PFAFF

R 5315
i-n I
PFAFF 234
High-Speed Sewing Machine
INSTRUCTION BOOK

Fis.20
R 5090
/. Hold the bolonce wheel in this position ond turn lhe hook on its shoft
until its point is opposite the center line of rhe needle. Slightly tighten
whicheveÍ hook sel screw con be reoched mosl eosily.
L Check whether the hook point is obout 3ir." (1.2 mm) obove ihe rop
of the needle eye. If odiusiment is required, loosen set screw c (Fig, l9)
ond set fhe needle bor ot ihe correct height.
9. Check whether lhere is o cleoronce of .004" (0.1mm) belween lhe hook
point ond lhe needle. Moke sure thot the hook point will never choíe
ogoinst lhe needle.
10. Tighleo boih hook sel scíews
pres5er Íoot.
sêcurely ond reploce needle plole ond
To focilitote setting the needle bor ot the coírect height, o smoll depression
obout t/e." wide hos been milled into the bor. When the needle bor
hos reoched the lowest point of its siroke, the top of this mork shoulo oe
Ílush with the boitom edge of the lower needle bor bushing. The width of
lhis mork coincides with ihe omount of needle rise reouired lo Íorm
the loop. In other words, when the needle bor hos risen obout 5/r." Írom
the lowesl point of its ltrole, the hook point should be opposite lhe centeí
line of the needle.
This lost odjustment pÍocedure, however, is not prêcise enough.

Inslruclions Íor Mechanics
17, The V-Beh Drive
When mounling the V.beli for the first time, core should be token thof il
rs nol forced on the motoí pulley becouse o crookedly mounied belt weors
out ouicklv.
Íhe vorious moto.s used lo drive ihe PioÍ.23.i cre siondord molors con.
lorming to Germon DIN 42ó91 speciíico'ons. ïhey ore pivotolly connected
wilh lhe motor brockei by meons oÍ c h n_qe s:ud ond. oíier loosening o
sel screw or nul, con be swung to ony des ea cos i on to focilitote mounr.
ing lhe bell on lhe mochine ond moto- c- ers See io:or picr.rrec n
Fio. I7l
Fig l7
The tension musl noi be set ioo tight os thrs would couse excessrve pressure
on lhe orm shoft beorings ond might result in overheoting ond seizing oÍ
lhe mochine.
The bell is lens oned corrcclly ií you con cornpfess il obout i! oÍ on inch
midwoy belween both pulleys.
Tighten the h nge siud nul (or set screw k on moiors
so lhol il will no; loosen while sewing.
Fig. l7) securely
18

Fig.6
R 4345
8. Choosing the Proper Needle
The Píoff 234 uses the Íollowing round-shonk, round-poini needles:
Model A System 134 nêedtes
Model B - System l3J needtes
Model C Sysïêm 134 needles
Necdle ond lhreod Chort
Needle Size Corlon s itk Synthetic Lrnen
6l
t30 3
130i,1
1403
200i 3 I50/3
:l
r 00.,3
100,I
120r3
140'3 - r 2c 3
BO
80/3
80'4
100/3
I 20/3 - 1003
90
70/3 -ó0i3
70t4-ó0,'4
80/3
r00/3- 80,'3
70t3
't00
50t3 - 40/3
5A/4 - 40/4
70/3
70/3
60/3
0
3Cr/3
30/4
30ió
60/3
ó0l3
50/3

Oil seoler screw 2 (Fig. l) on the top covoí hos two oilwicks qttoched fo
it whió providê for on odditionol lubricotion of the feed eccentric ono,
therefore, should be sooked with oil thoroughly. Both the verticol shofr rop
beoring ond the upper bevel geor ossembly con b6 oiled qÍter tqking out
cop screw 3 (Fig, 1). The needle bor is lubricoted by meons oÍ on oilwick
which leods down Írom the tqke-up guord ond is jooked with sproy oil.
Form lhe. hobii oÍ pufting o drop oÍ oil into the hook rocewoy severol
lrmes o cloy.
Cerloin. sewing .lroubles, such os lhreod breoking ond stitó skipping,
connol be remedied by opplying excessive quonlities of oil. Excess oil qno
lint tend lo form o pocked moss which, in time, will couse hord running oÍ
ihe moóine ond soiling of the work.
Mokr it o rulc, thereÍore, to qpply oil rporingly but regulorly.
Alwoys use PfofÍ sewing mochine oil No.28GllmI22
non-resinous.
whió is completely
Although the bevel geors ore enclosed in coses ond require no speciol moinlenonce,
il is recommended to reploce the old greose by Pfoff greose No.
2&-l-12O 213 once o yeor. Owing fo the speciol Ébricoting propeities of this
greose, the flonks of the bevel geor teeih should be greoled only lightly.
From lime to iime, unscrew the needle plote ond remove lhe lint which
hos occumuloted on the Íeed dog ond in the viciniry oÍ the sewing hook.
This ir very impo.tont becouse this lint contoins smoil porticles of dressing
which couse excessive weor of the sewing meóonism. On moclrines which
oÍe in opeÍolion constontly, the lini musl be removed every doy.
5, lemoving the Bobbin Cose
Roise the toke-up lever to its highest position ond open the bed slide. Reocn
under lhe toble wiih your left hond ond open the bobbin cole loích with
the noil of your thumb. Pull out the bobbin cose by holding rhe lotch with
thumb ond ÍoreÍinger, os shown in Fig.4. While you hold the bobbin cose
by its open lotch, the bobbin connot foll out.
6. Winding rhe Bobbin
Bobbins ore wound wilh lhe power-driven bobbin winder (Fig.5), which
requires no lub.icotion since its spindle runs in q sinlered steel bushing.
A bofÍle plote mounled on the winder bose prevents the lhreod from berng
pulled loword the driving belt by ihe droÍt of oi. cqused by the belr. Thé
V-groove in the rim of lhe winder pulley hos on obtuse-ongled profile which
permih lhe use of both round ond V-belts.