HireTech HT8 System manual

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Version 2.3 Model HT8 1.2 MS © Hiretech Part # 024800-0
OWNERS MANUAL & OPERATING INSTRUCTIONS
HT8 MULTI-SPEED DRUM FLOOR SANDER
From Serial Number
08184 (240/240 Volt) & 04804 (110/120 Volt)

WARNING
For safe operation of this machine, read and understand all
instructions. Look for the ‘warning/caution’ symbol.
This symbol means that if you do not follow the instructions
injury can occur to the operator and damage to the
machine and floor may result.
WARNING: Risk of explosion.
Floor sanding can result in an explosive mixture of fine
dust and air. Use this floor-sanding machine only in a well-
ventilated area free from any flame, match or source of
ignition.
WARNING: Risk of fire.
Never leave the floor sander unattended with dust in the
dust bag.
WARNING: Risk of potential injury.
Moving Parts - to reduce the risk of injury, unplug the
machine before replacing abrasive sheets or carrying out
any form of adjustment or servicing.
NORTH AMERICAN SAFETY INSTRUCTIONS
WARNING: This floor sanding machine must be grounded.
This floor-sanding machine shall be grounded while in use to protect
the operator from electric shock. The machine is provided with a
three-conductor cord and a moulded three-contact grounding
type attachment plug to fit the proper grounding type receptacle.
The Green (or Green and Yellow) conductor in the cord is the
grounding wire. Never connect this wire to any pin other than the
grounding pin of the attachment plug.
This floor-sanding machine is provided with an attachment plug
as shown in sketch A. It is intended for use on a nominal 120 volt
circuit. If a properly grounded receptacle as shown in sketch A
is not available, an adaptor as shown in sketch ‘C’ should be
installed as shown in sketch B if the outlet box that houses the
receptacle is grounded. Be sure to fasten the grounding tab with a
metal faceplate screw.
MAINS CABLE WIRING - PLUG
USE & APPLICATION
This machine is intended for commercial use connected with the
laying and maintaining of wooden floors and decks.
These types of surfaces may be found both in commercial and
household environments.
SPARE PARTS
Use Hiretech genuine spare parts only for service and repair.
Use of non-approved parts will void the product warranty. See
the back cover of this manual for the terms and conditions of the
Hiretech Limited Warranty.
Hiretech reserves the right to make changes or improvements to it’s
products without prior notice.
For the latest product news and updates, spare parts, downloads
and service information visit www.hiretech.biz.
ATTACHMENT PLUG SKETCH ‘C’
METAL
SCREW
COVER OF GROUNDED
OUTLET BOX SKETCH ‘B’
ADAPTER
GROUNDING
MEANS
COVER OF GROUNDED
OUTLET BOX SKETCH ‘A’
GROUNDING PIN
CONTENTS
WARNING 1
NORTH AMERICAN SAFETY INSTRUCTIONS 1
MAINS CABLE WIRING - PLUG 1
USE & APPLICATION 1
SPARE PARTS 1
SPECIFICATION 2
SAFETY 2
SET UP 2
PREPARATION 3
OPERATION 3
FLOOR SANDING TECHNIQUE 4
FLOOR TYPES 4
FLOOR SANDING TECNIQUE 5
FLOOR SANDER ABRASIVE GUIDE 6
FLOOR SANDER ABRASIVES 6
SERVICE & ROUTINE MAINTENANCE 7
FAULT FINDING 12
PARTS DIAGRAM 13
PARTS DIAGRAM 14
PARTS LIST 15
CIRCUIT DIAGRAM 16
MULTI-SPEED CABLE ROUTING 16
1 © Hiretech

SPECIFICATION
The Hiretech HT8 Multi-Speed Drum Floor Sander will sand hard
and soft wood floors, cork and composition floors that require
rapid sanding and levelling to a fine finish. A powerful motor drives
a finely balanced sanding drum which is covered in a unique drum
rubber providing a high quality finish to both hard and soft woods
and other surfaces. Completely self contained with a high efficiency
dust pickup the HT8 breaks down into three simple component
parts for easy transport. Multi-Speed control with the choice of four
operating speeds, no volt start and overload protection. The HT8
is a high performance floor sander suitable for professional and
homeowner use
Power Supply 110/120 V 50/60 Hz
220/240 V 50/60 Hz
Off Load Current 110/120 V 8A
220/250 V 5A
Average Load Current 110/120 V 15A
220/250 V 8A
Noise 95 dBa at 1metre (3’ 3”)
Vibration 1.60 m/s² r.m.s.
Switch Electronic On/Off switch and
mutli-speed control with no volt
start protection and overload
protection.
Motor Continuous heavy duty AC/
DC self cooling 4 brush.
Motor RPM 8,500
Drum RPM 3,300
Sanding Drum 8” (203mm) wide aluminium
extrusion with moulded rubber
drum cover.
Drive Non-slip toothed timing belts
and gear cut pulleys.
Dust Pickup Seated oversize vacuum fan
with adjustable dust pan,
disposable paper dust or cloth
bag.
Moving Parts Sealed for life ball bearings.
Guards High impact injection moulded
ABS.
Abrasive 495mm (19.5”) total length x
203mm (8”) wide sheet with
notched and angled ends 24
to 120 grit.
Power Cable 7m (23’) Non-marking outer
insulation.
Weight Net 41.5kg (91.5lbs)
Shipping Weight 50.0kg (110.3lbs)
Shipping Dimensions 78 x 40 x 44cm
(30.75” x 15.75” x 17.5”)
Warranty 2 years
Read the following Safety and Operational notes before
using your Hiretech Floor Sander.
SAFETY
1. For safety it is recommended that a residual current circuit
breaker (ground fault interrupter) is used with this machine.
2. Check the operating voltage is correct, the voltage is detailed
on the serial plate on the top of the body of the floor sander.
3. Always completely assemble the floor sander and connect
the handle cable to the body of the floor sander before
connecting to the power supply.
4. Always disconnect from the power supply when changing the
abrasive paper, servicing the floor sander, replacing the dust
bag or leaving the machine unattended.
5. Always replace the dust bag (paper type) or empty the dust
bag (cloth type) when the dust in the bag reaches the ‘MAX’
line or when the machine is left unattended.
6. Never dispose of or empty the contents of the dust bag into a
fire or incinerator.
7. Never reuse the paper dust bag or use a non standard bag.
Cloth bags must be in good condition with no holes.
8. Always wear a dust mask when using the floor sander,
handling the dust bag or cleaning the machine after use.
9. Wear ear protection when using the floor sander.
10. Ensure adequate ventilation of the work area to avoid the
formation of a combustible mixture of flying dust and air.
11. Never smoke when using or servicing the floor sander or
when handling the dust bag.
12. Never expose the machine to rain or damp. Always store in a
dry place.
13. Stop the floor sander immediately if damage to the machine
or abrasive paper is suspected.
14. Never allow the power cable to come into contact with the
sanding drum when the floor sander is in operation. If the
power cable becomes damaged and the inner conductors are
exposed switch the power OFF and remove the plug before
attempting to move the machine. The cable must be replaced
by an authorised dealer or qualified electrician using Hiretech
genuine spare parts only.
15. Keep hands, feet and loose clothing away from all moving
parts of the machine.
16. Punch down or remove all nails, screws, tacks and other
fixings from the floor before sanding to prevent contact with
the sanding drum.
17. Never operate the machine without all the guards in place.
18. Keep children and pets clear at all times.
19. If the machine should fail to operate refer to the Fault Finding
Guide on page 12.
20. The HT8 is heavy, take care when lifting and transporting the
machine. Always break down the machine into its component
parts when lifting and transporting.
SET UP
Assembly and Transport
To help with the following instructions please refer to the parts
drawing on page 13 and 14 to identify the component reference
(Ref) numbers.
1. The HT8 breaks down into three component parts, the main
body, handle assembly and dust tube for easy handling and
transport. To assemble loosen the Clamp Bracket Ref.21 and
slide the handle assembly into the Handle Bracket Ref.51.
2© Hiretech

