Sabre 1338 Gear, Техническое руководство

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HYDROSTATIC POWER TRAIN
THEORY OF OPERATION
6 - 18
2/12/97
Theory of Operation — K51
L.H. Side
R.H. Side
A
E
C
D
C
B
F
G
O
P
Q
D
F
G
H
I
E
J
K
L
M
N
When the brake pedal (A) is depressed, the frame rod
(B) and frame rod arms (C) rotate forward. This motion
causes the brake rod (D) and neutral return strap (E),
to move forward at the same time. As the brake pedal
is depressed further, spring strap (F) compresses the
compression spring (G). The compression spring pulls
the brake rod (D) forward.
On the left hand side of the tractor, the brake lever (H)
rotates forward forcing (by means of a cam) the brake
shaft (I) into the transmission where it is pushed
against the internal brake disk. As the brake pedal is
depressed further, more-and-more force is applied until
the disc stops turning. This works in conjunction with
the neutral return linkage, stopping the tractor.
On the right hand side of the tractor, the neutral return
strap (E) is pulled forward, forcing the cam roller (J) to
roll up one of the ramp contours of shifter bracket (K).
This action moves the shifter bracket and shifter lever
(L) back towards the neutral position. At the same time,
this returns the shift linkage (M) into neutral position
and the internal, variable pump swashplate into its level
(non-pumping) position. This works in conjunction with
the brake linkage, stopping the tractor. As-soon-as the
shift lever reaches either of the radii of the neutral slot,
the return spring (N) snaps the shift lever back into
neutral position.
When the brake pedal is fully depressed, the brake can
be locked into park position with the park lever (O) and
locking rod (P). The locking spring (Q) holds the
locking rod in place until the operator eases up on the
pedal and the force of compression spring (G) locks
the frame rod arm (C) against the locking rod (D). To
release the park brake, the operator must again
depress the brake pedal fully and pull the park lever
and locking rod (P) into the disengaged position.
Brake Pedal Travel
NOTE: Brake pedal has approximately 127 mm (5 in.)
of travel.
W
X
Y
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