7-M3
L2800, L3400, WSM
STEERING
(2) Operation
â– Neutral Position
While the steering wheel is not moved, the torsion bar
(2) is not twisted. There is no gap between the input
shaft (1) and sleeve (3). This makes no pressure
difference between the chambers "a" and "b" of the
cylinder, which keeps the ball nut (4) and sector shaft (6)
in their positions.
W1013776
â– Left Turn
When the steering wheel is turned left, the initial
friction between the tires and the road surface keeps the
ball nut (4) and sector shaft (6) in their positions. The
torsion bar (2) alone is twisted to produce a gap between
the input shaft (1) and sleeve (3) and to activate the
valve. By so doing, the cylinder's chamber "a" comes
under high pressure and the ball nut (4) is moved to the
right. Finally the sector shaft (6) gets turned to turn the
machine to the left.
W1013318
â– Right Turn
The operating principle is the same as with the left
turn. For the right turn, however, the gap between the
input shaft (1) and sleeve (3) is in the direction opposite
to that of left turn. By so doing, the cylinder's chamber
"b" comes under high pressure and the ball nut (4) is
moved to the left. Finally the sector shaft (6) gets turned
to turn the machine to the right.
W1013440
(1) Input Shaft
(2) Torsion Bar
(3) Sleeve
(4) Ball Nut
(5) Main Shaft
(6) Sector Shaft
(7) Gear Box
a : Chamber
b : Chamber
P : Pump Port
(1) Input Shaft
(2) Torsion Bar
(3) Sleeve
(4) Ball Nut
(5) Main Shaft
(6) Sector Shaft
(7) Gear Box
(1) Input Shaft
(2) Torsion Bar
(3) Sleeve
(4) Ball Nut
(5) Main Shaft
(6) Sector Shaft
(7) Gear Box
Tractor Manuals Scotland - Please Do Not Copy