82
Section 3 - operation
3.8 hydraulic System cold weather warm up procedure
Starting the RH7500 improperly in cold weather (below 68
O
F [20
O
C] will cause significant and po
-
tentially catastrophic damage to the hydraulic system.
Always perform this warm up process before any operational functions if the time lapse since the last
cutter system operation is more than 30 minutes and outside temperature is below 68 degrees F.
1. Make sure the truck transmission is in neutral, park brake is on, and the engine speed is less
than 800 rpm. Do not increase engine rpms above lowest possible idle during this procedure.
2. Press Power on the Joystick Box
3. Press Truck PTO
4. Press OMSI PTO
--DO NOT INCREASE ENGINE RPM--
Engine speed must remain at low idle.
5. Do not press Mode
6. Press Drive on Allison Transmission controller & verify 6/1 on Allison Display. If the display shows
4/4 you must return to neutral and turn off the Mode Switch.
7.
DO NOT INCREASE ENGINE RPM
. Engine speed must remain at low idle.
8. Turn the blower on (if you don’t have this option skip this step)
9. Turn the cutter drum on
10.
DO NOT INCREASE ENGINE RPM
. Engine speed must remain at low idle.
11. Stay parked in this condition until hydraulic oil warms to greater than 68
O
F (20
O
C).
Once the oil has warmed above 68
O
(20
O
C) follow these next steps
12. Put the Allison Transmission in Neutral
13. Press Mode
14. Press Drive on the Allison Transmission controller & verify 4/4 on Allison Display
15. Do not increase engine rpm.
ENGINE SPEED MUST REMAIN AT LOW IDLE
.
16. Release the parking brake
17. Select forward on the Joystick Box
18. Slowly turn the potentiometer to start moving the truck forward. Do not exceed 50% on the dial.
19. Move the truck in this manner for at least 500 feet. It will intentionally move extremely slow.
20. Make sure that the hydraulic oil is still above 68
O
F (20
O
C).
21.
Confirm that the temperature of all hydraulic motors is above 68
O
F (20
O
C) degrees Fahrenheit.
When you stop working for any length of time you must keep the machine running
in Work mode to keep all components warm and at the same temperature.
WARNING
CIRCUMVENTING ANY PORTION OF THIS PROCEDURE WILL CAUSE CATASTROPHIC
FAILURE IN THE HYDRAULIC PUMPS AND MOTORS. THIS TYPE OF FAILURE EXHIBITS
DISTINCT CHARACTERISTICS AND WILL NOT BE COVERED UNDER WARRANTY.
Содержание RH7500
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