Pfaff 335 User manual

335
Instruction manual
296-12-18 393/002
Betriebsanleitung engl. 06.05
This instruction manual applies to machines from the
following serial numbers onwards:
# 2432978

This Instruction manual is valid for all models and subclasses listed in the
chapter "Specifications".
The reprinting, copying or translation of PFAFF Instruction Manuals, whether in whole or in
part, is only permitted with our previous authorization and with written reference to the source.
PFAFF Industrie Maschinen AG
Postfach 3020
D-67653 Kaiserslautern
Königstr. 154
D-67655 Kaiserslautern

Contents
Contents ................................................................................. Chapter - Page
1Safety ........................................................................................................................... 1 - 1
1.01 Directives ...................................................................................................................... 1 - 1
1.02 General notes on safety ................................................................................................ 1 - 1
1.03 Safety symbols ............................................................................................................. 1 -2
1.04 Important points for the user ........................................................................................ 1 - 2
1.05 Operating and specialist personnel ............................................................................... 1 - 3
1.05.01 Operating personnel ...................................................................................................... 1- 3
1.05.02 Specialist personnel ......................................................................................................1- 3
1.06 Danger .......................................................................................................................... 1 - 4
2Proper use.................................................................................................................... 2 -1
3Specifications .............................................................................................................. 3 - 1
3.01 PFAFF 335 ..................................................................................................................... 3- 1
3.02 Versions and subclasses ............................................................................................... 3- 1
4Disposal of machine ................................................................................................... 4 - 1
5Transport, packaging and storage ............................................................................. 5 - 1
5.01 Transport to the customer ............................................................................................ 5 - 1
5.02 Transport within the customer’s premises ................................................................... 5 - 1
5.03 Disposal of the packaging ............................................................................................. 5 - 1
5.04 Storage ......................................................................................................................... 5 - 1
6Explanation of the symbols ........................................................................................ 6 - 1
7Controls ....................................................................................................................... 7- 1
7.01 On/off switch ................................................................................................................7- 1
7.02 Pedal ............................................................................................................................. 7 - 1
7.03 Lever for lifting the presser foot .................................................................................... 7 - 2
7.04 Stitch-length adjustment lever / reverse sewing ........................................................... 7 - 2
7.05 Adjustment nut for the top feed lift ............................................................................... 7 - 3
8Mounting and commissioning the machine ............................................................. 8 - 1
8.01 Installation ..................................................................................................................... 8 - 1
8.01.01 Adjusting the table height ............................................................................................. 8 - 1
8.01.02 Tightening the V-belt .....................................................................................................8- 2
8.01.03 Fitting the upper belt guard ........................................................................................... 8 - 2
8.01.04 Mounting the lower V-belt guard ................................................................................... 8 - 3
8.01.05 Fitting the reel stand ..................................................................................................... 8 - 3
8.01.06 Fitting the synchronizer ................................................................................................. 8- 4
8.02 Commissioning ............................................................................................................. 8 - 4
8.03 Switching the machine on/off ....................................................................................... 8 - 4
8.04 Table top cutout ............................................................................................................ 8- 5

Contents
Contents ................................................................................. Chapter - Page
9Preparation .................................................................................................................. 9 - 1
9.01 Inserting the needle ...................................................................................................... 9 - 1
9.02 Winding the bobbin thread, adjusting the thread tension .............................................. 9 - 2
9.03 Removing / Inserting the bobbin case ........................................................................... 9 - 3
9.04 Threading the bobbin thread and regulating the bobbin thread tension ......................... 9 - 3
9.05 Threading needle thread/adjusting needle thread tension ............................................. 9 - 4
10 Care and maintenance .............................................................................................. 10 - 1
10.01 Care and maintenance intervals .................................................................................. 10 - 1
10.02 Cleaning ...................................................................................................................... 10 - 1
10.03 General oiling .............................................................................................................. 10 - 2
10.04 Oiling the sewing hook ............................................................................................... 10 - 3
10.05 Oiling the needle-head parts ....................................................................................... 10 - 3
10.06 Lubricating the bevel gears ......................................................................................... 10 - 4
10.07 Checking/adjusting the air pressure ............................................................................ 10 - 5
10.08 Cleaning the air filter of the air-filter/lubricator ............................................................. 10 - 5
11 Adjustment ................................................................................................ 11 - 1
11.01 Notes on adjustment................................................................................................... 11 - 1
11.02 Tools, gauges and other accessories .......................................................................... 11 - 1
11.03 Abbreviations .............................................................................................................. 11- 1
11.04 Adjusting the basic machine ....................................................................................... 11 - 2
11.04.01 Lateral positioning of the feed dog .............................................................................. 11 - 3
11.04.02 Lengthwise positioning of the feed dog ...................................................................... 11 - 3
11.04.03 Height of the bottom feed dog (only on machines with lifting phase – P-version) ....... 11 - 4
11.04.04 Centering the needle in the needle hole ...................................................................... 11 - 5
11.04.05 Pre-adjusting the needle height ................................................................................... 11 - 6
11.04.06 Driving motion of the top and bottom feed dogs ........................................................ 11 - 7
11.04.07 Lifting motion of the bottom feed dog (only on machines with lifting phase – P-version) .... 11 - 8
11.04.08 Needle rise, hook-to-needle clearance and needle height ........................................... 11 - 9
11.04.09 Vibrating presser lift ....................................................................................................11-10
11.04.10 Vibrating presser feeding motion ................................................................................ 11 - 11
11.04.11 Needle thread tension release .................................................................................... 11 - 12
11.04.12 Thread check spring .................................................................................................... 11 -13
11.04.13 Bobbin winder .............................................................................................................11-14
11.04.14 Regulating the pressure on the presser foot ............................................................... 11 - 15
11.05 Adjusting the thread trimmer -900/52 (optional) .......................................................... 11 - 16
11.05.01 Preadjusting the control cam ...................................................................................... 11 - 16
11.05.02 Tripping lever height .................................................................................................... 11 - 17
11.05.03 Feed regulator pin ....................................................................................................... 11 - 18
11.05.04 Engaging solenoid ....................................................................................................... 11-19
11.05.05 Adjusting the height of the feed regulator pin ............................................................. 11 - 20
11.05.06 Thread catcher, front point of reversal ........................................................................ 11 - 21