Adjust the height of the handle so that your arms are slightly
bent when standing upright behind the machine. This will
provide you with maximum control in operation. Tighten the
clamp bracket firmly. Always ensure that the clamp bracket is
tight, check periodically during use.
2. Connect the Cable Handle Ref.20 to the Body Twist Lock
Ref.24 at the rear right hand side of the floor sander body.
Align the plug with the pins, push in and twist clockwise to
lock.
3. Slide the Exhaust Tube Ref.59 into the Exhaust Bracket Ref.56
and push fully home.
4. Fit a paper dust bag following the instructions printed on the
bag. If a cloth bag is used ensure that it is tied securely around
the dust tube neck and that the bag is in good condition with
no holes.
5. To prepare the floor sander for use place the machine on the
floor and remove the main cable from it’s storage position
on the handle assembly. Check that the cable is in good
condition and that all fittings are secure.
6. To dismantle the floor sander reverse procedure 1 to 5 above.
7. Always ensure that the floor sander is secure and cannot
move when being transported in a vehicle. The floor sander
is heavy. Take care when lifting and carrying the machine.
Always break down the machine into its component parts
when lifting and transporting.
Installing Abrasive Paper
1. Ensure the power cable is disconnected from the power
supply.
2. Tip the floor sander back so that it rests on the handle.
3. Lift the Drum Guard Ref.35 and turn the Drum Ref.168 to
expose the Paper Clamp Bar Ref.175. Take care not to trap
your fingers when turning the drum.
4. Loosen the 2 Paper Clamp Screws Ref.174 with a coin or
suitable screw driver so that the clamp bar raises about 12mm
(1/2“) only. DO NOT remove the screws completely.
5. Select a suitable grade of abrasive paper (see Abrasive Paper
Guide on page 6). To help install course grit abrasive papers
draw the smooth side (back) of the paper over the edge of a
work bench to make it curl .
6. Kneeling in front of the machine place one end of the abrasive
paper under the clamp bar so that the notches align with the
clamp bar screws and clamp bar.
Carefully holding the abrasive paper in place rotate the drum
1 revolution. Tuck the other end of the abrasive paper under
the clamp bar and use both hands to squeeze the sheet tight
around the drum. Make sure it is square to the edges of the
drum with no overlap and both ends of the abrasive sheet are
equal distance under the paper clamp bar.
Firmly tighten the two clamp bar screws. Check the abrasive
sheet is skin tight around the drum. If in doubt repeat the
above procedure. Loose or damaged abrasive sheets will
tear during sanding and can be expensive to keep replacing.
Damage may also occur to the floor and floor sander.
7. Lower the drum guard and stand the machine up. The floor
sander is now ready for use.
Note:
Use Hiretech genuine floor sander abrasives for the best
sanding performance and finish. They will also reduce the
risk of tearing due to poor fit which is a common problem with
generic and non standard abrasives.
PREPARATION
1. Where possible remove all furniture from the area or room.
The HT8 Drum Floor Sander features an efficient dust pickup,
however, some dust will remain on the floor. You can minimise
the amount of uncollected dust by using Hiretech disposable
paper dust bags and replacing when full.
2. Remove all tacks, staples and other unwanted fixings from the
floor. Failure to do so will result in damage to the abrasive
paper and sanding drum.
3. Punch all nails below the surface of the floor using a suitable
nail punch and hammer. Any screws used to fix boards should
be counter sunk below the surface. During sanding any nails
or screws that become exposed must be punched or counter
sunk further.
4. Firmly fix all loose boards or blocks.
5. Remove heavy wax, grease and dirt deposits by hand.
6. Sweep and vacuum the floor thoroughly to remove
dirt and discarded fixings.
7. Ensure good ventilation by opening windows.
OPERATION
1. Move the floor sander to the location of your work.
2. Connect the power cable to a suitable power supply ideally
located behind or to one side of the machine and work area.
3. Wear a dust mask and ear protection.
4. Stand close to the back of the floor sander and hold both
handles with the main cable held in a small loop in the left
hand and then pass the cable over the left shoulder.
5. Apply light downwards pressure on the handles to tip the floor
sander back to raise the sanding drum off the floor.
6. To switch on lightly press and hold the ON/OFF button (I/O)
until the motor starts (approximately 1.5secs) then release the
button.
To switch off lightly press the ON/OFF button (I/O) and the
HT8 will switch OFF.
Select one of the four operating speeds by pressing one of the
four buttons marked 1, 2, 3 or 4. 1 is the slowest speed, 4 is
the fastest speed. See the Multi-Speed Abrasive and Speed
Application Chart on page 6 for recommend speeds and
applications.
The user may pre-select the operating speed before
switching ON.
If the HT8 is switched ON and the motor is running always
raise the drum off the floor before selecting or changing the
speed.
When the HT8 is disconnected from the power supply the
Multi-Speed control will reset to speed position 1 when it is
next connected to the power supply.
CAUTION: the HT8 is a powerful machine. Always
ensure that you have a firm grip before switching on.
6. Now walk slowly forward and at the same time release the
pressure on the handles to gently lower the HT8 so that the
sanding drum comes into contact with the floor.
7. Guide the floor sander in a straight line at a slow walking
pace. Do not force or hold the floor sander back. Allow the
machine to do the work and always move at an even pace.
8. At the end of the pass while still moving forward tilt the floor
sander back so that the sanding drum comes clear of the
floor. Now walking backwards lower the floor sander again
3© Hiretech

