Husqvarna PG 280 S Instruction manual

Workshop manual
PG 280 S
English
1022 - 002 -

Contents
1 Introduction
1.1 Document description............................................ 3
1.2 Target group...........................................................3
1.3 Revisions................................................................3
1.4 Safety..................................................................... 3
1.5 Servicing tools........................................................3
2 Safety
2.1 Safety definitions....................................................4
2.2 General safety instructions.....................................4
2.3 Symbols on the product......................................... 4
3 Servicing data
3.1 Symbols in the diagrams........................................5
3.2 Tightening torques ................................................ 6
4 Servicing tools
4.1 Servicing tools overview.........................................7
5 Product overview for repair and servicing
5.1 Component overview PG 280 S.............................8
5.2 Component overview electrical enclosure..............9
5.3 Component view of the motor connection box
PG 280 S 1-phase......................................................10
6 Repair and servicing
6.1 Motor.................................................................... 11
6.2 Grinding head.......................................................12
7 Troubleshooting
7.1 Function tests.......................................................14
7.2 To do a function test of the grinding head............14
7.3 To do a function test of the electrical system....... 14
7.4 To do a function test of the motor........................ 14
7.5 Before you do the troubleshooting....................... 14
7.6 The motor does not start...................................... 15
7.7 The motor stops................................................... 17
8 Diagrams
8.1 Wiring diagram..................................................... 18
9 Technical data
9.1 Electrical specifications ....................................... 19
21022 - 002 -

1 Introduction
1.1 Document description
This manual gives a full description of how to do
maintenance and repair on the product. It also gives
safety instructions that the personnel must obey.
1.2 Target group
This manual is for personnel with a general knowledge
of how to do repair and do servicing. All personnel that
do repair or do servicing on the product must read and
understand the manual.
1.3 Revisions
Changes to the product can cause changes to the
maintenance work and spare parts. Separate
information is sent out for each change.
Read the manual together with all received information
about changes to maintenance and spare parts for the
product.
1.4 Safety
WARNING: All personnel that repair or do
servicing on the product must read and
understand the safety instructions in this
workshop manual.
1.5 Servicing tools
The manual gives information about necessary servicing
tools. Always use original tools from Husqvarna.
1022 - 002 - Introduction - 3

2 Safety
2.1 Safety definitions
Warnings, cautions and notes are used to point out
specially important parts of the manual.
WARNING: Used if there is a risk of injury or
death for the operator or bystanders if the
instructions in the manual are not obeyed.
CAUTION: Used if there is a risk of damage to
the product, other materials or the adjacent area
if the instructions in the manual are not obeyed.
Note: Used to give more information that is necessary in
a given situation.
2.2 General safety instructions
• Read and obey this workshop manual.
• Obey the local safety regulations when you repair or
do servicing of the product.
• The safety equipment you use must obey local
regulations.
• Use only the equipment that the manufacturer
recommends.
• Use personal protective equipment.
• Use protective gloves and safety glasses. The safety
glasses must obey the ANSI Z87.1 for US or EN166
for EU countries.
• Use earmuffs when the product is in operation.
• Always stop the product before you repair or do
servicing of the product.
• Remove flammable materials from the work area.
The product can cause sparks.
• Do not use the product if the power cord or cables
are damaged.
• Disconnect the product from the mains socket.
• If possible, keep the power cord disconnected when
you repair or do servicing of the product.
• Use cables adapted to outdoor operation.
• Do not touch the wires when the product is on. An
electrical shock can cause injury.
• Do not point compressed air to your body.
Compressed air can go into the blood stream.
• Always tighten the nuts and the bolts on the product
correctly.
• Do not use the power cord to lift the product. Do not
pull the power cord to disconnect the product.
• Do checks of the product for warning labels that are
damaged. Replace the warning labels that are
damaged.
• Always read the warning labels of product supplies.
• Obey the local waste regulations.
2.3 Symbols on the product
WARNING: Not careful or incorrect use
can result in injury or death to the operator
or others.
Read the manual carefully and make sure
that you understand the instructions
before you use the product.
Always put on hearing protection, eye
protection and breathing protection.
WARNING! The dust can cause breathing
problems. Use breathing protection. Do
not breathe exhaust fumes. Always make
sure that there is good airflow.
This product is in compliance with
applicable EC directives.
Note: Other symbols/decals on the product refer to
special certification requirements for some markets.
4 - Safety 1022 - 002 -

