Recalibration is done through the dash monitor in service mode. The prv is a solenoid on the pilot manifold near the little round bulb thing ( accumulator) down below the main pumps.
Start-Up Of The Service Mode
Illustration 2 g00662936
Electronic Monitor Panel
(2) Character display
(22) Travel alarm cancel switch
(23) Boom priority mode switch
(24) Swing priority mode switch
(25) Fine control mode switch
(26) User mode switch
Note: The engine can be running or the engine can be stopped, when the "Service Mode" is started. When the engine is stopped, the starter switch must be in the ON position. You should know the procedure to start up the "Service Mode" in advance.
The following switches should be depressed and held for 2 seconds or more simultaneously: travel alarm cancel switch (22), fine control mode switch (25) and user mode switch (26) .
The time display and the dial display on the character display (2) will change to a "0" and a "0". The left character position will flash.
You need to enter the following security code: OE 32 3A.
Note: The security code must be entered within 10 seconds after the first procedure (1). Otherwise, the time display will return. You should learn the procedure of entering the security code in advance.
The procedure to input information is listed:
The figure that is blinking on the character display (2) can be changed. In order to change the figure, you should depress the boom priority mode switch (23) or the swing priority mode switch (24).
The figure that is blinking increases (Boom priority mode switch (23) )
The figure that is blinking decreases (Swing priority mode switch (24) )
The character position that is blinking can be shifted by depressing the fine control mode switch (25) or the user mode switch (26).
The character position that is blinking shifts to the right (Fine control mode switch (25) ).
The character position that is blinking shifts to the left (User mode switch (26) ).
After you enter the security code, the service mode is activated by depressing and holding the following switches for 2 seconds or greater: travel alarm cancel switch (22), fine control mode switch (25) and user mode switch (26). The service mode is automatically activated 10 seconds after the security code is entered.
Now, the "Service Mode" is activated and the character display (2) will display "10" on the left two character positions and "1" on the right character position.
Changing The Service Mode
The boom priority mode switch (23) or the swing priority mode switch (24) is pressed in order to change the figures that are blinking on character display (2) .
The figure that is blinking increases (Boom priority mode switch (23) )
The figure that is blinking decreases (Swing priority mode switch (24) )
The position that is blinking on the character display (2) can be shifted by depressing the fine control mode switch (25) and the user mode switch (26) .
The position that is blinking shifts to the right (Fine control mode switch (25) )
The position that is blinking shifts to the left (Swing priority mode switch (24) )
Note: Refer to the chart of Service Codes for selecting the functions for the "Service Mode".
Table 1
Service Code Function
10 Automatic Travel Speed Change
11 Low Temperature Control
12 Engine Speed
13 Engine Coolant Temperature
14 Hydraulic Oil Temperature
16 Digital Input
17 Software Version
18 Real Time Error Code
19 Error Log
1a Engine Speed Dial Setting Check
1b Model Name and Engine Type
1c Real Time Error Code (ATT)
1d Error Log (ATT)
20 Power Shift Pressure Command Signal
21 Displays Higher Delivery Pressure Of Main Pumps
60 Proportional Reducing Valve Sweep Test
61 Governor Actuator Sweep Test
62 ON/OFF Test Of Digital Output
66 Fixed Power Shift Pressure
67 Engine Speed Change
70 Governor Actuator Calibration
71 Proportional Reducing Valve Calibration
80 Setting Of Hydraulic Oil Type Mineral Or Biological
81 Setting Of AEC Speed
82 Setting Of AEC Delay Time
83 Setting Of Memory Mode
84 Setting Of Reduced Horsepower For Attachment Pump
85 Setting Of Engine Speed For Low Idle Switch
86 Setting Of Pump Quantity For Hammer Mode
87 Setting Of Hammer Circuit Pressure
88 Setting Of Pump Flow For Hammer Mode
8a Setting Of Power Offset For Attachment Pump
8b Change Of Preset Conditions Of Main Pump Output
8c Change Of Upper Limits Of Preset Conditions Of Main Pump Output (Such As Power Mode Or Engine Speed At Dial Position 10)
Procedure To Stop The Service Mode
Note: One of the following two methods should be used.
Turn the starter switch to the OFF position.
The following switches should be depressed and held simultaneously for 2 second or more:
(22) Travel alarm cancel switch
(25) Fine control mode switch
(26) User mode switch
The service mode has been stopped, if the character display shows the position of the engine speed dial on the right two character positions and the time is shown on the left four character positions.