and pull it backwards over the area just sanded moving at a
steadily even pace. Take care to ensure that the power cable
is kept clear of the sanding drum at all times. At the end of the
sanding pass and while still moving backwards tilt the floor
sander back so once again the sanding drum comes clear of
the floor.
Move the machine over so that it overlaps the area just sanded
by approximately 50mm (2”) and start to sand the next pass
repeating the above technique.
Keep your body/legs close to handle as this will provide
better control and make it easier to smoothly raise and lower
the drum. If you operate the HT8 with your arms stretched out
in front, you will have less control of the floor sander.
CAUTION: to prevent damage to the floor surface, work
piece or machine follow these rules.
i. Always ensure that the floor sander is moving when in
operation and the sanding drum is in contact with the
floor.
ii. Never lift the back of the machine when sanding.
iii. Never apply pressure to try to increase the rate of
sanding. Damage to the floor and machine will occur.
iv. Never bounce or drop the floor sander on to the floor.
Always lower the machine gently.
v. Never dwell in one place, move steadily at all times.
vi. Never allow the power cable to come into contact with
the sanding drum.
9. When the dust in the dust bag reaches the ‘MAX’ line stop
sanding. Disconnect the power cable from the power supply
and remove the paper dust bag. Turn the top of the paper
dust bag over to stop the escape of dust and dispose of into a
suitable container. Never reuse the paper dust bag or empty
it or dispose of it into a fire. If a cloth bag is used empty into
a suitable container being careful to contain the dust. Do not
dispose of the contents into a fire.
10. Fit a new paper dust bag or refit the cloth bag. Reconnect the
floor sander to the power supply and continue sanding.
11. When taking a break from work disconnect the power cable
from the supply, remove and dispose of the paper dust bag, or
empty the cloth bag as detailed in 8. above. Never leave the
floor sander unattended with the dust bag in place containing
dust.
12. On completion disconnect the power cable from the supply.
Remove and dispose of the paper dust bag, or empty the
cloth bag as detailed in 8. above. Stow the cable on the
handle assembly and if required dismantle for transportation.
Carry out maintenance as recommended in Maintenance and
Servicing.
DANGER: never leave the floor sander unattended with
dust in the dust bag. Always remove the dust bag and
dispose of into a suitable container.
FLOOR SANDING TECHNIQUE
HT8 Drum Floor Sander - a powerful floor sander designed for the
rapid levelling and sanding of all types of wood flooring excluding
thin laminated or veneered floors. Load the sander with abrasive
making sure that it is skin tight around the drum. Loose sheets
will tear. Place the sander on the right hand wall (unless you are
making an angled cut on uneven floors) with about two thirds of
the floor in front of you. Start the sander with the drum off the floor
then walk forward at an even pace and ease the drum on to the
floor. As you near the end of the pass, gradually raise the drum
off the floor. Practice this technique before turning on the sander.
Cover the same path you made on the forward cut by pulling the
machine backwards and easing the drum to the floor as you begin
the backward pass until you reach the original starting point, then
ease the drum off the floor.
When two thirds of the floor is sanded, turn the floor sander around
and sand the remaining third in the same way. Overlap the one
third area by 0.6 to 0.9 meters (2 to 3 feet ) with the two thirds
area to blend the two areas together.
WARNING: never bounce the sanding drum or dwell in
one place as this will sand dips and hollows in the floor.
HT7 Disc Floor Sander (Edger) - a powerful disc floor sander
designed for sanding along the edges of a floor without damaging
the baseboards or mouldings. Also suitable for smaller areas
where the HT8-1.2 Floor Sander will not reach like stair treads and
closets load the abrasive disc making sure the retaining bolt is tight.
Start the edger with the disc off the floor then lower the disc to
the floor as you move the sander. Work progressively moving the
sander in a sweeping motion from side to side.
HTF Orbital Floor Sander - a orbital action floor sander designed
for re-finishing, sanding between coats of varnish and re-surfacing
floors in good condition. Load the abrasive sheet, pad or strip.
Start the sander, move immediately and sand in the direction of
the grain using the same technique as the drum floor sander. For
difficult to reach areas use the disc floor sander with a fine grit
abrasive, or sand by hand.
Hand Sanding - to sand difficult to reach areas scrape and sand
the floor by hand. Use a scraper to remove old finishes, always
scraping in the direction of the grain, and then sand by hand using
the same grit abrasive as you finished with when machine sanding.
See Floor Sanding Technique diagrams on page 5.
FLOOR TYPES
Plank & Strip Floors
Old floors in good condition - when the floor is in good condition
- no uneven edges, cupping or crowning of planks and strips - and
you want to re-surface the floor, sanding back to new wood, start
sanding in the direction of the planks or strips - with the wood grain.
Start with a medium grit abrasive. Complete the first cut with the
HT8-1.2 Floor Sander then sand up to the baseboards and door
thresholds with the HT7-2 Disc Floor Sander, using a medium grit
abrasive, blending the edges in with the main floor area. Sweep
the floor. Using a medium/fine grit abrasive, sand the main floor
area with the drum sander and then complete the floor with the
edger using a fine grit abrasive. Sweep the floor. Finish sanding
the main floor area with the drum floor sander using a fine grit
abrasive. If the floor is in particularly good condition (level with no
deep scratches or blemishes) you may re-surface the floor using the
HTF-2 Floor Sander, however, as the sanding action of this machine
is less aggressive than the HT81.2 Floor Sander the job will take
more time.
Uneven floors - when the floor is uneven sand diagonally at 45o
across the room in both directions using the HT8-1.2 Floor Sander
with a coarse grit abrasive. Only make one cut on both diagonals,
this will achieve a basic level. Now complete the floor as for a
level strip or plank floor. Use the same grit abrasive as was used
on the 45o cut for the first cut parallel to the planks or strips.
4© Hiretech

Floors with an existing finish - when re-finishing a floor remove as
little of the existing surface as possible. If the old finish is worn and
the floor is generally in good condition use the HTF-2 Floor Sander
with Hiretech abrasive pads and strips which have been especially
designed for re-finishing floors. These will maintain the integrity of
any stain used to colour the wood and prepare the surface for a
new coat of finish. If the floor is badly marked and scratched and
has to be sanded back to new wood use the HT8-1.2 Floor Sander
and HT7-2 Disc Floor Sander. Always try a medium grit paper first,
particularly on a diagonal cut. If 90% of the old finish is removed
and the floor is generally level, you do not need to use a coarse
grit abrasive.
Engineered and Thin Floors
Use the HTF-2 Floor Sander for engineered or thinner floors that
may have been subjected to repeated sanding. The HTF-2 will
remove old surface finishes and prepare the floor for re-finishing.
Sand the floor using the same method as a strip, plank, or parquet
floor. If the floor has deeper scratches or marks these should be
sanded out by hand and blended in with the main floor. To check
the wood depth in the floor remove a baseboard or moulding from
around the edge of the floor. This should provide access to the
edge of the floor for inspection.
FLOOR SANDING TECNIQUE
5
Parquet & Block Floors
The grain of the wood will run in a number of directions so sand
the floor in the direction of the main source of natural light in the
room. If there is no source of natural light sand in the direction of
the longest side of the room or, if the room is square, in the direction
the furniture is laid out and how people normally use and view the
room.
This technique will help mask any imperfections in the floor.
Complete the sanding operation as detailed for plank or strip
floors.
Between Coats of Finish (varnish)
Use the HTF-2 Floor Sander to sand between coats of floor finish,
particularly when using water based varnishes. These types of
finishes tend to raise the wood grain when first applied to raw
wood. Allow each coat of varnish to dry completely following
the manufactures directions. Use Hiretech abrasive pads to sand
between each coat of varnish. The fine abrasive pads will remove
light brush/applicator marks and raised grain while maintaining
the integrity of the coat of varnish applied.
© Hiretech

