Multiquip HBC25B - Manual (Page 11)

HBC19B/HBC25B REBAR CUTTER • OPERATION AND PARTS MANUAL — REV. #1 (03/07/12) — PAGE 11
REPLACING CARBON BRUSHES
When the carbon becomes less than 5 or 6 mm (1/4 inch)
the motor force deteriorates because of low rectification
(Figure 4). The carbon brushes need to be replaced at this
time. It is also recommended that the brushes be replaced
after 200 hours of use.
WARNING
Unplug unit from power source before replacing carbon
brushes.
DANGER
During operation of this rebar cutter, there
exists the possibility of
electrocution,
electrical shock or burn, which can
cause
severe bodily harm or even
DEATH!
To avoid these hazards:
NEVER use damaged or worn cables
when plugging the rebar cutter into
an AC power receptacle.
NEVER grab or touch a live power
cord with wet hands.
NEVER stand in water and touch a live power cord.
1. Make sure that the power plug is not connected to the
power source.
2. For the HBC19B, remove the 2 bolts holding the cover
using a 4mm allen-head wrench then remove the cover
to access the two carbon brush caps (one on each
side). See Figure 5.
3. Remove the carbon brush cap of the motor outer frame
using a standard screwdriver. See Figures 5 and 6.
4. Replace the carbon brushes with new ones (two for
the HBC19B and one for the HBC25B).
5. Put back the cap after brush is installed.
6. For the HBC19B, replace cover and tighten 2 bolts.
2. The cutter rod will retract and return to its starting
position.
3. Once the cutter rod returns to its starting position,
tighten the return valve before resuming rebar cutting.
RETURN VALVE
Figure 3. Return Valve
Figure 4. Carbon Brush Size
5-6 MM
(1/4 INCH)
Figure 5. Replacing Carbon Brushes (HBC19B)
Figure 6. Replacing Carbon Brushes (HBC25B)
CARBON BRUSH CAP
OPERATION
REMOVE 2 BOLTS
TO REMOVE COVER
USE STANDARD
SCREWDRIVER
TO REMOVE CAP
CARBON
BRUSH
POWER
CORD
(POWER ON)
WET
H ANDS