Valtra 6550 - Functional Check

Figure 2. Inputs and outputs to/from the ECS
for controlling the 4WD
Figure 3. Inputs and outputs to/from the ECS for
controlling the differential lock
366
Model Code Page
34. Autocontrol ---III
8. 11. 1990
6600E, 8100E 341 4
15. 6. 1992
3. Functional check
(Fault tracing with a microcomputer, see under code no 342)
A. Front wheel drive
--- start the engine (tractor stationary and the brake pedals are
not pressed).
--- s e t t h e 4 W D r o c k e r s w i t c h t o M --- p o s i t i o n
--- engage and disengage the 4WD with a switch on the range
gear lever knob. Indicator light comes on in the engaged posi-
tion.
--- disengage the 4WD
--- press brake pedals (latched together) at which time the
indicator light should be lit
--- release the brake pedals and the indicator light goes out.
--- press one brake pedal. Ind. light must not come on.
--- engage the 4WD with the switch on the lever knob and the
ind. light comes on.
--- turn the 4WD rocker switch to the A ---position and the ind.
light should go out.
--- t h e 4 W D e n g a g e s ( A / M --- s w i t c h i n A --- p o s i t i o n ) w h e n t h e
clutch pedal is released rapidly. Declutch (wheels stop) and
after 8 seconds the 4WD must be disengaged.
B. Differential lock
--- start the engine (tractor stationary and the brake pedals are
not pressed).
--- s e t t h e d i f f . l o c k r o c k e r s w i t c h t o M --- p o s i t i o n
--- engage and disengage the lock with a switch on the reverse
shuttle lever knob. Indicator light comes on in the engaged
position.
--- engage the diff. lock with the lever knob switch
--- press the brake pedal/pedals (both separately and latched
together) and the ind. light goes out
--- release the pedal/pedals and the ind. light comes on.
--- turn the diff. lock rocker switch to A ---position and the ind.
light goes out
--- remove fuse F13 (brake lights). Unlatch the brake pedals.
--- drive the tractor (front wheels straight ahead) and brake one
rear wheel at which time the diff. lock indicator light comes on
--- while the ind. light is on, turn the front wheels over ±10˚,
and the diff. lock ind. light should go out.
--- Turn the front wheels straighter (further pressing one brake
pedal) and the diff. lock ind. light comes on
--- stop the tractor and the diff. lock disengages