FLOOR SANDER ABRASIVE GUIDE
DO NOT OVER-SAND USE ONLY AS HEAVY GRADE ABRASIVE AS IT TAKES TO DO THE JOB. PROGRESS
FROM FIRST GRADE USED THROUGH FOLLOWING GRADES TO REMOVE ALL VISIBLE SANDING MARKS.
DO NOT MISS A GRADE.
FLOOR SANDER ABRASIVES
Hiretech Abrasives
HT8/DU8
FLOOR SANDER
SHEET
20 & 50/CASE
HT8 EX
FLOOR SANDER
BELTS
5/CASE
HT7/SUPER 7
EDGER DISC
FIBRE BACKED
25/CASE
HT7/SUPER 7
EDGER DISC
PAPER BACKED
25 & 50/CASE
HTF FLOOR
SANDER SHEET
ADHESIVE
BACKED
HTF ABASRIVE
PAD
20/CASE
Hiretech recommend
the following abrasive
range which are suitable
for all floor types and
P16 - - 01025 - - -
P24 Grit Open Coat 01001 - - 01044 - -
P24 Grit 01002 01010 01026 - - -
P36 Grit -01011 ----
P40 Grit 01003 01012 - 01045 01750 -
P50 Grit -01013 01027 - - -
P60 Grit -01014 - - 01751 -
P80 Grit 01004 01015 01028 01046 01752 -
P100 Grit -01016 ----
P120 Grit 01005 01017 01030 01048 01754 -
P150 Grit -01018 ----
P180 Grit - - - - 01756 -
P280 Grit/Backing Pad - - - - - 01769
Abrasive Grade Floor Type and Condition
Grit P24 Open Coat
(Very Coarse non-glogging)
For removing surface coatings from old floors such as varnish, stains and wax
polishes. For the rapid sanding and removal of scratches and marks. Sanding
level the joints of sub-flooring like particle board and masonite.
Grit P24
(Very Coarse)
For the rapid sanding and removal of scratches and marks. Sanding level the
joints of sub-flooring like particle board and masonite.
Grit P36 to P50
(Coarse/Medium)
For removing surface coatings from old floors such as varnish, stains and wax
polishes. For the rapid sanding and removal of scratches and light marks.
Sanding level the joints of sub-flooring like particle board and masonite.
Grit P60 to P80
(Medium)
For the rapid sanding and removal of scratches and light marks. Sanding level
the joints of sub-flooring like particle board and masonite.
Grit P100 to P120
(Medium/Fine)
Intermediate sanding of all types of wood floor. For final sanding of all types
of wood floor.
Grit P150 - P180
(Fine/Very Fine)
For final sanding of all types of wood floor. First sanding of cork or
composition floors. For sanding between coats of solvent based and 2 pack
varnishes.
6© Hiretech

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.
HT8 Multi-Speed Service Indicator Light
1. To help assist in scheduling routine servicing and maintenance
the HT8 Multi-Speed has a run time clock built into the Multi-
Speed Control Unit. The run time clock records the time the
HT8 motor runs and stores the total run time in memory even
when the HT8 is disconnected from the power supply.
Two run time intervals of 100hrs or 300hrs can be set by the
operator. When the run time interval set is reached the ‘green’
power connected light flashes 4 times when the HT8 is first
connected to the power supply. The light will then remain ON
to indicate that power is connected (see illustration below).
The run time can not be reset until the interval set (100hrs
or 300hrs) has been reached. The green power connected
light will only flash when the power is first connected and the
set number of run time hours has been reached. At all other
times the green power connected light will come ON without
flashing when the power supply is connected.
From new the run time clock is set to indicate 300hrs of run
time. When this pre-set time is reached the green power
connected light will flash when the power is connected.
HT8 Multi-Speed Switch
On completion of any service work the run time clock maybe
reset to 300hrs or 100hrs at the owners/operators discretion.
It is recommend that if the HT8 is owner operated that the run
time is reset to 100hrs after the initial 300hr run time until new
motor brushes are fitted. When new motor brushes are fitted
it is recommended the run time is reset to 300hrs.
If the HT8 is part of a hire or rental fleet it is recommend that
the run time is reset to 100hrs at all times to provide for more
regular servicing as demanded by the hire and rental market.
CAUTION: the run time indicator is provided as a
reminder to the operator/workshop that the HT8 requires a
‘full’ service paying particular attention to the service areas
detailed on the fallowing pages. Routine maintenance
should be carried out on a regular basis with special
attention paid to guards, cables and general mechanical
components.
Note: When a new Multi-Speed Handle Assembly or new Multi-
Speed Control unit is fitted carry out a full service including
replacing all four motor brushes. This service will then match the
initial 300hrs service interval as set from the factory.
2. To reset the run time clock to 300hrs connect the HT8 to
the power supply. DO NOT start the HT8. With the power
connected and the green power connected light ON, press
and hold Speed Buttons 2,3 and 4 together for a minimum of
3 seconds. Speed Button 3 light will flash to indicate that the
run time clock has been reset to 300hrs.
Release the Speed Buttons, button 1 will now be ON (yellow
light). Disconnect from the power supply, then reconnect to
check that the green power connected light does not flash
when connecting to the power supply to confirm the reset has
been successful.
3. To reset the run time clock to 100hrs connect the HT8 to
the power supply. DO NOT start the HT8. With the power
connected and the green power connected light ON, press
and hold Speed Buttons 1, 2 and 4 together for a minimum of
3 seconds. Speed Button 1 light will flash to indicate that the
run time clock has been reset to 100hrs.
Release the Speed Buttons, button 1 will now be ON (yellow
light). Disconnect from the power supply, then reconnect to
check that the green power connected light does not flash
when connecting to the power supply to confirm the reset has
been successful.
Note: all four Speed Button lights will turn OFF when a run time
reset is started.
4. The run time clock is built into the Speed Control unit and will
record the time the HT8 runs. If the handle assembly is used
on another HT8 it will record the time that unit runs for. It is
recommended that the handle assembly is kept with the same
HT8 at all times to accurately record the run time for that HT8.
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 HT8 is subject to high speeds. All screws should be re-
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 needs no lubrication during routine servicing.
5. Always ensure that the electrical supply is disconnected
before starting any routine servicing or repair.
Visual Inspection
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.
7© Hiretech

