Safety 39
4. If the hydraulic system is still operative, the Hopper Door proximity switch may need to be
adjusted or replaced. Refer to the Limit and Proximity Switches section in the Maintenance Manual
for proper procedure.
Arm Fully Retracted Limit Switch Test
Successful completion of this test ensures that the Arm Extended warning lights on the dashboard
flash red when the arm is moved away from its parked position.
For this test, proceed as follows:
1. Park the vehicle on safe, level ground.
You should have sufficient room to drive approximately 100 yards (92 m) forward.
2. Extend the arm a few inches.
3. Check that the Arm Extended warning lights on the dashboard (see Figure 3-30) flash red.
4. Drive the vehicle forward and increase engine speed to over 1,000 RPM.
5. Check that the buzzer sounds and the warning message “Arm not Stowed” appears on the
monitor screen.
6. Stop the vehicle and retract the arm to its “home” position. The “Arm Not Stowed” message on
the monitor screen should disappear and the warning lights should turn off.
The buzzer should also stop sounding.
7. If the Arm Extended warning lights on the dashboard do not flash red or the “Arm Not Stowed”
message does not appear on the monitor screen when the arm is extended and the vehicle engine
exceeds 1,000 RPM, the Arm Fully Retracted limit switch (see Figure 2-12) may need to be
adjusted or replaced. Refer to the Limit and Proximity Switches section in the Maintenance
Manual.
IMPORTANT: Do not operate the 2R-III
TM
with an inoperative or malfunctioning arm limit switch. Injury or death
may occur.
NOTE: On units with a bucket, the arm cannot be extended. If the bucket is down against the bucket
stopper and the truck is rolling faster than 25 km/h, the in-cab buzzer will sound. In such a
situation, the operator has to pull over in a safe and convenient location and raise the bucket
until it is safely parked inside the hopper.
Warning!
Never drive the vehicle if the automated arm is not parked alongside the truck. The vehicle
would be too high and/or too wide to be driven safely. Failure to fully retract the arm could
result in unit and/or property damage, personal injury or even death. Warning lights on the
dashboard flash red when the arm is extended.
NOTE: On units equipped with a bucket, the
arm cannot be extended with the joystick. However, if for any reason, the arm is somewhat
extended due to bumpy roads for example, just retract it tight against the bucket stopper by
moving the joystick sideways to the left.
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