Maintenance Procedures continued…
BLADE INSTALLATION PROCEDURES FOR DD16
1.
Make sure that the shaft and keyway are clean and
smooth before installing the blade.
2.
Insert the cap screws through the clearance holes
in the bushing and place loosely into the hub of
the blade. Do not press the bushing in. Hand start
3.
Insert the cap screws, turning them just enough to
engage the threads in the tapped holes on the hub.
The bushing should be loose in the hub. Insert the
key into the keyway (
Figure 4.9
). Tighten two
bolts drawing the bushing and hub together.
4.
Slide the blade onto the bushing/hub assembly
and insert the three screws through the blade and
turn evenly but do not tighten. Make sure blade is
in line with hub then tighten screws
(Fig. 4.10)
.
Locate the blade and bushing so that the blade tips
do not hit the rear grill eyelets. On some models
the blade and bushing may be in beyond or out
away from the end of the shaft up to ¼” but no
further. This is necessary for proper blade
clearance.
Figure 4.9
5.
Tighten the cap screws progressively with a
wrench. Tighten each cap screw partial turns
successively until both are tight. Final tightening
should be done with torque wrench with the
torque set at 7.5 ft./lbs. for each screw. Over
tightening will cause the cap screws to break or
crack the blade. (
Figure 4.10
)
Figure 4.10
Maintenance
5.9
