Figure 1. Transmission
1. 2 ---step quick ---shift gear (same as on
0 5 --- s e r i e s )
2. Solenoid valve for quick--- shift gear
3. Switch on the speed gear lever knob
4.Servovalveblock
731
Model Code Page
15. 5. 1993
6000--8750
7440
44. Quick---shift gear, reverse shuttle
and 4WD clutch
8. 11. 1990
2 --- s t e p q u i c k --- s h i f t g e a r, d e s c r i p -
tion
1
2
3
4
The quick---shift gear is fitted in front of thereverse shuttle.The
quick---shift gear is connected to the clutch shaft by means of
a coupling sleeve. The quick---shift gear can be either a reduc-
tion gear or an overdrive according to the tractor model.
Quick---shift gear is engaged and disengaged electro---hy-
draulically with a switch on the gear lever knob. The quick---
shift gear can be engaged while driving without using the
clutch pedal. The solenoid valve for quick---shift gear is fitted
on the quick---shift gear cover.
Clutch pressure is directed to the quick---shift gear from the
servo valve block on the LH side of the gearbox. The low pres-
sure pump supplies oil to the valve block. Clutch pressure is
1,8 MP a which is limited by a pressure---relief valve on the
servo valve block.
Quick---shift gear has pressure lubrication (see figure 3 on
page 440/10).
To facilitate gear changing (reduction of the rotating mass),
the quick---shift gear always moves to shifting position when
the clutch pedal is pressed down.
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