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. Note that the Hiretech genuine spare part
has a non-marking insulation so that the cable does not mark
the floor during use.
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
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 to remove the
fan belt. Repeat for the Drum Belt Ref.164.
CAUTION: take care to avoid trapping your fingers when
removing or replacing the drive belts.
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.
Dust Control System
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, check for 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 straight before refitting.
Install the dust shoe ensuring that the clearance between the
shoe and the drum is maintained at10mm ( 3/8“).
Lubrication
1. The HT8 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.
Sanding Drum
1. Check that power supply is disconnected. Tilt the machine
back and rest the handle on the floor. Open the drum guard
and examine the drum cover. A damaged or worn cover must
be replaced to maintain machine performance. A damaged
or worn cover can result in poor sanding with subsequent
damage to the floor surface and can be dangerous in
operation. A cover that is worn to 1/4“ (6mm) or less in
thickness must be replaced.
2. To replace the drum cover see the detailed instructions
included in each genuine Hiretech Drum Cover Kit Ref.167
Part # 162312. The use of an impact screwdriver may assist.
3. It is recommended that at each service interval the drum cover
is checked and trimmed (dressed) if necessary to provide a
true uniform diameter.
4. First check that the rear castors are properly adjusted. Remove
the 4 Screws Ref.83 and the Belt Guard Ref.81. Check that
the factory mark is present and aligned on the rear castor
adjuster Ref.64 and main frame. Adjust as necessary by
loosening the two clamp Bolts Ref.65 and adjusting the cam.
If the machine has no factory mark on the adjuster and main
frame then it is a later type machine that uses a concentric
support instead of an adjuster. No adjustment is required.
Note: On earlier models the line stamped on the adjuster and
main frame has been set in the factory at the time of manufacture.
Never change, deface or alter this line.
5. Fit a sheet of fine grit abrasive paper (120 grit), abrasive side
up on to a level floor surface. Remove any abrasive paper
from the drum and re-tighten the clamp bar screws. Make sure
the clamp bar screws are tight.
Position the floor sander over the abrasive paper and connect
the power cable to the power supply. Tip the floor sander
back to raise the sanding drum off the floor and switch on.
Gently lower the floor sander so the sanding drum ‘just’
touches the abrasive paper. Hold the sander in position for a
few seconds then tip back and switch off.
Disconnect the power cable and tip the floor sander back so
that it rests on it’s handle. Lift the drum guard and check the
condition of the drum cover. If it is uniform an even surface
will be witnessed, if not, continue to dress the drum until all
high and low spots are removed. Take care not to remove too
much material as this will reduce the life of the drum cover.
6. When a uniform surface is achieved it is advisable to slightly
‘feather’ both edges of the drum cover. Switch off and
disconnect the power cable from the power supply. Tilt the
machine back and lift the drum guard to expose the drum
cover. Using a medium to fine grit abrasive paper carefully
feather the edge of both sides of the drum cover by holding
the abrasive paper against the edge and rotating the drum.
Be careful not to trap your fingers. The softer edge provided
will help prevent ‘cut’ lines witnessed on the floor surface
when sanding particularly in softer woods. Always feather
the edges of a new drum cover.
WARNING: the sanding drum and drum cover must
be correctly adjusted and maintained to ensure the best
sanding performance. Failure to do so can result in damage
to the floor surface and can be dangerous.
Care of Motor
1. The motor must be kept free from grease and dust. DO NOT
use high pressure air to blow the motor clean. Use a vacuum
and soft brush to clean the motor and brush block assembly.
2. The motor brushes must be checked regularly, inspect the
brushes every three months or every 300 hours from new and
then every 100 hours of use thereafter.
The HT8 Multi-Speed has a run time clock built into the Multi-
Speed Control Unit to assist in scheduled servicing. See page
8 for information.
8© Hiretech

3. Replace ALL FOUR motor brushes when any one brush has
worn to 12mm (1/2”) or less in length. Brushes MUST slide
freely in the brush holders.
4. To inspect and replace motor Brushes Ref.104, with the brush
block assembly removed.
i. Remove the three Screws Ref.82 and remove the Wall
End Guard Ref.84 to expose the motor brush assembly.
ii. Remove the four retaining Screws Ref.31 from the Shield
Wall End Ref.30, insert two of the screws into the ‘jacking
holes’ situated adjacent to the countersunk retaining
holes.
iii. Carefully tighten these screws until the shield wall end is
jacked clear of the outer casting. Withdraw the shield-
wall end.
iv. With the brush block assembly complete and the
connecting leads still attached. You will note that as the
brush block assembly is withdrawn the brushes spring
towards the centre and often the brush springs fall clear
as the brushes are no longer at a height to retain them.
Take care not to lose any springs.
v. To remove a brush spring with a brush in the operating
position push the brush spring down and towards the
brush and lift out.
vi. Using a cross recess screwdriver remove the four brush
shunt (pigtail) retaining Screws Ref.105 and lock Washers
Ref.100.
vii. Remove the four brushes. Remove the two ‘jacking’
screws.
viii. Thoroughly clean the brush assembly and housing using
a soft brush and a suitable vacuum cleaner.
ix. Inspect the four brushes for damage or wear and if any
one brush is found to be damaged or worn to a length
of 12mm (1/2”) or less in length then replace all four
brushes.
Motor Brush
x. When replacing brushes ensure free movement in each
brush holder and fit the brush with the shunt (pigtail)
towards the field coil. Ensure that each brush shunt is
connected securely with the screw, and lock washer, two
spare screws and lock washers are provided with each
pack of brushes. Do not fit the brush springs at this stage.
xi. Pull each brush up to the top of the holder using the shunt
wire to retain it in this position for the next stage.
xii. Enter the assembly into the main frame taking care to
avoid contact between the brushes and the commutator of
the armature, that the shield wall end is correctly aligned
with the main frame and that no leads are trapped. There
is a depressed pattern on the shield wall end and on the
main frame to assist alignment. Both the bearing fit and
the main frame fit are ‘light contact’ and may require
Minimum Brush Length
12mm ( /” )
1
2
lightly tapping into position using a soft mallet. DO NOT
FORCE.
xiii. Replace and tighten the four countersunk Screws Ref.31.
xiv. Remove the four brush block retaining Screws Ref.31 and
the single timing Screw Ref.34 from the Shield-Wall End
Ref.30. The brush block assembly is now free to rotate.
To fit the brush springs rotate the brush block assembly
counter clockwise (over towards the rear of the machine)
until the lower brush holder is accessible, fit the brush
spring by inserting into the holder with the coil spring over
the brush then push down until the tag comes into contact
with the holder, slide the tag away from the brush and
release. The brush spring will clip into position. Check
the spring and brush for correct alignment and free
movement.
xv. Rotate the brush block assembly clockwise and repeat
to fit the remaining three springs. The switch and field
cables restrict the movement of the brush block assembly,
take care not to loosen or damage these cables.
xvi. Return the brush block assembly to its original position
and align the timing notch in the block with the timing
hole, screw the timing Screw Ref.34 into position.
xvii. Secure the brush block assembly using the remaining four
screws Ref.34. DO NOT OVER TIGHTEN.
xviii. Finally check that all cables are well clear of moving parts
before refitting the guard wall and securing with the 3
Screws Ref.82.
Note: To inspect and replace the motor brushes while retaining the
brush block assembly in place repeat the procedure xiv. to xviii.
above.
Multi-Speed Control Unit (Switch)
CAUTION: there are no serviceable components in the
HT8 Multi-Speed Control Unit. Under no circumstances
must any parts be serviced or tampered with. If the unit fails
to operate contact your local reseller. Replacement parts
must be fitted by a qualified electrician.
Fitting a new Switch Multi-Speed (Ref.7)
1. To replace the Switch Multi-Speed Ref.7 remove the four
Screws Ref.86 from the Switch Housing Ref.11. Carefully lift
the Switch Housing clear of the Handle Tube Ref16. Take
care to avoid damage to the rubber ‘O’ ring Gasket Switch
Housing Ref.10.
The Switch Multi-Speed Ref.7 is connect to the Controller Multi
Speed Ref.9 via a ribbon cable. Take care not to stretch or
pull this cable.
2. Carefully disconnect the ribbon cable from the Controller
Switch Multi-Speed Ref.9 by pushing the two end clips
outwards.
3. Remove the six Screws Ref.8 from the Switch Multi-Speed and
remove the component from the Switch Housing.
4. Place the new Switch Multi Speed in the Switch Housing and
secure using the six Screws Ref.8. Do not over tighten the
screws.
5. It is recommended that a new Gasket Switch Housing Ref.10
is fitted. Carefully place the Gasket in the rebate on the back
of the Switch Housing.
9© Hiretech

