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 the floor
sander unless it is fully assembled and all
guards are in place. Use Hiretech
genuine spare parts only.
General
Visual Inspection
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 HT8-1.2 is subject to high speeds. All screws
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
8).
4.
The HT8-1.2 needs no lubrication during routine
servicing.
5.
Always ensure that the electrical supply is
disconnected before starting any routine
servicing or repair.
1.
Check that the drum guard Ref.35 is in good
condition and functioning correctly. Ensure that
the Warning Label Ref.36 is present and legible.
2.
Check all other guards and mechanical parts are
in good condition.
3.
Examine the power cable Ref.39 and the handle
cable Ref.20. 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
4.
Examine both the mains plug and the
interconnecting socket, Body Twist Lock Ref.24.
The plugs must be opened and examined (see
Electrical Testing page 8).
5.
If a cloth type bag is in service check the
condition, old clogged cloth dust bags make for
an inefficient dust pickup.
6.
Ensure that all labels are present and in good
condition.
Drive Belts
Dust Control System
Lubrication
Care of Motor
1.
To examine the condition of the Drive Belts
Ref.164 and Ref.165 remove the four screws
Ref.83 and the Belt Guard Ref.81.
2.
Lift the Fan Belt Ref.165 while rotating the pulley
remove the fan belt. Repeat for the Drum Belt
Ref.164.
3.
Examine the pulleys for wear, worn or damaged
pulleys should be replaced
4.
To reduce the instance of belt breakage, examine
the drive belts, look for cracks or fraying and
replace if necessary with new belts. To replace
reverse the above procedure taking care to avoid
bending the belts tighter than the pulley diameter
as this can result in damaged belts. Refit the belt
guard.
1.
For efficient dust pick up ensure that cloth type
dust bags are clean and unclogged and that the
intake is clear and properly adjusted.
2.
Turn the machine on to its side and loosen the
three Screws Ref.71 and remove the Dust Shoe
Ref.72 and clear any obstruction. The grit from
the abrasive paper can wear away the leading
edge of the dust shoe, if this has occurred then
file or grind the leading edge level before
refitting.
Install the dust shoe ensuring that the clearance
between the shoe and the drum is maintained at
3/8“ (10mm).
1.
The HT8-1.2 is completely lubricated.
The
bearings are sealed and do not require
lubrication. In the unlikely event that a bearing
requires replacement use a Hiretech genuine
spare part only as the grease contained in these
bearings is special. A standard bearing is not
suitable and may result in further damage.
1.
The motor must be kept free from grease and
dust.
2.
The motor brushes must be checked regularly,
inspect the brushes every three months or every
500 hours of use, whichever comes first.
3.
Replace ALL FOUR motor brushes when any one
brush has worn to 12mm ( / ”) or less in length.
Brushes MUST slide freely in the brush holders.
CAUTION - take care to avoid trapping
your fingers when removing or replacing
the drive belts.
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