Husqvarna DM 330 Manuel d'instructions
HUSQVARNA CONSTRUCTION PRODUCTS
Workshop manual
DM 330, DM 340
1. PRESENTATION – DM 330, DM 340 3
2. LITERATURE 4
3. COMPONENTS, WORK TIPS 5
4. BASIC STRUCTURE 6
5. GEAR HOUSING – PRIMARY SHAFT 8
6. SLIP CLUTCH 9
7. GEAR HOUSING – INTERMEDIATE SHAFT 10
8. GEAR HOUSING – SPINDLE SHAFT 12
9. GEAR HOUSING – BEARING REPLACEMENT 14
10. CARBON BRUSHES 15
11. WIRING DIAGRAM, CABLING – 230 V 16
12. WIRING DIAGRAM, CABLING – 120 V 17
13. ROTOR 18
14. STATOR – 230 V 20
15. STATOR – 120 V 21
16. TOOLS 22
CONTENTS Page
2525 59 31-26
HUSQVARNA
DM 330
DM 340
3
DM 330 – model versions
230 V or 120 V
The electric motor is designed for 230 V (220–240 V) with 2700 W motor
output and 120 V (100–130 V) with 2400 W motor output.
DM 330 Low Speed
This has a low gear ratio to the drill spindle and is intended for core drill
dimensions 50–350 mm.
DM 330 High Speed
This has a higher gear ratio to the drill spindle and is intended for core drill
dimensions 25–250 mm.
The only difference in design is the dimension of the gear wheel on the
spindle shaft and the intermediate shaft gear wheel to this.
DM 340
The gear box is identical to the DM330 Low Speed. The motor output is 3600
Watt. One external characteristic is the extended motor housing. The machine
is designed for drill dimensions up to 400 mm. The DM340 is only available
for 230 V mains voltage.
PRESENTATION – DM 330, DM 340 1
525 59 31-26
DM 330
Low Speed
DM 340
High Speed
4525 59 31-26
LITERATURE2
Workshop manual
The workshop manual covers virtually all work
in the workshop that involves the DM330 and
DM340 models. Some very simple and rather
obvious repair work has been omitted.
Disposition
The initial section entitled “Basic structure”
shows the fundamental design of the machine.
This arrangement means that mechanics who
have no experience of the machine must start
with this chapter.
Later on, the manual describes in detail in the
various chapters how the work is to be executed
for the basic modules.
Arrangement – illustrations and text
In addition to graphics and illustrations, there
are generally two text columns. The left-hand
text column gives a brief explanation and is
intended for experienced mechanics, whereas the
right-hand column is a more detailed descrip-
tion and is intended for mechanics with less
experience of repair work for this type of
machine.
Contents
The manual is divided into numbered chapters
as well as chapter headings that are specified in
bold at the top of each page.
The list of contents also has page references to
the start of each chapter.
Spares
Spares DM330, DM340
The folders include all spares for Husqvarna
DM330 and DM 340
The folder contains complete exploded
drawings for the whole machine where the
location, spares number and appearance of each
component is easy to identify.
HUSQVARNA CONSTRUCTION PRODUCTS
Workshop manual
DM 330, DM 340
”Basic structure”
”Gear housing – intermediate shaft” (Example)
5
COMPONENTS, WORK TIPS 3
Components
1. Drill spindle
2. Gear housing
3. Gear knob
4. Gear box cover
5. Leak hole (fault indicator)
6. Electric motor
7. Inspection cover for carbon brushes
2
67
8
3
1
5
13
4
11
12
Warning
A workshop often has a range of electrical tools at the workplace. It is not uncommon for the
wrong contact to be connected to the mains – perhaps to the very machine you are working with!
A simple way of highlighting this and preventing unintentional connections is to tape over the
contact pin.
Note: A machine that has been dismantled must not be connected to the
mains supply. Functional tests must not, and do not need to be made on a dismantled
machine that is connected to the mains.