6. Reconnect the ribbon cable to the Controller Multi-Speed.
Ensure that the connection is free of dust, carefully align the
ribbon cable plug and push down until the two end clips lock
into position.
7. Place the Switch Housing on the Handle Tube taking care
not to trap the ribbon cable or dislodge the Gasket Switch
Housing.
8. Replace the four Screws Ref.86.
9. Carry out electrical and function tests (see page 13 Electrical
Testing).
Fitting a new Controller Multi-Speed (Ref.8)
Note: Refer to the Circuit Diagram on page 19.
1. To replace the Controller Multi-Speed Ref.9 remove the four
Screws Ref.86 from the Cover Switch Ref.11. Carefully lift
the Cover Switch clear of the Tube Handle Ref.16. Take care
to avoid damage to the rubber ‘O’ ring Gasket Ref.10 The
Switch Multi-Speed Ref.7 is connected to the Controller Multi-
Speed via a ribbon cable. Take care not to stretch or pull on
this cable.
2. Carefully disconnect the ribbon cable from the Controller
Ref.9 by pushing outwards on the two end clips positioned
each side of the ribbon cable socket. Place the Cover Switch
Assembly to one side.
3. Disconnect the Cable Main Ref.39 and remove it together
with the Strain Relief Ref. 5 Release the Cable Handle Strain
Relief Ref.18 and remove the Earth (Ground) Terminal from
the Cable Handle termination at the top of the Tube Handle
Ref.16).
4. Remove the 6 Screws and Washers Ref.12 from the back of
the Tube Handle to release the Controller Ref.9 You will note
that the controller appears to be ‘stuck’ into position, this is
due to the ‘Heat Sink Compound used to ensure good thermal
contact between the two components. Carefully lever the
two components apart taking care not to damage the Tube
Handle Ref.16.
5. Disconnect the Cable Handle to Motor Output Terminals and
remove the controller.
6. Thoroughly clean the inside of the Tube Handle Ref.16
ensuring the all traces of the old Heat Sink Compound are
removed.
7. Carefully apply a thin layer of Heat Sink Compound Ref.13
to the back of the new Controller. Take care to ensure only a
very thin layer is applied evenly over the entire rear surface,
do not over apply.
8. Connect the Cable Handle to Motor Output Terminals and
position the two AC cables alongside the controller so that
they will be available for connection later. (see diagram on
page 19).
9. Carefully place the new controller into position taking care to
line up the 6 mounting holes with the holes in the Tube Handle,
secure it into position with the 6 Screws and Washers Ref.12.
10. Carefully following the Diagrams reconnect the Cable Main
and the Earth (Ground) Terminal from the Cable Handle,
taking care to correctly fit the two Strain Relief’s Refs. 5 and
18 to ensure that the cables are properly secured.
11. Examine the Cover Switch Assembly, if the ‘O’ ring Gasket
Ref.10 is damaged in any way replace it by carefully placing
the new gasket into position in the groove provided on the
underside of the Cover Switch Ref.11 You may find that using
a little adhesive such as ‘super glue’ will help hold the gasket
into position during re-assembly.
10
12. Reconnect the Switch ribbon cable to the controller by pushing
it into position and noting that the two clips positioned at each
side of the socket lock inwards securing the ribbon cable plug.
13. Place the Cover Switch Assembly onto the Tube Handle and
line up the four mounting holes, taking care to avoid trapping
any leads or dislodging the Gasket. Secure it into position with
the 4 screws Ref.86
14. Carry out electrical and function tests (see Electrical Testing on
page 13).
Electrical Testing
CAUTION: testing for electrical safety should be
undertaken by a competent person and all results recorded.
Do not exceed 1250 volt insulation test duration of 3
seconds.
1. Examine the power cable and handle cable for damage, if
the outer insulation shows more than the slightest of abrasions
or the inner conductors are exposed then the cable must
be replaced. The cables must not be repaired with tape or
insulation sleeve.
2. Open and check mains plug and interconnecting socket
Ref.24 for condition, loose connections, damaged wires etc.
Ensure that the strain relief of the power cable plug is correctly
secured to the outer cable insulation.
3. Open and examine the Switch Housing Ref.11 for loose
connections, damaged wires, and general condition. Pay
special attention to any gaskets, ‘O’ rings and seals intended
to exclude dust from the switch and switch housing area, these
must be maintained in good condition. Examine the soft key
pad that is located in the switch cover, ensure this is in good
condition and the surface is not punctured or damaged.
4. Ensure that the Strain Relief Ref.5 is correctly secured to the
outer cable insulation.
5. For the HT8 fitted with a Multi-Speed Control and HT8’s fitted
with a low volt circuit breaker type switch use a trailing test
cable (see part information below) that connects the testing
equipment directly to the machine body Base Twist Lock Ref.23
This allows the body of the HT8 to be tested separately from
the handle assembly.
Part No. 024500 Test Lead
(use for all regions excluding Australia and North America)
Part No. 024501 Test Lead
(use for Australia)
Part No.:024502 Test Lead (NA)
(use for North America only)
CAUTION: the HT8 Test Lead does not have the LIVE
(HOT) conductor connected. Only the NEUTRAL and
EARTH are connected at the plug end and the NEUTRAL
AND EARTH connected at the Body Twist Lock end.
There is also a shunt fitted in the body twist lock to short
the LIVE and NEUTRAL terminals to allow a full dielectric
test. THIS TRAILING TEST LEAD CANNOT BE USED FOR
FUNCTIONAL TESTING.
6. Replace the switch cover taking care to avoid trapping leads
and ensuring that the dust gasket is correctly positioned.
7. Place the handle assembly on the test bench then using
standard procedure test for electrical safety (CLASS 1
EARTHED APPLIANCE)
© Hiretech

