R E M A R K S :
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 [1st]  "How to operate the ORIGINAL-ODHNER-239 ?"  See ODHNER MAIN-SITE ...
 [2nd]  "How to START & FINISH  Restoration / Maintenance ?"
                                                ===>>>  Purpose of THIS WORKSHOP ...
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From Berlin FleaMarket  " M O S T   F U N C T I O N S   L O C K E D "   =   OhOh !!!
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YELLOW INVENTORY TAG = "Theoretischer Maschinenbau / Technische Universitaet Berlin"
May be I have used THIS MACHINE in the TUB-LAB as an Engineer-Student in the 1960s ? 

OPEN THE ODHNER-239 ...
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 o CLEAR all registers ( if possible - IF NOT, TRY TO CONTINUE ! )
 o Flip the calculator upside down. See Pictures (1) & (10): Remove the 2 screws of
   the CARRIAGE-LIMITER and pull it out.  Flip the calculator upside again.  See
   arrow in (10): Press the FRONT-LEVER with the left hand and pull-out the CARRIAGE
   to the right with the right hand.
 o Flip the calculator upside down again. Loose the 4 screws in the center of the
   4 feet. Lift the BOTTOM-PLATE with feet and screws. Now there is access to the
   2x2 screws of the side-plates, 3 screws of the front-unit and 3 screws of the
   back-unit ... Remove the screws.
 o Start to remove the LEFT-SIDE-PLATE: Be aware of its 2 clips!
 o Move the RIGHT-SIDE-PLATE ( has 2 clips too!) to the right.
   See (2): Unscrew and remove the CRANK-LOCK. Remove the right-side-plate ...
 o Remove the FRONT-UNIT ( pressing both black keys !)
 o Flip the calculator upside again.
 o Remove the 2x2 screws of the TOP-UNIT.
 o Remove the TOP- and BACK-UNIT.
 o Remove the CARRIAGE-COVER -  but  N O T  the CARRIAGE-SIDE-PLATES.
 o Replace the 4 CARRIAGE SCREWS.
IN WORST CASE ...                        [*]
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... the carriage is not removable, because the input-unit could not be cleared.
See (4) ... (7): The BEARINGS OF THE INPUT-UNIT HAVE TO BE REMOVED! Press-down
the FRONT-LEVER with a CLIP to have free hands: LIFT-AND-WIGGLE the INPUT-UNIT
with the left hand so, that with the right hand the CARRIAGE could be moved STEP-
BY-STEP OUT TO THE RIGHT ... Observe (5) the "Reverse-Lock" synchronisation!

ASSEMBLING THE ODHNER-239  after CLEANING,  R E P A I R  &  OILING ...
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< S T A R T >

 o Replace the 4 FEET temporarely to have CEARENCE for TEST-Operation !!!

Set INPUT-UNIT to ZERO - Set INPUT-DISPLAY to ZERO. Place INPUT-CYLINDER so, that
ZERO-LEVERs on top. Replace RIGHT BEARING temporary. Place the COUNTER-FINGERs
as shown in (8a)&(8b). Replace the LEFT BEARING temporary. It should be working:
 o Cranking the Input-Unit clockwise & counter-clockwise.
 o The "TOP-FINGER" has to pass the "GAP" in the axle!
 o The "DOWN-FINGER" has to fit in the SQUARE, when levers are lifted.
 o The "REVERSE-LOCK" synchronization prevents changing direction in a crank-cycle
 o Setting INPUT-NUMBERS: Have to show the right DISPLAY-NUMBERS.

... IF NOT ... Continue with  < S T A R T >  again!

< O T H E R W I S E >

Continue with the CARRIAGE, see (9):
 o Try to lift the LEVER ON BACK SIDE by HAND (!) when turning the LONG GEAR:
   There is a position were it could be lifted - otherwise it is blocked ... 
   !!! MARK [+Limit] & [-Limit] on AXLE (w."TippEx") and SET-IT in CENTER !!!

[*]    ... DETAIL:  
 
   When in CLEARING COUNTER-UNIT the LEVER get lifted, it lift with it the
   LOWER STRUCTURE in (8a) to RESET the COUNTER-DIRECTION-Finger.

FINISH THE ODHNER-239  T E M P O R A R Y ...
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See (10)&(11): Press the FRONT-LEVER with the left hand and "thread-in" the
CARRIAGE from the right side. The carriage MAY STOP, touching tooth of LONG-GEAR
and LEFT GEAR of the body, see (4). TAKE A NEEDLE and make the long-gears pass!
Bring the carriage to the midle. Flip the calculator upside down. Insert the
CARRIAGE LIMITER, screw it. Flip the calculator upside again.  T E S T   I T  !!!

... WHEN TESTS SUCCESSFUL:
FIX the LEFT & RIGHT BEARINGS. Remove the CARRIAGE LIMITER, REMOVE the CARRIAGE.

THE  F I N A L  ASSEMBLING OF THE ODHNER-239 ...
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... REMOVE the temporary placed 4 FEET ...

See (12): PLACE & SCREW all COVER-PIECES in reverse order ...
CONTINUE at  < O T H E R W I S E >  ...  until  all  T E S T S  are  OK!

impressum:
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© C.HAMANN               http://public.BHT-Berlin.de/hamann             [*] 06/13/16