Contents
Contents ................................................................................. Chapter - Page
11.05.07 Lateral adjustment of the thread catcher .................................................................... 11 - 22
11.05.08 Control cam, final adjustment ..................................................................................... 11 - 23
11.05.09 Knife ............................................................................................................................ 11 - 24
11.05.10 Triggering the needle thread tension ........................................................................... 11 - 25
11.05.11 Cutting test ................................................................................................................. 11 - 26
11.05.12 Positioner .................................................................................................................... 11 - 27
12 Wearing parts ............................................................................................................ 12 - 01

Safety
1 - 1
1 Safety
1.01 Regulations
This machine has been made according to the European regulations indicated in the
conformity and manufacturer’s declarations.
In addition to this instruction manual, please also observe all generally accepted statutory
and other legal requirements, including those of the user’s country, and the valid pollution
control regulations! The locally valid regulations of the social insurance institution responsible
for occupational accidents, or other supervisory authorities, must be strictly adhered to!
1.02 General notes on safety
●The machine must only be operated when the instruction manual has been fully read and
understood, and only by operators who have had the necessary training!
●All notes on safety and the instruction manual of the motor manufacturer must be read
before the machine is put into operation!
●All notices on the machine referring to danger and safety must be observed!
●The machine must be used for the purpose it is intended for and must not be operated
without its safety devices; all regulations relevant to safety must be adhered to.
●When part sets are changed (e.g. needle, presser foot and needle plate), during
threading, when the workplace is left unattended and during maintenance work, the
machine must be isolated from the power supply by pressing the on/off switch or
removing the plug from the mains!
●Daily maintenance work must only be carried out by appropriately trained persons!
●Repairs and special maintenance work must only be carried out by qualified technical
staff or persons with the appropriate training! Exceptions to this are only allowed for
adjustment and function checks by appropriately trained personnel!
●Repair work and special maintenance work must only be carried out by technical
personnel or by persons with the appropriate training!
●Work on the electrical equipment must only be carried out by technical staff who are
qualified to do so!
●Work on parts or equipment connected to the power supply is not permitted! The only
exceptions to this are specified in regulations EN 50110.
●Conversion or modification of the machine must only be carried out under observation of
all relevant safety regulations!
●Only spare parts which have been approved by us are to be used for repairs! We draw
special attention to the fact that spare parts and accessories not supplied by us have not
been subjected to testing nor approval by us. Fitting and/or use of any such parts may
cause negative changes to the design properties of the machine. We shall not accept
any liability for damage caused by the use of non-original parts.

Safety
1- 2
1.03 Safety symbols
Danger!
Special points to observe.
Danger of injury to operating or technical staff!
1.04 Important notes for the user
●This instruction manual is part of the equipment of the machine and must be available to
the operating staff at all times.
●The instruction manual must be read before the machine is operated for the first time.
●Both operating and technical staff must be instructed on the safety devices of the
machine and on safe working methods.
●It is the duty of the user to operate the machine in perfect running order only.
●The user must ensure that none of the safety devices are removed nor put out of
working order.
●The user must ensure that only authorized persons operate and work on the machine.
For further information please refer to your PFAFF agency.
Caution
Do not operate without finger guard and safety devices.
Before threading, changing bobbin and needle, cleaning
etc. switch off main switch.
I

