Allied 9620, Operator And Parts Manual

11

Assembly Instructions - continued
7.  Mounting blower on tractor:

a.  The pins supplied with the snowblower are for a category 2 quick hitch. The quick 
coupling hitch has two holes both at the top of the hitch and at each lift arm. When using a 
quick coupler, the pins must be in the inside set of holes. Use the outside set of holes with a 
standard three-point hitch. 

b.  Using tape or a bright colored marking pen, mark on the outer shields the position where 
the shaft is completely pushed together and the position where you have a 4"overlap. Watch 
these marks when moving the blower through all possible operating angles to see that the PTO 
shaft stays within this range. 

c.  With the engine on the tractor shut off, attach the PTO shaft. The tractor end has a standard 
6-spline end with a spring loaded locking collar. The snowblower end has a clamp-style yoke 
with a 3/8" key way. Slide the yoke onto the gearbox shaft with the 3/8" key supplied. Lock the 
yoke in place with the 1/2" x 3" hex bolt and lock nut fitted through the groove in the gearbox 
shaft. After tightening the bolt, insert and tighten the 3/8" socket set screw supplied. 
   CAUTION: Always check to see that both ends of the PTO shaft are securely attached every 
time the Snowblower is used. This should always be done with the tractor engine off. 

d.  Check that the PTO shaft does not bottom or separate with the blower in the extreme high 
and low positions. A longer optional PTO shaft is available if the standard shaft is too short. 
Check for free movement of all parts in various raised positions; particularly the PTO shaft. 

e.  NOTE: Excessive U-joint wear and shear pin failure may result if the tractor PTO angle 
exceeds 20. The drawing below gives an approximate way to check this angle. With the PTO 
half extended, the tractor output should not be over 32 inches high. Use 34 inches if the PTO is 
nearly fully extended and 30 inches if it is nearly compressed.

Assembly Instructions - 9620 Snowblower