8
9
10
14
8. SmartStart™
9. Circuit breaker
10. Load indicator
11. Mains cable
12. Water connector with valve
13. Attachment
14. Earth fault breaker
Work tip
The easiest and most convenient way of executing
virtually all service work on the DM330/DM340 is with
the machine in a vertical position with the drill spindle
facing downwards.
Do it yourself
A fixture for securing the machine in a vice is easily
made using a wood block and a pair of steel plates.
The wood block should be at an equal height to the
drill spindle, about 2 1/2 in. (55 mm). Drill a hole with
a diameter of 1 1/4 inches, corresponding to around 32
mm, in the block.
The two steel plates secure the wood block horizon-
tally in the vice.
It is even easier to drill a hole in the work bench.
BASIC STRUCTURE
Separation
Electric motor/gear
housing
Remove the four screws as
shown in the figure.
Separation
Electric motor/gear housing
Four screws hold the motor to the gear
housing. Remove these. The unit can
now be divided.
6
Water passage
Water to the drill spindle is routed directly in to the
spindle shaft from the water bracket (B). A seal holder (A)
is pressed into the gear box cover and seals with this using
two O rings. The small O ring is the seal to the water
bracket (B).
Shaft seal
The seal holder has two radial seals (C) that seal to the
spindle shaft. There is a space between these seals that is
located in connection to the leak channel (D).
Fault indicator
Any water or oil that leaks out through the leak channel
(D) indicates that the radial seals (C) are defective. Water
alone indicates that the upper seal is defective while oil
indicates that the lower seal to the gear housing is defective.
A mixture of oil and water shows that both seals are defec-
tive and that water has leaked into the gear housing.
Check during service
As a rule you should check that the seals are intact on the
machines that are to be serviced. If the seals show signs of
wear, or if the machine has many operating hours, the
seals should be replaced as a preventive measure.
4
A
A
12 3
B
C
Basic modules
The machine can be separated into three basic
modules:
1. The gear housing with three gear selection
positions.
2. The gear box cover which is the bearing carrier
for the shafts in the gear housing and separates
the oil-filled gear housing from the electric motor.
3. Electric motor.
Gear housing/electric motor
Virtually all service work requires the separation of the
gear housing from the electric motor.
D
Separation
Gear box cover/gear
housing
Remove the four screws.
Separation
Gear box cover/gear housing
Remove the four screws and lift out the
gear box cover from the gear housing.
Check when reassembling that the
upper screws have O rings.
Replacing seals
Set of seals 504 20 89-01
The set of seals consists of seal holder with double seals for the spindle shaft
and radial seal for the motor shaft.
Replace the seals when changing oil. If the machine has many working
hours, you should also replace the seals as a preventive measure. If there are
signs of leaks of oil or water, you must replace the seals. Check that there is
no water in the gear housing.
Note: You can replace the seal holder when the water bracket has been
removed.
Dismantling/assembly
1. The easiest way of removing the radial
seal for the motor shaft is by using a
counter stay device (see page 14).
Lubricate the radial seal using gear box
oil and fit the seal by pressing down with
a suitable tool socket.
2. Lift the seal holder to the spindle shaft
with a pair of screwdrivers.
Lubricate the O-rings and radial seals
when assembling.
Dismantling/assembly
1. Counter stay device facilitates
dismantling. Lubricate the seal
and fit with a suitable sleeve.
2. Lift up with screwdrivers.
Lubricate the O-rings and seals
when assembling.
7
BASIC STRUCTURE 4
504 20 89-01
Oil change in gear housing
You can change the oil when the motor has been removed from the gear
housing. Turn the machine vertically with the motor facing up when dis-
mantling.
Oil change
You must change the oil at 300 hour operational intervals. Drain and top up the
oil through the hole in the motor shaft. Volume around 0.5 litre. Oil quality:
Mobil Lube 1 SHC 75W-90, Shell Spirax ASX 75W-90 or equivalent quality.
When replacing the oil, the seals must be replaced as per the spares set
504 20 89-01.
12
Reassembly
Replace the O-ring around the
gear box cover.
Check that the upper screws to
the gear box cover have O rings.
