Alamo BUSH HOG RMB 1660 Operator's Manual page 113

When the PTO shaft is in position attach torque chains to convenient locations to prevent rotation of the shaft
guarding.
Fit the machine control unit in the tractor cab in a convenient location that allows for safe and easy operation of
all the controls and functions.
PTO DRIVESHAFT INSTALLATION
The PTO driveshaft attaches between the tractor and the
machine gearbox to transfer the power required to the run
and operate the machine – it is important to achieve the
correct shaft length to avoid risk of it 'bottoming out' when
raising or lowering the machine. The procedure for
measuring and cutting the shaft is as follows:
Measuring the PTO Shaft
With the machine attached to the tractor in the working
position measure the horizontal distance 'A' from the
tractor's PTO to the input shaft on the machines gearbox
and subtract 75mm (3") – this figure is the required shaft
length.
Place the fully closed PTO shaft on the ground and
measure its overall length, if the shaft is shorter than the
required length you can use it without the need to shorten -
providing it allows for a minimum 150mm (6") overlap when
fitted.
If the shaft is longer subtract the required shaft length plus
an additional 75mm (3") - the resulting figure is the excess
length that will need to be removed from each half of the
shaft.
Cutting the PTO Shaft
Separate the two halves and using the measurement
obtained above shorten both the plastic guarding and the
inner steel profile tubes of each shaft by this same amount.
De-burr the cut tubes with a file to remove rough or sharp
edges and thoroughly clean to remove swarf before
greasing, assembling and fitting the shaft.
NOTE: For subsequent use with different tractors the shaft should be measured again to check suitability there
must be a minimum shaft overlap of 150mm (6").
Maintenance
To increase the working life of the PTO shaft it should be periodically checked, cleaned and lubricated – refer
to the PTO maintenance section for further details on this subject.
RMB 1660 01/22
© 2022 Alamo Group Inc.
ASSEMBLY
Assembly Section 3-13