Brush Bandit 1290XP, Operating & Parts Manual

Page: 92 / 140

Bandit
Copyright 12/07 PAGE 70
MODELS 1290XP/1590
If anvil is not too worn, the two
working edges can be ground or
machined to repair.
NOTE: Make sure the anvil clearance will still be obtainable
after grinding or machining.
CHIPPER SECTION
CHIPPER SECTION
TROUBLE SHOOTING CHIPPER PROBLEMS
Knives should be replaced in sets. These sets
are determined by the amount of resharpening
done to the knives. It should be reinstalled with
another knife of comparable usage. It helps
to keep the disc/drum balanced, and it helps
maintain chip quality.
NEVER allow these knives to wear beyond
absolute specified minimum distance from the
center line of bolt.
3) Discharge Plugs or Does Not Throw Chips
Properly.
A. Lugging engine on large material - keep
engine RPM up.
B. Knives are dull or worn to minimum size.
C. Obstruction in discharge chute.
Patches welded into the chute can cause
obstruction of chip flow. Anything causing
an obstruction will cause the chute to plug.
D. Chipping rotting material that has little
substance can also plug the discharge chute.
E. Worn fan blades.
4) Chipper Bearings Running Too Hot.
A. Improper lubrication - purge bearings once
a day with EP-2 Lithium type grease.
B. Chipper drum operating at too high RPM’s.
DO NOT exceed recommended RPM’s.
C. Bearings worn out (REPLACE).
D. Bearing locknut is loose.
1) Chipper Makes Poor Quality Chips or Does
Not Feed Properly.
A. Knives have lost their edge. File, grind or
replace knives.
DO NOT operate the Bandit
with dull knives.
B. Knife anvil worn or needs adjustment.
Rotate, repair or replace (see below).
C. Feedwheel(s) are not operating correctly.
(SEE HYDRAULIC TROUBLE SHOOTING).
D. The throat/base opening is a high-wear
area. The feed plate anvil takes much
of this wear but other areas wear as
well. Attention must be paid to any areas
where outer, noncutting edges of chipper
knife are exposed. These areas must be
built up with weld to maintain the original
integrity.
E. Knives are at the wrong angle. Knives must
be ground at a 30° to 30 1/2° angle.
F. Feedwheel teeth worn (REPLACE).
G. Material being chipped is very small, dry
or rotting. This type of material does not
produce good chip quality.
2) Chipper Knife Hits Anvil.
A. Check the anvil clearance at both sides
of the knife by using a feeler gauge, the
clearance should be approximately
.120” (3.0 mm) from the highest knife.
B. Check the chipper bearing bolts for
tightness (SEE TORQUE CHART).
5/8” x 5 1/2” x 10” (15.9 mm x 139.7 mm x 254mm)
Chipper Knife - Models 1290XP, 1590
2 /8” 2 /8”
(60. mm) (60. mm)
Min. Min.