Technical Information Pages for the Rstoration of
the BMW R75 and Zündapp KS 750.
Editor: ERSATZTEIL DIENST
Hans-Peter HOMMES 41363 Jüchen Kamphausen 156 C/2
Monthly available on our website
www.wehrmachtsgespann.de
No. 26
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Subject
The Jack
STORZ 21, G 4, BILSTEIN
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Editor
H - P Hommes |
© 2012 h-p hommes |
Datenschutzerklärung
The
Jack.
There are always offers of jacks declared as a jack for Zündapp KS 750 and BMW
R75 for sale.
The
jacks that are offered as originals for our bikes are:
The
Stortz, the G 4 and the BILSTEIN.
What information is available?
1.
It is mentioned in the spare parts list.
2.
It is displayed on several images and drawings of the operating and maintenance
instructions. Here it has always a plate below his foot and it is small and
compact.
3.
In an original letter from BMW to the Wehrmacht, it is included in a list.
Without brand but with the description 190/290. This should be the min. and the
max. height of the jack.
4. A
few years ago my friend Andreu bought a very original preserved BMW R75 in a
Spanish village. In the sidecar were the two jacks, a STORZ and G 4 Are these
therefore originals?
5. In my opinion Sido from Holland has the correct jack. The BILSTEIN, 165/355.
It is two times extendable and fits precisely under the bike and with its 355 mm
it is high enough to lift the sidecar
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The left jack:
It has a min. / max. height of 190/290.
It is labeled Stortz 21 GF.
The heights are the same as in the BMW letter and were found in a BMW
sidecar. But that's about all. The painting is, even if you can interpret it
as Wehrmacht beige in this photo, clearly lacquered silver-color.
The right jack:
It has a min. /max. height of 130/170 mm + 30
mm for wood.
It is labeled G 4
The painting is clearly RAL 7021 dark gray.
Even compared with the pictures in the spare parts catalog it can be
recognized that this one is a compact little jack and not a rather slim long
as this one.
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When using it it shows:
The Stortz 21 jack is with 190 mm height too high to get it under the
frame or the engine (170 mm) of Zündapp. It is impossible to put a board
below to reduce the earth.
The G 4 jack fits exactly under the frame and the engine. When max.
lifting the front wheel is raised so far that it can just be rotated freely.
However, it is not enough to take out the wheel.
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The G 4 is useful for the engine and the frame. To
lift the side car frame a first height of 290 mm would be required. You have
to put a lot of wood underneath using the G 4 jack.So it is not the
right one for our bikes.
The STORZ with a wooden plate of 30 mm would cope
fine with it. But it does not fit under the engine.
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BILSTEIN
165 mm min. height and 355 mm max. height
With steel plate for better earth pressure.
two times extendable
Here everything is perfect.
It just looks like in the spare parts list and can perform all the
necessary uplifts on our bikes.
For me there is only one more question: Why does the letter from BMW to the
Armed Forces state the measurements 190/290?
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We offer:
spare parts + accessories + repair for engine, transmission, etc. of the
Zündapp KS 750 and 600
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We offer:
spare parts + accessories + repair for the
BMW R75 and Zündapp |
H-P Hommes Ersatzteil-Dienst
Ersatzteile + Instandsetzungen
repairing + restoring
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