1
2
3
736
Model Code Page
6000--8750
12440
44. Quick---shift gear, reverse shuttle
and 4WD clutch
1. 1. 1994
15. 5. 1993
3 --- s t e p q u i c k --- s h i f t g e a r ( D e l t a
Powershift), description
Note! The 3---step quick---shift gear Delta Powershift can be
fitted on 6000---8400 tractors with effect from ser. no. 660071.
The 3---step quick---shift gear (1) is fitted in front of the reverse
shuttle and it is connected to the clutch shaft by means of a
connecting sleeve.
The different speeds are engaged/disengaged electro---
hydraulically with the rocker switch (3) (or with push buttons)
in the speed gear lever knob. All speeds can be engaged/
disengaged during driving without using the clutch pedal.
The solenoid valves (2 pcs) are fitted on the servo valve block
(2).
Clutch pressures are directed to the gear from the servo valve
block (2). The low pressure pump supplies oil to the valve
blockwhich has an in---built pressure---limiting valve with ope-
ning pessure of 1,8 MPa.
When the rocker switch (3) is operated the solenoid valves
open o r close and send pres sure to the multi disc clutches.
The clutch pressure pipes are external pipes and they run
from the valve block to the gear housing connectors.
When the clutch pedal is depressed (switch on the pedal), the
current to the solenoids is switched off and then the gear is
in the neutral position when the rotating masses are in mini-
mum to facilitate an easier gear changing. This is the same
when the current is switched off with the starter switch. When
parking the tractor and the current is switched off, the parking
brake must always be applied,since the engaged speed gear
does not keep the tracto r stationary.
Picture 4. 3 --- s tep q u i c k --- s h i f t ge a r
1. Delta Powershift.
2. Servo valve block.
3. Quick shift gear rocker switch in the gear lever
knob. The switch has 3 different positions. Push
buttons, see Autocontrol II under code 311.
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