Safety
1 - 3
1.05 Notes for operating and technical staff
1.05.01 Operating staff
Operating staff are the persons responsible for setting up, operating and cleaning the
machine and for removing any disturbances in the sewing area.
The operating staff must be sure to observe the following items:
●always observe the notes on safety in this instruction manual in their work!
●refrain from any working methods which adversely effect the safety of the machine!
●avoid wearing loose clothing or jewelry such as necklaces or rings!
●also make sure that only authorised persons are allowed near the danger area of the
machine
●immediately report to the user any changes to the machine that may affect its safety!
1.05.02 Technical staff
Technical staff are persons who have been trained in electrical engineering, electronics,
pneumatics and mechanical engineering. They are responsible for lubricating, servicing,
repairing and adjusting the machine.
The technical staff must be sure to observe the following items:
●always observe the notes on safety in this instruction manual in their work!
●press the on/off switch before carrying out adjustment and repair work, and ensure it
cannot be switched on again unintentionally, or isolate the machine from the power
supply by removing the mains plug!
●never work on parts or equipment still connected to the power supply! Exceptions to this
are only permissible according to regulations EN 50110;
●replace all safety covers after carrying out maintenance or repair work and, if applicable,
close the electrical control box again!

Safety
1- 4
1.06 Danger symbols
A working area of 1 metre is to be kept free both in front of and behind the
machine while it is in operation so that it is always easily accessible.
Never reach into the sewing area while sewing!
Danger of injury by the needle!
Never leave objects on the table or in the needle plate area while adjusting the
machine settings! Objects can become trapped or be slung away! Danger of
injury!
On mechanical clutch-motors without an actuating lock, wait until the motor
comes to a standstill before working on the machine! Danger of injury!
Do not run the machine without take-up lever guard 1!
Danger of injury by moving take-up lever!
Do not run the machine without belt guards 2and 3!
Danger of injury by rotating v-belt!
Do not run the machine without finger guard 4!
Danger of injury by up and down movement of needle!
Do not run the machine without cylinder-bed cap 5!
Danger of injury by rotating hook!
Fig. 1 - 01
1
4
5
2
3

Proper use
2 - 1
2 Proper use
The PFAFF 335 is a single needle, free-arm sewing machine with bottom, top and needle
feeds for sewing lockstitch seams.
Any use of this machine which is not approved by the manufacturer shall be
considered as improper use! The manufacturer shall not be held liable for any
damage arising out of improper use! Proper use shall also be considered to
include compliance with the operation, adjustment, service and repair measures
specified by the manufacturer!

Specifications
3 - 1
3 Specifications
3.01 PFAFF 335◆
Stitch type: ................................................................................................... 301 ( lockstitch)
Model: ................................................................................................................................. B
Needle system: ......................................................................................................... 134 - 35
Needle thickness (Nm) in 1/100 mm: ........................................................................ 80 - 100
Max. stitch length:
on sub classes -940/01-6/01 ..................................................................................... 4,5 mm
on sub classes -2/27; -6/01; -17/01; -39/21 ................................................................ 6,0 mm
Handwheel effective dia.: .......................................................................................... 80 mm
Max. speed: .......................................................................................................... 2800 spm
Dimensions of the machine:
Free-arm head dia.: .................................................................................................... 51 mm
Free-arm size: ............................................................................................. approx. 165 mm
Length: ........................................................................................................ approx. 770 mm
Width: ......................................................................................................... approx. 380 mm
Height: ........................................................................................................ approx. 630 mm
Width of fabric clearance: ........................................................................................ 265 mm
Height of fabric clearance: ....................................................................................... 115 mm
Clearance under the sewing foot: ................................................................................ 7 mm
Net weight (sewing head): ............................................................................... approx. 40 kg
Working air pressure: .................................................................................................... 6 bar
Air consumption: ...................................................................................... ~0.8 l / work cycle
Motor data: .............................................................................. see motor specification plate
Noise data:
Emission sound level at workplace at a speed of 1800 spm: ..................... Lpa = 81.0 dB(A) ■
(Noise measurement in accordance with DIN 45 635-48-B-1, ISO 11204, ISO 3744, ISO 4871)
3.02 Versions and subclasses
Version B: .................................................................... for sewing medium-weight materials
Version P: ...................................................... additional lifting phase of the bottom feed dog
Additional equipment:
Subclass -900/52 .......................................................................................... Thread trimmer
Subclass -911/97 .................................................................................... Backtacking device
◆ Subject to alterations
■ KpA = 2,5 dB

Disposal of the machine
4 - 1
4 Disposal of the machine
●The proper disposal of the machine is the responsibility of the user.
●The materials used for the machine are steel, aluminium, brass and various plastics. The
electrical equipment consists of plastics and copper.
●The machine must be disposed of in accordance with applicable local pollution control
regulations. If necessary, a specialist is to be consulted.
Special care is to be taken that parts soiled by lubricants are separately
disposed of in accordance with the applicable local environmental pollution
control regulations!

