Yale E878, Руководство по обслуживанию

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Proc_Cal_006: Tilt Back Valve Output Threshold
WHEN TO PERFORM
Performed when troubleshooting procedures indicate,
when tilt back valve components have been serviced,
or when the tilt back valve is replaced.
CALIBRATION ORDER
1. Proc_Cal_025
2. Proc_Cal_001
3. Proc_Cal_002
4. Proc_Cal_006
WHY PERFORM
All electro-hydraulic valves have different operating
characteristics. One of the key characteristics is the
point at which hydraulic flow begins for a given com-
mand current. This cracking' current is determined by
this process.
HOW TO PERFORM
WARNING
Keep yourself and all others clear of the lift mech-
anism. Never allow anyone under or on the forks.
Never put hands, arms, head, or legs through the
mast or near the carriage or lift chains. This warn-
ing applies not only to the operator but also the
helper. A helper must not be near the load or the
lift mechanism while the operator is attempting to
handle a load. The lift mechanism has moving
parts with close clearances that can cause seri-
ous injury.
Refer to Table 8 for the procedures on how to perform
Proc_Cal_006: Tilt Back Valve Output Threshold.
Table 8. Proc_Cal_006: Tilt Back Valve Output Threshold
A. TYPICAL DISPLAY WITHOUT KEY, WITH OPTIONS
B. TYPICAL DISPLAY WITH KEY, WITHOUT OPTIONS
Perform Proc_Cal_025: Hydraulic Valve Pressure Gage Installation, Proc_Cal_001: Service Password En-
try, and Proc_Cal_002: Hydraulic Valve Calibration Warm Up and Air Bleed before proceeding.
Information: "Creep" is defined as the threshold when a function first starts to move very slowly (barely percepti-
ble motion). The identification of this motion is defined as the "visual method." The method that provides more
consistent calibration is by monitoring the change in pressure when the function is activated; this is defined as
the "pressure method."
Proc_Cal_006: Tilt Back Valve Output Threshold 8000 YRM 1134
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