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Remove root cutter from manhole by hand, lifting with the hose. Remove debris from root cutter and
blade. Clean debris from manhole. If entrance into manhole is required, observe NIOSHA safety
rules. After cleaning of debris from first run, root cutter can be reinserted into line and following outline
as above, continue procedure until complete pipe is clean.
When job is complete, retrieve root cutter as outlined. Remove root cutter from hose. If root cutter will
not be used within a 6 hour period, remove cutter blade and with special grease coupler (supplied)
attached to grease gun, pump a light weight grease into the orifice grease fitting. Motor shaft will be
turned by the grease as this is done. When grease can be seen at hose connection, greasing is
complete and root cutter can be stored. In freezing conditions, keep root cutter motor unit warm or
service with grease immediately. As grease may become thick in extreme cold, and if warming is not
possible, service root cutter motor with S.A.E. #10 motor oil. This is done in the following manner.
Place “T” wrench provided on motor shaft, orient root cutter motor so shaft is pointing down, pour oil
into hose connection at jet nozzle a little at a time while turning motor shaft in a clockwise direction as
viewed from hose connection end. When oil is forced out of orifice grease fitting, oiling is complete.
O’Brien Root Cutter Operation
