Valtra VALMET 6000, Workshop Manual

Page: 332 / 1361

303
Model Code Page
32. ACB/ACD electro---hydraulic power lift
1. 6. 1999
6250--8950 321 1
1. 11. 1998
Valtra---Valmet 8450 , 8550, 8750 and 8950 tractors have as standard ACD power lift. Basic functions of the ACD are the
same as described under code 320 showing Autocontrol power lift. ACD power lift is available as an alternative equipment
also for other Mezzo---tractors. On E---models the ACD power lift is a standard equipment. Under this code are shown differ-
ences between Autocontrol power lift and ACD power lift.
Important!
On HiTech tractors 6250---8150 there is as standard ACB power lift, which cannot be equipped with slip control
and auxiliaty sensors cannot be connected. In addition, the engaging speed of the Drive Balance Control cannot be adjusted,
but it is always engaged in the transport position, when the tractor is moving (can be switched off with a selector). The ACB
power lift has not an indication light for the draft control mode. Note! 6200---8150 AC 2.2 tractors have as standard the ACB ---
power lift. ACB power lift can be recognized by letter B on the switch panel.
A. ACB / ACD power lift
--- ACD and ACB power lift has a digital control unit
--- Position sensor is different as on AC power lift.
--- ACD and ACB power lift has as standard a Drive Balance Control, which damps in transport driving oscillation movements
of the tractor caused a heavy implement which is attached to the three point linkage unit.
--- A slip contror is available as an option (not ACB), which includes also a radar. The radar is the same as on AC III and AC
IV units.
--- For the slip control and Drive Balance Control the tractor has a gearbox speed sensor (not ACB) on the RH side of the
shuttle unit. The sensor is the same as on AC IV unit and on Agrodata---instrument.
--- The ACB and ACD power lift switch panel has a diagnostic light, which indicates self---testing and locking of the power lift
and it indicates with flashing numbers of fault codes so that possible faults can be localised. The flashing of the diagnostic
light also confirms that a new switch---on frequency of the Drive Balance Control is valid (not ACB).
--- Lowering speed selector and draft control selector have more positions than earlier.
1
2
3
4
5
6
7
8
9
10
Picture 1. ACD power lift switch panel (ACB has not an ind. light 7 and selector 4 has not the slip control position)
1. Lowering speed selector (9 positions)
2. Transport height selector (9 position)
3. Position control/Draft control selector (position P is for position control. The draft control has 6 different positions
4. Drive Balance Control/Slip Control
--- OFF; Drive Balance Control and slip control are switched off
--- Drive Balance Control switched on
--- Both Drive Balance Control and Slip Control switched on (not ACB)
--- Position in picture; Slip control switched on (if fitted)
5. Indication light if slip control fitted
6. Indicator light, Drive Balance Control switched on
7. Indicator light, Draft control is switched on (positions 1---6) (not ACB)
8. Diagnostic light
9. Indicator light, lifting
10. Indicator light, lowering
Note! The functions of the position control potentiometer, lifting/lowering switch and the forced---lowering switch are the same
as earlier (see code 320). The bush buttons in the cab have been replaced with one rocker switch, but the function is the
same as earlier (also on Autocontrol power lift). There are bush buttons on the rear mudguards. The draft sensors are the
same as earlier, see page
320/7
. Checking the function of the ACB and ACD power lifts, see page
321/14
.