Harvester Hydraulics {5051}

Usage:

Excavator: 320C (S/N: BGB1-UP; BKK1-UP)

Procedure

Adjustment Procedure Using Caterpillar Electronic Technician

A new hydraulic calibration procedure is used on the 320C Forest Machines that are equipped with Log Max HH700 and HP750 heads. This calibration procedure establishes new baseline controller settings to ensure proper operation of the Log Max heads.

The new calibration procedure is adaptable to the first production of the machines that are listed and equipped with 161-9407 Auxiliary Control Arrangement. The Auxiliary Control Arrangement is not serviced at this level.

Caterpillar Electronic Technician is utilized in order to access the diagnostic utilities within the machine controller.

Access the menu option in order to calibrate the NFC PRV (EPRV).
Note: This procedure will prompt you for the low and high setting.
Note: The system default setting for the low setting is 1.5 Mpa. The default setting will not provide proper range of operation.

Enter 145 psi (1 Mpa) for the low setting and accept the program default for the high setting. This will set the range of operation for the PRV.

Adjustment Procedure Using the Monitor

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Illustration 1	g00863995

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Illustration 2	g00950156

Go to main menu (1) of the tool control and choose "Service Options" (6) .

When the password screen appears, enter "FFF2" and then press button (41) .

Press the down arrow button (37) in order to highlight "ECM SUMMARY" (11) .

Press the right arrow button (37) in order to scroll to "CALIBRATION" (21) .

Press the down arrow button (37) in order to highlight "GOVERNOR" (22) .

Press the right arrow button (37) in order to scroll to "NFC PRV" (25), press button (39) .

Press the down arrow button (37) in order to highlight "PARAMETER VALUE", press button (41) .

Press button (39) in order to reset the value.

With "MAX" highlighted press the left and right arrow buttons (37) .

Go to "MIN" and reset this value in the same way that "MAX" is reset.

Set "MAX" at 0 (425 psi) and "MIN" at -8 (155 ± 5 psi).

Note: After NFC PRV calibration, use the following procedure and values as a baseline for controller settings for the Harvester hydraulics.

Procedure for Changing the Controller Settings Using the Monitor

While still in service mode, highlight "CONFIGURATION" (32) and press right arrow button (37) in order to scroll to "TOOL PROGRAM" (34) .

Press the down arrow button (37) in order to highlight "TOOL #1". Press button (39) in order to shift the highlight to the side to "001".

Press the right arrow button (37) in order to scroll to the parameter you want to change. Press the down arrow button in order to highlight the value.

Press the left or right arrow buttons in order to change the value. Press button (38) in order to enter a new value. You will know if the controller has accepted the value when the blue highlight appears and the new value is displayed. Parameters 003-005 are set similarly from "TOOL PROGRAM".

Exit the program by pressing the up arrow button (37) twice and the right arrow button (37). Press button (38) .

Press button (41) in order to return to the normal running mode screen. The word LOGMAX should be displayed, plus the normal information of time and travel mode.

Configuration Setting

Note: "CONFIGURATION 101" must me set to "NACD HAMMER". "TOOL SELECT 001" must be set to "LOGMAX". Also, the "TOOL INDICATOR" (33) should be set to "ENABLE" (36).

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Table 1
Configuration Data
ID Number	Parameter Value	Configuration Parameters
101	NACD HAMMER	Name (machine application)
102	NOT INSTALLED	ATT controller (installation status)
103	INSTALLED	Flow limit EPRV installation status
104	F2 ONE or TWO	Attachment Valve 1 Configuration
105	F2 ONE or TWO	Attachment Valve 2 (Configuration)
106	F4 ONE or TWO	Attachment Valve 3 (Configuration)
107	F3 ONE or TWO	Attachment Valve 4 (Configuration)
108	VALVE 2 COMBINE	Attachment Valve 1 Combine (Configuration)

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Table 2
Tool Configuration
ID Number	Parameter Value	Tool Parameters
001	Log Max	Enter the Name of the Tool
002	10	Upper Limit of the engine speed dial during tool operation
003	ON	ON/OFF of the above function
004	OFF	ON or OFF the stop function of the underspeed function
005	OFF	ON or OFF of 2 pump (combine flow control)
006	OFF	Setting the initial reduction horsepower for the third pump
007	OFF	Setting of the final reduction horsepower for the third pump
008	OFF	Flow control return circuit change over setting
009	OFF	Variable relief valve 1 (pressure setting)
010	OFF	Variable relief valve 2 (pressure setting)
015	OFF	Squeeze reduction target (pilot pressure)
016	OFF	Squeeze reduction initial load pressure
017	OFF	Squeeze reduction final load pressure
101	110	Spool 1 (flow setting) High pressure functions
102	0	Additional flow during simultaneous operation of spool 1
103	16000	Spool 1 (calculation pressure)
104	-	Spool 1 switch open time
105	-	Spool 1 switch close time
106	16000	Upper limit pressure of spool 1 extension side
107	16000	Upper limit pressure of spool 1 retraction side
201	140	Spool 2 (flow setting) Medium pressure functions
202	0	Additional flow during simultaneous operation of the tool and the other actuator in spool 2
203	16000	Stacked auxiliary control valve calculation pressure
204	-	Spool 2 switch open time
205	-	Spool 2 switch close time
206	16000	Upper limit pressure of spool 2 extension side
207	16000	Upper limit pressure of spool 2 retraction side
301	190	Spool 3 (flow setting) Hold and Travel
302	0	Additional flow during simultaneous operation of the tool and the other actuator in spool 3
303	16000	Spool 1 (calculated pressure)
304	-	Spool 1 switch open time
305	-	Spool 1 switch close time
306	16000	Upper limit pressure of spool 1 extension side
307	-	Spool 1 switch close time

Note: For functions 101, 201, 301 a lower setting will generate greater flow. For example, if a 101 setting of 110 results in poor head or carrier multifunction capabilities, increase the setting in order to reduce flow to the head.