Yanmar YM276 Service Manual page 621

BRAKES
260-1 5-1
HOW THE BRAKES WORK
A
-
Brake Cwer
B -
Bralra Lever
C
-
Operating Cam
D
-
Anchor Pin
E -Brake Dlvm
F - B r a e Shoe
The brakes are internal expansion mechanical. Foot
pressure expands the brake shoes
(F)
against the brake
drums
(E)
t o slow or stop the tractor. Each brake as-
sembly is sealed t o prevent water from entering the as-
sembly.
The brake drums
(El
are splined t o individual pinionshafts
(H)
which are in mesh with the final drive gear. Brake
shoes (F) are the leadingtrailing type. The same amount
of braking force i s produced for both forward and reverse
motion. The parking brake consists of a locking device
, - - .
coupled t o the foot pedal.
G
-
Return Springs
H
-
Final Pinion
Shaft
The left and right brakes operate independently of each
other of can be locked together to allow uniform braking
action. Pressure against the foot pedals is transferred
through the braka rod t o
t h e
brake lever (0). Movement
of the lever causes the brake cam shaft t o rotate, expanding
the brake shoes outward against the brake drum.
As the shoes are pressed against the drums, pinion rotation
is retarded, which in turn stops or slows final drive gear
rotation.
SME27b01718304 YM276and Z76D
Kinomato. Primed in
Japan