Reassembly
Replace the O-ring around the gear box
cover with a new one with lubrication.
Check when reassembling that the upper
screws to the gear box cover have O rings.
GEAR HOUSING – PRIMARY SHAFT5
8
Function
The gear housing contains a transmission that reduces the high speed of the
electric motor to a lower speed on the spindle shaft. Transmission is based on
three shafts: primary shaft (A), intermediate shaft (B) and spindle shaft (C).
The electric motor powers the top gear wheel on the primary shaft. This gear
wheel has a slip clutch to the intermediate shaft to protect the operator and the
gear box in the event of jamming.
The transmission has three gear selection positions that are controlled by the
knob (D). Change gear when the motor is idle.
Service work
The work sequence is that the complete primary shaft (A) is removed first
followed by the intermediate shaft (B), although after the upper gear wheel on
the spindle shaft (C) has been removed.
Note: In order to remove the spindle shaft, you do not need to remove the
primary and intermediate shafts. See the “Spindle shaft” chapter.
Dismantling – primary shaft
Remove the oil pipe
First lift up the angled nipple.
Then lift the oil pipe straight up from
the control at the nipple. Then turn the
oil pipe so that it runs free from the gear
wheel at the bottom of the shaft and lift
out the oil pipe.
B
D
A
C
Dismantle the primary shaft
Use a standard puller and place the claws
under the top gear wheel.
Create a counterhold by placing a pair
of wooden strips on the gear housing
and make a bridge in between with, for
example, a cold chisel. Pull the shaft up
using the puller.
Lift up the complete slip clutch.
9
Tools
For adjustment of the slip torque, two special tools are needed that are
manufactured by Husqvarna along with a torque wrench.
531 12 31-22
Clamping ring with attachment for 1/2 inch ratchet/torque wrench.
522 91 40-01
Adapter for the above clamping ring.
Adjustment of slip torque
In order to provide the correct slip
torque, all parts must be thoroughly
lubricated with the type of oil used in
the gear housing.
Assemble the complete slip clutch in
the tools as per the figure. Tighten the
clamping ring screw to lock the gear
wheel.
Test the slip torque
Attach the unit in a vice with the jaws on
the slip clutch shaft.
Test the slip torque using a torque
wrench.
Slip torque: 30–32 Nm
22–24 lbf·ft
SLIP CLUTCH 6
Function
The electric motor powers the top gear wheel on the primary shaft. This gear
wheel has a slip clutch to the intermediate shaft to protect the operator and
the gear box in the event of jamming. Cup springs provide tensioning force
between the gear wheel and shaft. Flat friction washers are placed on both
sides of the gear wheel.
You can adjust the slip torque if this is necessary by measn of the nut on
the shaft.
Adjust the slip torque
Attach the unit with the jaws on the slip
clutch nut. Increase or decrease the con-
tact (torque) slightly. Test the slip torque
as per the figure above again.
Repeat the procedure until the clutch has
the correct slip torque.
Dismantling
If the slip clutch is dismantled into its
component parts, it is important that the
cup springs are turned correctly when
reassembling. Friction washers are placed
on both sides of the gear wheel.
Lubricate the parts when assembling
to allow you to adjust to the correct slip
torque.
531 12 31-22 522 91 40-01
+
–
10
Dismantling –
intermediate shaft
Gear selection position 2
Set the gear selector to position 2.
Remove the circlip and lift up the
gear drive
Remove the circlip on the spindle shaft
using circlip pliers. Lift out the gear
drive.
Remove the wedge
Remove the wedge on the spindle shaft.
Remove the intermediate shaft
Use a standard puller and place the claws
under the first gear wheel.
Create a counterhold by placing a cold
chisel, for example, on the gear housing.
Press the shaft up using the puller.
Remove the circlip
Remove the circlip using circlip pliers.
Lift out the gear wheel
GEAR HOUSING – INTERMEDIATE SHAFT
Lift off the gear drive
7
Autres manuels pour DM 330
2
Ce manuel convient aux modèles suivants
1
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