Transportation, packing and storage
5 - 1
5 Transportation, packing and storage
5.01 Transport zum Kundenbetrieb
Die Maschinen werden komplett verpackt geliefert.
5.02 Transportation to customer's premises
The machines are delivered completely packed.
5.03 Disposal of packing materials
The packing materials of this machine comprise paper, cardboard and VCE fibre. Proper dis-
posal of the packing material is the responsibility of the customer.
5.04 Storage
If the machine is not in use, it can be stored as it is for a period of up to six months, but It
should be protected against dust and moisture.
If the machine is stored for longer periods, the individual parts, especially the surfaces of
moving parts, must be protected against corrosion, e.g. by a film of oil.

Explanation of the symbols
6 - 1
6 Explanation of the symbols
In this Instruction Manual, work to be carried out and important information are drawn to
your attention by symbols. The symbols have the following meanings:
Note, information
Cleaning, care
Lubrication
Servicing, repairing, adjustment, maintenance
(only to be carried out by specialist personnel)

Controls
7 - 1
Fig. 7 - 01
7 Controls
7.01 On/off switch
●Switch the machine on or off by turning
main switch 1.
The switch in the illustration can
be found on machines with Quick
motors. When other motors are
used, the switch may not look
the same.
77
-
005
1
7.02 Pedal
0= Machine stop
+1 = Sew
- 1 = Raise presser foot (on
machines with -911/97)
- 2 = Trim thread
(on machines with thread trimmer
-900/52)
+ 3 = Raise presser foot (on machines
without automatic presser-foot -
911/97)
Other pedal functions can be
found in the Motor Instruction
Manual.
Fig. 7 - 02
0
- 2- 1
+ 1
+ 3

Controls
7 - 2
Fig. 7 - 04
7.04 Stitch-length adjustment lever / reverse sewing
●Adjust the stitch length by turning the
milled nut on lever 1 as required.
Reverse sewing
●For reverse sewing, push lever 1up
during sewing.
Fig. 7 - 03
7.03 Lever for lifting the presser foot
●To lift the presser foot, raise lever 1.
1
1
-+

Controls
7 - 3
7.05 Adjustment nut for the top feed lift
Switch off the machine!
Danger of injury if the machine
is started accidentally!
●Open cover 1on the back of the
machine, loosen nut 1and move it as
required.
Fig. 7 - 05
2
1
+
-

8 - 1
Mounting and commissioning the machine
Fig. 8 - 01
1
2
1
8 Mounting and commissioning the machine
The machine must only be mounted and commissioned by qualified personnel!
All relevant safety regulations are to be observed!
If the machine is delivered without a table, be sure that the frame and the table
top which you intend to use can hold the weight of the machine and the motor.
It must be ensured that the supporting structure is sufficiently sturdy, even
during sewing operations.
8.01 Installation
The site where the machine is installed must be provided with suitable connections for the
electric current, see Chapter 3 Specifications.
It must also be ensured that the standing surface of the machine site is firm and horizontal,
and that sufficient lighting is provided.
For packing reasons the table top is in the lowered position. The table height is
adjusted as described below.
8.01.01 Adjusting the table height
●Loosen screws 1 and 2and set the table height as required.
●Firmly tighten screw 1.
●Set the required pedal position and tighten screws 2.

8 - 2
Mounting and commissioning the machine
8.01.02 Tightening the V-belt
●Loosen nuts 1.
●Tighten the V-belt using the dolly
switch 2.
●Tighten nuts 1.
Fig. 8-02 shows a Quick motor. If
another motor is used proceed as
described in the instruction
manual!
Fig. 8 - 02
Fig. 8 - 03
2 cm
12
4
1
5
3
6
2
8.01.03 Fitting the upper belt guard
If a large balance wheel is in
use, break off corner 1of belt
guard part 3.
●Screw stop piece 2onto belt guard part 3.
●Screw on belt guard part 3onto the
housing.
●Screw on belt guard part 4 onto the
housing.
●Secure belt guard parts 5 and 6onto the
table top.

8 - 3
Mounting and commissioning the machine
8.01.04 Mounting the lower V-belt guard
●Align the V-belt guard 7in such a way
that both the motor pulley and the V-belt
run freely.
●Tighten screws 8.
Fig. 8-04 shows a Quick motor. If
another motor is used proceed as
described in the instruction
manual!
8.01.05 Fitting the reel stand
●Fit the reel stand as shown in Fig. 8 - 05.
●Afterwards insert the stand in the hole in
the table top and secure it with nuts pro-
vided.
Fig. 8 - 05
Fig. 8 - 04
8
8
7