HAMANN MANUS » R «
RESTORATION & MAINTENANCE
The calculator came blocked.
Only moving was the (left) Counter-Clear-Lever (L)
BUT WITH NO EFFECT !

HOW TO OPEN THE MANUS-R:
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Remove all RED/WHITE LEVER-CAPS, the GREEN COVERS,
the [ 1 2 ... 8 ] FRONT-PLATE & the 2 TRIANGLES underneath.
(see below)
Then remove the CARRIAGE-SPRING behind the carriage.
Now the carriage can be taken out for inspection:

OhOh!
The blocked counter was forced with the clear-lever (L)
until the bonding of the gear (B)
was sheared-off from its axle (A)

TAKING THE GEARS APART:
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Remove the right CLEAR-LEVER (R).
The CLEAR-GEAR-UNITS (CC = Counter) & (CA = Arithmetic)
have 3 FIX-POINTS:
left (= FL) + middle (=FM) + right (= FR).
With a 90° DOWN-TURN of the 3 fix-points both units
(CC) & (CA) and (FM) can be taken out.
Now the CLEAR-LEVER-AXLE (A) can be pulled out,
because the bonding (A/B) is missing ...



REASSEMBLING CLEAR-AXLE (A):
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The "Broken Pieces" in the (A/B) connection removed,
DISPLAY-GEARS (DC = Counter)  & (DA = Arithmetic),
also Washers, Distance-Pieces, PART (X) & GEAR (B)
had to be placed in the right sequence on the axle (A).
After TRIAL & ERROR  until "free spinning"
a new "Bond-Nail" could be inserted in (B).

INSTALLATION OF THE CLEAR-GEARS (CC) & (CA):
********************************************
Install all of the RIGHT CLEAR-LEVER (R).
Set the DISPLAY WHEELS (DC = Counter) & (DA = Arithmetic)
TO ZERO and the TWIN-DELETE-LEVERS (L) & (R) UPRIGHT.
Insert CLEAR-GEARS (CC=Counter) & (CA=Arithmetic) w. (FM) so,
that their "GAPS" are facing the DISPLAY-GEARS (DC) & (DA).
LOCK the FIXPOINTS (FL), (FM) & (FR) with 90° UP-TURN.
The positions are OK, when the DISPLAY-GEARS are movable
AND
the PULL OF THE CLEAR-LEVERS bring the DISPLAYS to ZERO.

T E S T :
*********
Put back the carriage ...



... WOW! The HAMANN MANUS-R works again ...



... Last task: Install the covers & lever caps ...

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impressum:
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© C.HAMANN        http://public.beuth-hochschule.de/~hamann       11/13/13