Checking The Indicator Lights On Switch Panel; Checking The Transport Height Selector; Checking The Lower Speed Selector; Checking The Draft Control Operation - Valtra 6000 Workshop Manual

32. Electro---hydraulic power lift
D. Checking the indicator lights on switch
panel
--- Check that the position control indicator light (7) is lit when
the draft control selector (5) is in position P
--- Check that the draft control indicator light (8) is lit, when the
draft control selector is in position 1---5
--- Raise the lower links by rotating the position control
knob=red lift indicator light (6) is lit
--- Lower the lower links =green light (6) is lit
Note! The lift/lower indicator lights are connected in parallel
with the control valve solenoids. Therefore, if the indicator
lights are lit this means that the solenoids are receiving cur-
rent.
Note! Reconditioning indicator lights, see page 320/12.
E. Checking the transport height selector
--- Activate the control system (switch 2)
--- Rotate the transport height selector (4) to position 9
--- Rotate the draft control selector (5) to position P
--- Rotate the knob (1) max clockwise (to position 9)
The transport height selector (4) should at this point provide
6 different upper position for the lower links: the maximum
upper position 9 (where the cylinder stroke is 181 ---183 mm)
and five lower positions, but not the lowest position
Checking the selector, see instruction on page 320/10.
F. Checking the lower speed selector
--- Activate the control system (switch 2)
--- rotate selector (5) to position P
--- rotate selector (4) to position 9
--- rotate selector (3) to position 6 (max lowering speed)
--- connect an enough heavy load to the three ---point linkage
Put the lift/lower switch (2) in the lifting position, so that the
lower links are raised to an upper position. Lower them by put-
ting the switch in the lowering position and use a timer to
measure the lowering speed. Six different speeds should be
found according to the position of the selector (3) (1=slowest,
6=fastest)
Note! The lowering speed for the slowest position (1) should
be at least 6 seconds regardless of the load.
If the lowering speed control is out of order, the lowering
speed will be the maximum (pos. 6).
Checking the switch panel, see page 320/10.
Model
8. 11. 1990
15. 4. 1995
G. Checking the draft control operation
When the draft control is in use (Eg. during ploughing), the lift
and lower indicator lights will flash. If the draft control is out of
order, the power lift operates in the position control mode (as
if selector were in position P .
Quick checking of the draft control ranges
--- start the engine and activate the power lift (switch 2)
--- use the position control knob (1) to set the lower links to
position 4 (selector (5) in position P)
--- stop the engine but leave the ignition on
--- turn the draft control selector to position 2
--- use the position control knob to stop the power lift fairly near
the beginning of the lift cycle, ie. rotate the knob until the lift
and lowering indicator lights are off, fairly close to the area
where the lift light is lit
--- turn the draft control selector to position 3. The lift indicator
light should now be lit
--- again use the position control knob to stop the power lift.
--- turn the draft control selector to position 4. Now the lift indi-
cator light should be lit
--- use the position control knob to stop the power lift and turn
the draft control selector to position 5. Once again, the lift indi-
cator light should be lit.
Note! The graduation between the areas 3 and 4 is greater
than elsewhere. It can be tested by turning the draft control in
area 3 a little further to the lowering side. Returning to area 4,
the lift indicator light is lit again.
Note! Checking draft control selector (switch panel), see
page 320/10.
Simple instructions for checking the operation of
the draft sensors
--- turn the draft control selector to position 5
--- use the position control knob to lift the implement (but not
to the limit)
--- lock the right side check link and release the left one
--- from the rear of the implement push the implement to the
right. If the left draft sensor is operating, the red lift indicator
light will flash, when the implement is being pushed against
the check link
--- test the right side sensor in a similar way
H. Three ---position lift/lower switch and
forced ---lowering switch
Note! From the beginning of the year 1994 (AC II) the lift/lower
switch has three position. The intermediate position stops the
lower link movement. The other two positions are the same as
before.
Note! With effect from serial no 668103 (AC 2.1) the power lift
has a forced ---lowering switch on the RH side of the position
control knob, see page 320/15.
295
Code Page
6000-- 8400 320 9