JLG 4017PS Service Manual - Manual (Page 103)

5-7 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
Axles, Drive Shafts, Wheels and Tires
5.6.1 Park Brake Test
The following procedure is used in order to determine if
the parking brake is functional. This procedure is not
intended to measure the maximum brake performance.
Note: Refer to Section 9.4.1, “Keypad,” for additional
information.
Note: The hand held Analyzer can also be used if
desired.
1. Verify the machine is on a dry, level surface and the
test area is clear of personnel and obstacles.
2. Engage the park brake and start the machine.
3. Access Level 3 on the display screen.
4. Select PARK BRAKE TEST from the calibration
menu.
5. The operator will be asked: PERFORM PARK
BRAKE TEST? To begin the test, press the Enter
button.
Note: Pressing the ESC button will return the operator
back to the CALIBRATIONS menu.
Note: If there is an active fault pertaining to a drive
direction or gear selection inputs, the analyzer will not
permit the test to be run and show PARK BRAKE TEST
FAILED.
6. With the park brake test now running, the analyzer
will prompt the operator to SET PARK BRAKE.
Note: If J4-5 is LOW when the operator presses the
Enter button, the control system will respond with a
PARK BRAKE TEST FAILED message and any
concluding button press will return the analyzer back to
CALIBRATION: PARK BRAKE TEST menu screen.
7. If J4-5 is HIGH when the operator presses the Enter
button, the analyzer will prompt the operator to Shift
To Second Gear.
Note: If J4-11 is LOW or J4-11 is HIGH and one of the
other gear select inputs is HIGH when the operator
presses the Enter button, the control system will respond
with a PARK BRAKE TEST FAILED message and any
concluding button press will return the analyzer back to
CALIBRATION: PARK BRAKE TEST menu screen.
8. If J4-11 is HIGH when operator presses the Enter
button, the analyzer will provide the following
information: WARNING: DRIVE WILL BE
ENGAGED for a period of 2 seconds and then
display the following information: FORWARD TO
START (first line) NEUTRAL TO PAUSE (second
line).
9. If the control system receives a valid drive
FORWARD signal in this test mode, the
transmission neutralize state will be overridden (act
as the park brake is not set) and drive will be
engaged. If the control system receives a valid drive
NEUTRAL signal in this test mode, the transmission
neutralize state will be engaged (normal operation).
10. Gradually increase the engine speed to high idle.
The machine should not move.
11. Reduce engine speed to low idle. Move transmission
control lever to the neutral position.
Note: If the machine moved during the PARK BRAKE
TEST, refer to Section 5.5.3, “Mechanical Park Brake
Adjustment,” and re-test.
Note: If J4-5 goes LOW or J4-11 goes LOW or an active
fault pertaining to the drive direction or gear selection
inputs become active in this test mode, the test will be
stopped and the control system will respond with a
PARK BRAKE TEST FAILED message and any
concluding button press will return the analyzer back to
CALIBRATION:PARK BRAKE TEST menu screen.
12. If the ESC or Enter button is pressed at this stage,
the control system will stop the test and respond with
a PARK BRAKE TEST COMPLETE message and
any concluding button press will return the analyzer
back to CALIBRATION: PARK BRAKE TEST menu
screen.
13. With the PARK BRAKE TEST complete, engage the
park brake, shut engine OFF.
WARNING
If the machine begins to move during the PARK
BRAKE TEST, reduce engine speed to low idle and
apply the service brakes.