DO NOT EXCEED 1250 VOLT FLASH DURATION 3
SECONDS.
RECORD THE TEST RESULTS.
8. Now Place the machine body safely on the test bench and
connect the Test Lead to the Base Twist Lock Ref.23 and
connect the other end to the test equipment. Then using
standard procedure test for electrical safety.(CLASS 1
EARTHED APPLIANCE)
DO NOT EXCEED 1250 VOLT FLASH DURATION 3
SECONDS.
RECORD THE TEST RESULTS.
9. You have now tested both the handle assembly and the
machine body, if both show good test results then you can
carry out a functional or run test if required by placing the
complete machine in a secure position and switching the
machine on.
CAUTION: when undertaking a functional test ensure
that the machine is secure, remember the sanding drum will
rotate, ensure that the drum cannot come into contact with
the work bench/service area.
10. Ensure that the switch trips to ‘OFF’ when the current is
interrupted. During complete machine functional test with the
machine switched on and running. Switch off the electrical
supply at the supply socket then when the machine has stopped
- switch it back on at the socket. Note that the machine has
tripped to OFF and the speed button one (1) is illuminated.
You must now press and hold the ON/OFF (I/O) button for
1.5secs to turn the machine ON. If this function fails to operate
do not use the machine. Report/repair fault and retest.
11 © Hiretech

FAULT FINDING
12 © Hiretech

PARTS DIAGRAM
HT8-1.2 Clamp Bar Multi-Speed
13 © Hiretech

PARTS DIAGRAM
HT8-1.2 Clamp Bar Multi-Speed
14 © Hiretech

PARTS LIST
Ref PSTK Pack Qty Description
001 962308 1 Screw
002 980652 2 Washer
003 162019 1 Clamp Handle
004 163907 1 Handle Cross
005 101205 1 Strain Relief
005 163691 1 Strain Relief (NA)
006 101206 1 Nut Lock
007 024520 1 Switch Multi-Speed
008 024615 6 Screw
009 024525 1 Controller Switch Multi-Speed 240V
009 024530 1 Controller Switch Multi-Speed 110V
010 163870 1 Gasket Switch Housing
011 024510 1 Cover Switch Multi-Speed
012 024620 6 Screw and Washer Set
013 007633 1 Heat Sink Compound
014 024515 1 Key Pad Switch
015 020300 1 Multi-Speed Conversion Kit HT8/DU8
240V (UK)
015 020305 1 Multi-Speed Conversion Kit HT8/DU8
110V (UK)
015 020310 1 Multi-Speed Conversion Kit HT8/DU8
220V (EUR)
015 020315 1 Multi-Speed Conversion Kit HT8/DU8
240V (AUS)
015 020320 1 Multi-Speed Conversion Kit HT8/DU8
110V (NA)
016 169015 1 Tube Handle Multi-Speed
017 980615 2 Washer
018 101220 1 Strain Relief Handle Cable
018 163804 1 Strain Relief Handle Cable (NA)
019 164508 1 Hook Cable
020 024560 1 Cable Handle Multi-Speed
020 024575 1 Cable Handle Multi-Speed 110V (UK)
020 024580 1 Cable Handle Multi-Speed (NA)
021 960180 1 Clamp Handle Bracket
022 960183 1 Bracket Handle Cross
023 911045 1 Base Twist Lock
024 911046 1 Body Twist Lock
025 163867 1 Lead Earth Base Twist Lock
026 163808 1 Grommet
028 165103 1 Label ‘Lift Here & At Rear’ (Metal)
029 163201 1 Main Frame
030 167804 1 Shield Wall End
031 962084 4 Screw
034 962204 5 Screw
035 163795 1 Guard Drum Assembly (Grey)
036 121252 1 Label Guard Drum
039 024535 1 Cable Main Assembly Multi-Speed
240V (UK)
039 024540 1 Cable Main Assembly Multi-Speed
240V (AUS)
039 024545 1 Cable Main Assembly Multi-Speed
220Vt (EEC)
039 024550 1 Cable Main Assembly Multi-Speed
110V (UK)
039 024555 1 Cable Main Assembly Multi-Speed
110V (NA)
043 010200 4 Washer
045 920148 1 Nut
046 024600 1 Buffer Rubber
047 980197 1 Washer
048 024605 1 Bolt
049 030850 2 Nut
050 167308 1 Ring Retaining
051 160815 1 Bracket Handle
052 980196 1 Washer
053 962244 5 Bolt
Ref PSTK Pack Qty Description
054 163796 1 Bag Dust Cloth
055 163826 6 Retainer Dust Bag Disposable
056 160809 1 Bracket Exhaust
057 163403 1 Gasket Exhaust
058 07037 25 Disposable Paper Dust Bag HT8 Pack 2
058 07039 50 Disposable Paper Dust Bag HT8
059 163790 1 Tube Exhaust (Grey)
060 167708 1 Shaft Floor Roller
061 169704 2 Roller Floor Assembly (with bearing)
062 902567 4 Bearing (Fan & Floor Roller)
063 467308 4 Ring Retaining
064 020010 1 Support Floor Roller
065 962139 2 Bolt
066 980646 2 Washer
067 962103 1 Screw
072 167902 1 Shoe Intake
073 163636 1 Cover Inlet
074 167404 1 Rod Drum Guard
075 920256 1 Nut
077 980629 1 Washer
078 169504 1 Weight Balance
079 962409 1 Screw
080 962170 1 Screw
081 163791 1 Guard Belt (Grey)
082 163814 3 Screw
083 163869 4 Screw Guard Belt
084 163792 1 Guard Wall End (Grey)
085 980623 2 Washer
086 962109 8 Screw
087 167312 1 Ring Retaining
088 164202 1 Housing Fan
089 168203 1 Spacer Fan Bearing
091 008212 1 Spacer Fan
092 163004 1 Fan Intake
093 162021 2 Clamp Bearing
094 167608 1 Seal fan
095 167210 1 Retainer Seal
096 010210 4 Screw
097 166906 2 Pulley Fan
098 915028 6 Key
099 167704 1 Shaft Fan
100 010220 4 Screw and Washer Set
101 980648 2 Washer
102 980626 3 Washer Lock
103 920132 3 Nut
104 010180 4 Brush Motor
109 010230 4 Brush Spring
110 911662 1 Lead Motor Assembly
111 167302 1 Ring Retaining
113 168104 1 Sleeve
114 163104 1 Field 110/120V HT8
114 163112 1 Field 220/240V HT8
115 962401 2 Screw
116 166172 1 Baffle Motor
117 167204 1 Retainer Baffle
118 160408 1 Armature 110/120V
118 160412 1 Armature 220/240V
119 980004 2 Spacer
121 163008 1 Fan Motor
123 167802 1 Shield Pulley
124 902550 2 Bearing Drum Shaft
125 163682 2 Bearing Armature
126 062003 2 Clamp Bearing
127 962345 10 Screw
128 168212 1 Spacer Motor Pulley
129 163304 3 Flange Pulley
130 166909 1 Pulley Motor
140 163789 1 Brush Block Assembly
142 962411 1 Screw
15 © Hiretech

