— Do not use any arc-welding set in proximity to electric systems.
— Usually sensors are mounted at gauged distances. Do not replace washers or vary locknut distances.
— Prevent short circuits or inversions of polarity.
— When having to operate with microprocessor-controlled devices or systems, never disconnect them when still
energized, first turn the ignition key into "STOP" position.
— Should the tractor be submitted to a new baked finish, it is recommended to remove all electronic apparatuses
from the tractor.
— Never drive any tester prods into either connector or apparatus multiple taps (as these tend to deformation thus
endangering the contacts).
— Avoid checking voltage by sparking, that is by generating a short circuit between cables or toward the earth.
— Never reverse the polarity or exchange wire position in multiple connectors.
HOW AN ELECTRONIC SYSTEM MUST BE INSPECTED
Elements to be inspected:
— Sensors
— Electronic control units
— Actuators
1) Check for proper system power supply as follows:
— Current attains the connector inserted into the apparatus;
— Current attains connector;
— Earthing;
— Correct voltage rating.
2) Check downstream components: sensors.
3) Check upstream components.
CHECKING MECHANICAL PARTS
Check that the external and internal lift arm splines are free of dents or any serious signs of wear; if these are discernible,
the levers must be replaced.
Inspect the bushes supporting the lift arms cross shaft; there should be no scoring or evidence of excessive wear.
Inspect the lift arm/assistor cylinder pivot bushes; these must be free from signs of wear and securely seated in the
relative bosses.
Check the diameters of the cylinder rods and glands, comparing them with the values indicated in the tables of maximum
permissible wear limits.
Verify then the splines of the lifting shaft; there should be no excessive wear and the shaft journal surfaces must be
not damaged.
NB: Whenever cylinders are stripped down for inspection and servicing, the seals must be replaced.
FITTING THE LIFT ARMS CROSS SHAFT CRANK LEVER SET SCREW
Follow the same directions as given on page 265, in the “mechanical lift system” chapter.
59
5
vehicle
electronic power-lift
260
www.maskinisten.net
www.classicmachinery.net
To Next Page
Loading...
Need help?
General
