3-21
Temperature increases in the converter oil as well as overheated brakes will be the
consequences to be find out later.
Neutral position of the selector switch at higher machine speeds (above stepping speed) is not
admissible.
Either a suitable gear is to be shifted immediately, or the machine must be stopped at once.
Independent calibration of the shifting elements
Independent calibration of the shifting elements (AEB)
The AEB has the task to compensate tolerances (plate clearance and pressure level) which are
influencing the filling procedure of the clutches. For each clutch, the correct filling parameters are
determined in one test cycle for :
·
Period of the quick-filling time
·
Level of the filling compensating pressure
The filling parameters are stored, together with the AEB-program and the driving program in the
transmission electronics. Because the electronics will be separately supplied, the AEB-cycle
must be started only after the installation of both components in the machine, thus ensuring the
correct mating (Transmission and electronics).
It is imperative, to respect the following test conditions :
- Shifting position neutral
- Engine in idling speed
- Parking brake actuated
- Transmission in operating temperature
After a replacement of the transmission, the electrohydraulic control or the TCU in the machine,
the AEB-cycle must be as well carried out again.
The AEB-cycle continues for about 3 to 4 minutes. The determined filling parameters are stored
in the EEProm of the electronics. In this way, the error message F6 shown on the display will be
cancelled also at non-performed AEB.
Pressure cut-off
Pressure cut-off
In order to provide the full engine power for the hydraulic system, the control can be enlarged for
the function of a pressure cut-off in the 1st and 2nd speed. In this way, the pressure in the
powershift clutches will be cut-off, and the torque transmission in the drive train will be eliminated
by it. This function will be released at the actuation of a switch, arranged on the brake pedal.
For a soft restart, the pressure will be build-up via a freely programmable characteristic line.
(4)
(4)
※
※
(5)
(5)
Summary of Contents for HL955
Page 557: ...7 6 MEMORANDUM MEMORANDUM ...