3 Servicing data
3.1 Symbols in the diagrams
Tightening torque, Nm
1022 - 002 - Servicing data - 5

3.2 Tightening torques
30
37
30
6 - Servicing data 1022 - 002 -

4 Servicing tools
4.1 Servicing tools overview
4 5 6
7 8
1 2 3
Po-
si-
tion
Designation Used for Order No./
Source
1 Thread lock medium To assemble the motor and grinding head. To assemble the tool
holder.
2 Grease To assemble the motor and grinding head.
3 Multimeter To control the functions of the electrical system Amprobe 37XR-
A® or other
model that can
measure induc-
tance
4 Hex key, kit 2.5 - 10
mm
General 525 45 52-01
5 Socket wrench General 531 11 95-32
6 Torque wrench 30 -
100 Nm
General
7 Inner puller To remove the tool holder assembly There are many
manufacturers,
for example:
Kukko, Baur-
eihe 202
8 Socket 8-18 mm General
1022 - 002 - Servicing tools - 7

5 Product overview for repair and servicing
5.1 Component overview PG 280 S
13 14
15
3
2
2
1
6
7
4
5
12
8
9
11
10
1. Handle/Handlebar
2. Lock knobs for handlebar adjustment
3. ON/OFF switch
4. Electrical enclosure
5. Connection for motor cable
6. Counterweight
7. Power plug
8. Rubber wheels
9. Lock bolt to attach the motor/grinding head
10. Grinding head cover
11. Electric motor
12. Lifting eye
13. Brush strip
14. Tool plate
15. Connection, vacuum hose
8 - Product overview for repair and servicing 1022 - 002 -

5.2 Component overview electrical enclosure
3
12
4
5
6
7
1. Electrical enclosure
2. ON/OFF switch
3. Ground points
4. Motor cable connector
5. Connection to mains plug
6. Resettable fuse
7. Terminal block
1022 - 002 - Product overview for repair and servicing - 9

5.3 Component view of the motor connection box PG 280 S 1-phase
2
7
1
4
6
8
3
5
1. Motor connection box
2. Electronic motor starter switch
3. Connection bridge
4. Motor run capacitor
5. Connection bridge
6. Connection to electrical enclosure
7. Ground point
8. Motor start capacitor
10 - Product overview for repair and servicing 1022 - 002 -

6 Repair and servicing
6.1 Motor
6.1.1 To remove the motor and grinding head
1. Remove the cable from the connector.
2. Remove the retaining pin (A) and remove the clevis
pin (B).
A
B
3. Remove the motor and grinding head from the
frame.
1022 - 002 - Repair and servicing - 11

6.2 Grinding head
6.2.1 To remove the grinding head
To remove the tool holder assembly, use an internal
puller and an extension. Refer to Servicing tools
overview on page 7 .
1. Remove the screw that attaches the holder
assembly to the motor shaft, with an impact wrench .
2. Put the internal puller claws (A) on the inner edges
of the center hole of the holder. Put the extension
(B) on the motor shaft (C).
AB
C
3. Remove the tool holder assembly from the motor
shaft slowly to prevent damage to the vibration
damping units.
4. Remove the tool holder assembly.
12 - Repair and servicing 1022 - 002 -

5. Remove the parts that hold the dust cover, spacer
and motor.
6. Remove the dust cover and the spacer.
7. Remove the spring pins in the grinding head
bracket.
8. Remove the dust cover from the motor bracket.
6.2.2 To assemble the grinding head and the motor
• When you assemble the grinding head and the
motor, use Thread lock medium and tighten the
screws, refer to
Servicing tools on page 7 .
1022 - 002 - Repair and servicing - 13

7 Troubleshooting
7.1 Function tests
The function tests show the condition of the electrical
system, the motor and the grinding head.
7.2 To do a function test of the grinding head
1. Put the product down to get access to the grinding
disc.
2. Rotate the grinding disc by hand. Make sure it can
move freely and stable without friction and noise.
3. Examine the brush strip.
4. Examine all parts of the vibration damping system.
5. Examine the tool holder for wear.
6. Tighten the screws.
7. Put the product back to it´s upright position.
7.3 To do a function test of the electrical
system
1. Put the product in upright position.
2. Examine the external cable, plug and connectors.
7.4 To do a function test of the motor
1. Remove the tools from the tool holder.
2. Push the handle down to slightly lift the tool holder
from the surface.
3. Start the motor with the start/stop switch. The motor
must then be at its operation speed in less than 5
seconds.
4. Examine the product for noise and vibrations while
the motor operates.
5. Let the motor operate for approximately 1 minute.
6. Push the stop button.
7.5 Before you do the troubleshooting
Before you do the troubleshooting, do the checks that
follow.
• The grinding head is slightly lifted from the surface
when the handle is pushed down.
• The power source has the correct voltage and fuse
rated value.
• The extensions cables are in good condition. They
are not too long and the gauge is as specified.
• The power plug and connectors between the
electrical enclosure and the motor are in good
condition.
• All wires in the electrical enclosure and in the motor
connection box are correctly connected.
14 - Troubleshooting 1022 - 002 -