Ref PSTK Pack Qty Description
143 162006 1 Clamp Bearing
144 925113 1 Pin Drum Shaft
145 161108 1 Bush Bearing
146 168206 1 Spacer Bearing
149 167716 1 Shaft Drum
152 168209 1 Spacer Bearing
159 166916 1 Pulley Drum
164 903260 1 Belt Drum 3/4” (19mm) Wide
165 903273 1 Belt Fan 1/2” (13mm) Wide
167 162312 1 Drum Cover Kit
168 162532 1 Drum Assembly Complete
169 100327 13 Screw
170 163012 1 Assembly Fan Intake
173 163668 1 Lifting Pin Assembly
174 000920 2 Screw Clamp Bar (screwdriver slot)
Ref PSTK Pack Qty Description
174 163657 2 Screw Clamp Bar (coin slot)
175 020045 1 Clamp Bar Paper (reversible)
176 164607 3 Insert Drum Kit
179 024800 1 Owners Manual & Operating Instructions
200 101219 1 Floor Roller Assembly
201 163827 1 Kit Moulded Guards (Grey)
201 163873 1 Kit Moulded Guards (Grey, excl. Tube
Exhaust)
Following parts not illustrated
250 024500 1 Test Lead
250 024502 1 Test Lead (NA)
250 011860 2 Service Tool - Extractor Seal
250 100325 1 Service Tool - Clamp Drum Cover
250 163822 1 Service Tool - Drum Insert Removal
250 163857 1 Service Tool - Adjuster Floor Roller
250 163865 1 Service Loot - Locking Drum
CIRCUIT DIAGRAM
HT8-1.2 Floor Sander Multi-Speed
16
MULTI-SPEED CABLE ROUTING
© Hiretech

HIRETECH LIMITED WARRANTY Hiretech warrants to the original purchaser that the Hiretech machine covered by this warranty is free from defects in workmanship and materials. Should any part fail in the period of two years from the date of the original purchase as a result of a defect, Hiretech will (at it’s option) either repair or replace the part without charge provided that the machine has been operated in accordance with the Owners Manual and Operating Instructions. Should any such defect arise, please contact your nearest authorised repair agent. Standard service over land mainland freight costs will be refunded on warranty repairs at the sole discretion of Hiretech or the authorised repair agent. If the repair is non-warranty, the customer will be advised before any work is undertaken. This warranty is the sole warranty by Hiretech and is in lieu of all other warranties express or implied and releases Hiretech from all other obligations and liabilities. This warranty does not apply to normal wear and tear to the machine, and in particular does not cover normal wear parts such as mains cable, wheels, switches, relays, brushes, rubber parts, hoses and bearings. This warranty also does not cover, and Hiretech will not be liable for, excessive wear caused by abnormal use. Hiretech will under no circumstances be liable for alterations to the machine or for damage caused by third persons, or for misuse or abuse of the machine, or damage caused during transportation. Repairs of the machine made or attempted by persons other than those specifically authorised by Hiretech shall render this warranty void and Hiretech will not be liable for such repairs, the cost of such repairs, or the consequences of such repairs. Where spare parts are used on the machine and they do not conform to Hiretech specifications, this warranty will be rendered void and Hiretech will not be liable. Hiretech will not be liable for any indirect or consequential loss, damage, cost or expense of any kind whatever and however caused whether arising under contract, tort (including negligence) or otherwise including (without limitation) loss of production, loss of profits or contracts or of operating time or goodwill or anticipated savings.
Every effort has been made to present all information in this publication accurately, however no liability is accepted for any inclusions or advice given or for omissions from this publication. Hiretech reserves the right to make changes or improvements to its products without prior notice. Hiretech®is a registered trademark of Hire Technicians Group Ltd., all other trademarks are the property of their respective owners. © Hire Technicians Group Ltd.
MANUFACTURED BY
HIRE TECHNICIANS GROUP LIMITED
UNITED KINGDOM
TEL: [phone] FAX: [phone]
E-mail: [email protected] Web: www.hiretech.biz
© Hiretech
DECLARATION OF CONFORMITY
Manufacturer's Name: Hire Technicians Group Ltd. Manufacturer's Address: Manufactured by Hiretech in the United Kingdom. See www.hiretech.biz for contact information and address.
declares that the product:
Product Name: Hiretech Floor Sander Model Name: HT8-1.2 230 Volt 50Hz Insulation Class 1 HT8-1.2 110 Volt 50Hz Insulation Class 1
conforms to the following:
Machinery Directive (Harmonised) 2006/42/EC Low Voltage Directive (Harmonised) 2014/35/EU Electromagnetic Compatibility Directive 2014/30/EU/EU Restriction of Hazardous Substances in Electrical and Electronic Equipment (RoHS) 2011/65/EU
harmonised standards applied:
EN 60335-1:2012+A15:2021 EN 61000-3-2:2019+A1:2021 EN 61000-3-3:2023 EN 55014-2:2015 EN 55014-1:2021 EN 63000:2016+AMD1:2022
electrical safety test procedures comply with:
EN 60335-1, CSA C22.2 Where the product is licensed to carry a National Approval Mark it is certified that all such products comply with the terms of that license. K. Mellor, Director 1 May 2023