March 2010
March 6, 2009
Maintenance & Tips
•
Grease Daily:
Four or five pumps of quality grease from a hand pump grease gun, which meet the
NLGI GC/LB requirements to
each bearing’s
grease nipple once a day minimum.
•
Cutting Knives
are to be inspected
daily
for sharpness, excessive wear or bending (If used while
bent, damage to the bolts, pucks and discs may occur). DAVCO® knives can be sharpened, or
turned over.
DO NOT
straighten bent cutting knives.
•
Pucks
are to be inspected periodically and with every knife change for excessive wear. Rotate the
pucks
1/3 of a turn
with each new knife and replaced if necessary.
For maximum Puck life put a
coating of assembly grease around the outside of the puck.
•
Knife bolts
to be inspected with every knife change for excessive wear or bending. Bolts have to
be changed if any damage is found. Torque the knife bolts to
250 ft/lbs
. for Course thread or 300
ft lbs for fine thread bolts.
Re-torque the knife bolts after the first 8 hours of use, and as
required thereafter.
•
Stover nuts
to be inspected and changed with every third knife change because they may lose
their self-locking ability
(When using Course thread bolts).
•
Discs
need to be inspected at regular intervals. After excessive use cracks may appear, if this is the
case the disc assemblies must be changed.
•
Housing Bearings:
With the disc rotating at a low RPM, listen for rumbling or grinding sounds in
the housing, which could be a sign of possible bearing failure.
•
Spindle Nut
(item #3, on Fig. 7-1) torque must not exceed
200 in/lb
. Excessive preload on
bearings will cause premature failure. Check pre-load every 200hrs.
•
Maintain a constant RPM on the DAVCO® Brush Cutter, using the travel speed of the carrier to
determine the thoroughness of the cut. The slower that the carrier travels, the more complete the
cut that the DAVCO® Brush Cutter will make, and the finer the mulch.