7.6 The motor does not start
The electric motor is not
starting up or the start
up trial is interrupted.
ERROR:
Is the fuse in the
power source blowing
when trying to start
the motor?
Is the thermistor
fuse in the electrical
cabinet blowing?
Let the motor cool down. The
overload protection is automatically
reset after a couple of minutes. Is the
overload lamp lit up again when
trying to start the motor?
Does the fuse still blow?
Is the cable between the electrical
cabinet and the motor OK? Unplug the
machine, open up the motor connection
box and measure the cable between the
connection box and the motor cable
connector with a multimeter.
Is the voltage in
the connection
blocks for external
cable according to the
voltage specified
on the motor?
Reduce the load. Check
the power source and
extension cable
dimensions.
ACTION:
Replace the external
cable and plug.
ACTION:
Replace the cable
between the electrical
cabinet and the motor.
ACTION:
Is the voltage level in the motor
cable connector OK? Close the
electrical cabinet, disconnect the motor
cable connector, plug in the machine and
turn the stop/run switch to position “1”.
Measure the voltage in the motor cable
connector part that is mounted
to the electrical cabinet.
Change the motor
cable connector.
ACTION:
YES
YES
YES
NO
YES
NO
YES
NO
NO
YES
NO
NO
1022 - 002 - Troubleshooting - 15

Can the motor/
grinding disc easily
be rotated by hand?
Attention! The machine
must be
unplugged and
the grinding
tools removed!
Are all the wires
and connections in
the motor connection box
OK? Check with help
from the wiring
diagram.
Is the cable and
plug between the
machine and power source
OK? Check the cable
for continuity with
a multimeter. Replace the external
cable and plug.
ACTION:
Replace/connect wires
in the motor connection
box with help from the
wiring diagram.
ACTION:
Is the fuse in the power source
blowing when the motor cable is
disconnected from the electrical
cabinet during start up?
Check the components,
wires and connections
in the electrical cabinet
with help from the
wiring diagram.
ACTION:
Replace the electric
motor.
ACTION:
Are the starting
and running capacitors
OK? Measure the
capacitance with a
multimeter.
Are the motor
windings OK? Measure
the inductance with help
from this workshop
manual.
Replace the electric
motor.
ACTION:
Replace the electronic
motor starter switch.
ACTION:
Replace the capacitors.
ACTION:
YES
NO
YES
NO
NO
NO
YES
YES
YES
NO
NO
YES
YES
16 - Troubleshooting 1022 - 002 -

7.7 The motor stops
Can the motor/
grinding disc easily
be rotated by hand?
Attention! The machine
must be unplugged
and the grinding
tools removed.
Check the wires and
connections in the
electrical cabinet and the
motor connection box
with help from the wiring
diagram.
ACTION:
Reduce the load on the
motor. Check
the power source,
extension cable
dimensions and make
sure your grinding tool
selection is correct.
ACTION:
Replace the electric
motor.
ACTION:
Are the starting
and running capacitors
OK? Measure the
capacitance with a
multimeter.
Are the motor
windings OK? Measure
the inductance with help
from this workshop
manual.
Replace the electric
motor.
ACTION:
Replace the electronic
motor starter switch.
ACTION:
Replace the capacitors.
ACTION:
The electric motor stops
during operation.
ERROR:
Has the thermistor
fuse blown?
Has the fuse in the
power source blown?
Let the motor cool down.
The overload protection
is automatically reset
after a couple of
minutes.
ACTION:
Is the overload
lamp lit up when
trying to restart the
motor?
NO NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
YES
1022 - 002 - Troubleshooting - 17

8 Diagrams
8.1 Wiring diagram
U1Z2
V1U2
Z1V2
M
4 2
3 1
1-X3
-F1
14
A1
13
24 23
OUT IN
-K1
SWITCH
Electrical Box Door
Motor
POWER CONNECTOR
THERMISTOR
MOTOR
CONNECTOR
GND GND
GND
CONNECTION
BLOCK
ELECTRONIC
CENTRIFUGAL
SWITCH
RUN CAPACITORSTART CAPACITOR
-M1
-C2 -C1
BLUE WHITE
RED BLK
BLUE BRN GRN/Y
-Harting
04
02
03
01
05
01 08 03
010
EU:
1 Blue
2 Brown
3 Green/Yellow
09
CONNECTION
BLOCK
02
07
06
18 - Diagrams 1022 - 002 -

9 Technical data
9.1 Electrical specifications
Motor p/n Cert. Voltage (V) Frequency
(Hz)
Power (kW) Pha-
ses
Poles Flange size R. Ca-
pacitor
μF/VA
S. Ca-
pacitor
μF/VA
597048201 CE 220 50 2.2 1 4 B14 40/450 150/250
597048202 CE 230 60 2.2 1 4 B14 40/450 200/250
1022 - 002 - Technical data - 19

2019-04-23