Finn BarkBlower BB-1208 MS, Parts And Operator'S Manual

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E) Tighten the nine bolts on the three knife-clamps and replace the set-screw plugs in the
access holes.
7. If a knife is worn past adjustment and needs to be replaced, follow the procedure below:
A) Remove the nine bolts that hold the three knife clamps in place and remove the clamps
and knife.
B) Clean the knife shelf so that it is free of debris and smooth.
C) Compare the replacement knife to the one removed. If the new knife is wider, back out
the adjusting screws by at least that amount. Count the turns and back the screws out
evenly.
D) Lay the knife down on the knife shelf. Ensure the knife is installed with the cutting
angle edge facing down as shown in Figure 4. Loosely install the three knife clamps
with the nine knife mounting bolts. Tighten the mounting bolts just enough to hold the
knife in position while still allowing it to be moved.
E) Check the clearance between the knife and the rotor end walls, and along the rotor vane
using a feeler gauge. There should be a .003 in. to .006 in (.08 mm to .15 mm.) gap.
F) If necessary, use the jacking screws to close the gap. One full turn of the screw moves
the knife 0.055 in. (1.4 mm).
Figure 4
G) Tighten mounting bolts.
H) Immediately have the removed knife sharpened. Do not attempt to grind the knife by
hand. It must be ground straight and true on a surface grinder by an experienced knife
sharpener. Have the knife sharpener grind the knife to the profile shown in Figure 4:.
NOTICE
When dimension A has been reduced to 1-3/8 in. (3.5 cm), the knife must be discarded.
FLOOR CHAIN ADJUSTMENT: EVERY 50 HOURS
1. The floor chain tension should be checked every 50 hours. If the chain is too loose, the
chain flights can buckle under the floor pan and damage the chain linkages and flights. If
the chain is too tight, it can put added wear on the floor bearings and cause excessive chain
stretch. The chain originally contains 164 links. Over time as the chain stretches, some links
may need to be removed in order to tighten the chain. When the chain has been shortened
to 156 links, the entire chain must be replaced.
2. Shut the machine off and open the rear access door above the airlock. Remove any build-
up under the floor pan between the chain links and the rear catch pan so an accurate mea-
surement can be made. Check the tension on the floor chain in the Bark Blower as shown
in Figure. 5 below:
40°
37°
A
1/4