HARDI-EVRARD ALPHA PLUS 4100 - Mobile Unit and Boom Control Troubleshooting; Mobile Unit Operation Faults; Boom Control Distributor Faults

ALPHA PLUS HARDI NOVA
FF AA UU LL TT SS II NN OO PP EE RR AA TT II OO NN
CHAPTER
66-
8
66-
22
-
33
BBOOOOMM CCOONNTTRROOLL DDIISSTTRRIIBBUUTTOORR
AA
BB
DD
CC
AA
Boom control distributor
Boom control by-pass
Warning control Led
Boom relieve valve (
118800 bbaarr mmaaxxii
)
CC
BB
DD
The mobile unit is moving when the advance lever
is on neutral position
The machine does not moving
The speed of mobile unit is unstable
The speed of mobile unit is too slow
Hydraulic circuit too warm
No control of the hydraulic boom functions
1- Faulty hydraulic system
2- Faulty of electrical system
- Adjust the neutral position switch
(do not adjust the connecting rod between the joystick lever and the
controller).
- Check the mechanical neutral position of the hydrostatic pump.
- Check fuse
(n°16) .
- Check the parking brake is deactivate
- Check by means the manual servo
- Check the feeder pressure (about 30 bar) .
- Check the high pressure circuit
- Check the battery
- Check the voltage control unit
- Check hydraulic filters
- Check the H.P. valves
- Check the feeder pressure
- Check leak of internal componants (hydrostatic pump, motors, etc...).
- Check the oil level in the reservoir
- Clean the oil radiator (see engine manual ).
- Check H.P. valves and leak of internal componants
- Check if the safety road switch is deactived
- Check manually distributor, by pressing the manual control of the
distributor and by-pass.
In this case the LED of distributor and by-pass are lights up :
- Check the pressure, the restrictor of the ram, the coil of the distribu-
tor.
In this case the LED of distributor and by-pass are lights off :
- check battery, fuse, the control switch
- Check the electrical circuit.
PROBLEMS
SOLUTIONS