Yanmar YM276 Service Manual page 571

POWER
SHIFT TRANSMISSION
250.1 0.1
A
-
Internal Gear Pump D
-
InertiaBrake ti
-
Range Sliding Gears
(Power Shift Purnpl E
-
Power
Shift Clutch Shaft I -Differential
Drive
Shaft
B - M a i n S h h
F
-
ls+Reverre Clutch Pack J
-
Reweme IdleGear
C -Counter Gwrr
G
-
2nd-3rd Clutch Pack K - M a i n Gearr
HOW THE SYSTEM WORKS
The power shift transmission is composed of sliding gear
transmission for range shifting and constantmesh transrnis-
sion with hydraulically operated clutches for power shifting
instead of sliding collars. The power shifting part contains
t w o compound clutch packs controlled four clutches.
Power shifting part permit three forward and one reverse
speeds without foot-clutching in each speed range. Sliding
gear part permit speed ranges. Forward speeds and rear-
ward speeds are obtained by these two components.
/-.
The engine power i s transmitted from main drive shaft
through power shift pump (A) t o main shaft (0). The
power from main gears (K) on main shaft is transmitted t o
the constantmeshed gears on power shift clutch shaft
(El.
The power from power shift clutch shaft i s transmitted t o
counter gears (C), and then down t o differential drive
shaft
(J)
for creep, 1 s t and 2nd speed ranges.
The power from power shift clutch shaft is also transmitted
to directly differential drive shaft for 3rd speed range.
Differential drive shaft (I
I
drive differential ring gear.