SERVICE ROUTINE MAINTENANCE&
CAUTION - maintenance and repairs
must be carried out by authorised
personnel only. To prevent injury, always
remove the power cable from the power
supply before undertaking any work on
the machine. Do not operate this
machine unless it is fully assembled and
all guards are in place. Use Hiretech
genuine spare parts only.
General
1. Always make a list when first examining the
machine, to remind you of parts or action
needed on completion of repair/service.
2. The 7-2 is subject to high speeds. All screwsHT
should be fitted using a suitable thread lock
compound.
3. On completion of any work or service on an
electrical tool or appliance statutory safety tests
must be carried out by a competent person and
recorded (see Testing for Electrical Safety page 7
and 8).
4. The 7-2 needs no lubrication during routineHT
servicing.
5. Always ensure that the electrical supply is
disconnected before starting any routine
servicing or repair.
Visual Inspection
1. To clean the machine and remove dust, use a
vacuum cleaner to avoid damage and prevent
inhalation of dust.
2. Examine all guards and mechanical parts for
condition including the Disc Guard Ref.54 which
should be undamaged and moving freely.
3. Examine the sanding pad, a worn or damaged
pad must be replaced to maintain performance
and to avoid injury. There must be a minimum of
4mm ( / “) ‘tread depth’.
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4. Examine the power cable for damage. If the
outer insulation shows the slightest of abrasions
or the inner conductors are exposed then the
cable must be replaced. The cable must not be
repaired with tape or insulation sleeve.
5. Ensure all labels are sound, readable and
secure.
6. Check that the castors are sound and moving
freely. If a castor is found to be loose or damaged
then the ‘cutting’ angle must be checked and
reset as necessary (see Setting Castors page 9).
Replace damaged castors.
7. Check the condition of the Bolt-Clamp Ref.59
and clean the threads.
8. Check that the Wrench Ref.61 is in place and in
good condition.
9. If a cloth type bag is in service check the
condition, clogged dust bags or bags with holes
make for inefficient dust pickup.
Dust Control
1. Turn the sander upside down and rest the
machine on the handles. Check the dust skirt for
pieces of abrasive disc and build up of dust.
Clean as needed.
Drive
1. The dive gear does not require maintenance
under normal operating conditions.
Lubrication
1. The 7-2 features sealed for life bearings whichHT
do not require any lubrication. In the unlikely
event that a bearing has to be replaced use a
Hiretech genuine spare part only as the grease
contained in the bearings is special. A standard
bearing is not suitable and may result in further
damage.
2. Should the gearbox require service the gear
housing and gears must be cleaned thoroughly
and the gearbox refilled with grease Part No.
011270. This is a special grease designed for
the high speed and temperatures generated
within the gear box. Under no circumastnce
must a standard automotive grease be used.
Using such a grease will result in gear failure and
damage to the motor and other components.
The grease may also melt and leak from the gear
box staining the floor or work piece being
sanded.
Care of Motor
1. The motor must be kept clean and free from
grease and dust.
2. The motor brushes must be checked regularly.
As it is necessary to remove the Cover Motor
Ref.4 during routine electrical testing, it is then a
simple matter to check the condition of the motor
brushes and avoid costly breakdowns.
3. Replace motor brushes when any oneALL FOUR
brush has worn to 12mm ( / ”) or less in length.
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Brushes slide freely in the brush holders.MUST
There is no need to remove or disconnect any
internal leads when changing the brushes, only
the small braided shunt (pigtail) is disconnected
to release the brush.
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