TrimmerPlus BR720, Operator'S Manual

Page: 8 / 32

8
MAINTENANCE
WARNING:
To prevent serious injury, never perform
maintenance or repairs while the unit is running. Always
allow the unit to cool before servicing or repairing the unit.
For gas-powered units, disconnect the spark plug wire to
prevent the unit from starting accidentally. For electric-
powered units, disconnect the unit from the power source
to prevent the unit from starting accidentally.
NOTE: Some maintenance procedures may require special tools or
skills. If you are unsure about these procedures, take the unit to
an authorized service dealer.
REPLACING THE BRUSH HUBS AND SKID SHOE
Both brush hubs and the skid shoe should be replaced at the same
time, as they will wear evenly through normal use.
Removing the Old Brush Hubs
1. Make sure the unit is off.
2. Tip the unit back so that it rests upon the shaft grip.
NOTE: To aid the removal process, it may be necessary to wash dirt
off the brush hubs and related hardware.
3. While holding a brush bolt in place with a 1/2 inch wrench, use
another 1/2 inch wrench to loosen the corresponding brush nut
(Fig. 5).
4. Remove the brush bolt and brush nut. Slide the brush hub off
the output shaft (Fig. 6).
5. Repeat steps 3 and 4 for the opposite side.
Removing the Old Skid Shoe
1. Use a 3/8 inch wrench to remove the two skid shoe nuts.
Remove the skid shoe from the gear box (Fig. 7).
Installing the New Skid Shoe
1. Clean the gear box and output shafts.
2. Place the new skid shoe onto the two mounting screws on the
gear box (Fig. 7).
3. Place the two skid shoe nuts onto the mounting screws. Use a
3/8 inch wrench to tighten the skid shoe nuts securely (Fig. 7).
Installing the New Brush Hubs
1. Apply a light machine oil to the output shafts.
2. Slide a new brush hub onto an output shaft (Fig. 6).
3. Rotate the brush hub to align the hole in the brush hub with the
hole in the output shaft (Fig. 6).
4. Insert a brush bolt through the aligned holes. Place a brush nut
onto the brush bolt (Fig. 6).
5. While holding the brush bolt in place with a 1/2 inch wrench, use
another 1/2 inch wrench to tighten the corresponding brush nut
securely (Fig. 5).
6. Repeat steps 2 through 5 for the opposite side.
WARNING:
To prevent serious personal injury, always
wear heavy gloves when handling the brushes.
Fig. 5
Brush Hub
Brush Bolt
Fig. 6
Brush Nut
Brush Hub
Output Shaft
Brush Bolt
Fig. 7
Gear Box
Skid Shoe
Skid Shoe
Nuts (2)
Brush Nut
Mounting
Screws (2)