Transmission
9803/7130 Issue 1
Syncro Shuttle Gearbox -
Power Take Off
The drive for the compressor or transfer gearbox is
transmitted by constant mesh from gear A through
idler gear B onto the power take off clutch gear C.
Gear A is mounted on the input shaft D and is
driven via the torque converter. The converter has
an additional integral splined spigot when
compared to a 'standard' converter, this additional
spline is used to directly drive gear assembly A via
splines E.
The constant meshing gears will freely rotate until
the PTO clutch solenoid F is energised. When the
solenoid is energised, pressurised oil is diverted via
a solenoid spool G to the power take off clutch
pack assembly H, engaging the clutch. Drive is
transmitted to the PTO drive yoke K.
When the solenoid F is de-energised, the clutch is
disengaged and the constant meshing gears will
once again freely rotate (with no drive being
transmitted). At the same time pressurised oil is
diverted via the solenoid spool G to the back of
piston L, applying the PTO brake. This prevents the
yoke and its drive shaft rotating as soon as the
operator disengages the PTO.
For more details of how the PTO clutch and brake
systems work, see Syncro Shuttle Gearbox -
Hydraulic and Electrical Operation
Component Identification
Key
A Drive Gear
B Idler Gear
C Clutch Gear
D Input Shaft
E Drive Gear Splines
F Solenoid Valve
G Solenoid Spool
H PTO Clutch
K PTO Drive Yoke
L PTO Brake Piston
3 - 4
3 - 4
Basic Operation
Section F
Section F
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