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Service Manual · Heritage 1854

The
Model 41

9¾ by 12¾ Ligne Electric Calendar · Model 40 Base

The Model 40 with a calendar mechanism added. A finger on the date wheel moves the date ring, a detent spring holds it and helps carry it, and the date can be set by hand in either direction.

Electric Calendar Model 40 Base Set Either Way
The Model 41 movement, dial side and movement side
Factory Service Manual · Model 41 · Dial Side & Movement Side
Technical Specifications
Ligne9¾ by 12¾
Dimensions22.1 by 28.70 mm
Basic movementModel 40
TypeElectric calendar
Date settingManually, forward or backward
ManualService Manual · Model 41
Height6.20 mm
Jewels3
Height and jewels: ranfft.org

A Calendar on the Model 40

The Timex Model 41 is a 9¾ x 12¾ ligne electric calendar movement. The Model 41 movement is the same as the Model 40 movement except that a calendar mechanism has been added. The date can be set manually, either forward or backward, by rotating the hands.

The one difference in servicing: Basic servicing techniques are the same as for the Model 40, except that the minute hand should be removed prior to removing the dial. For the electric movement itself, its contact system, its train and its cleaning, see the Model 40 guide.
Caution: Since the watch contains permanent magnets, no attempt should be made to demagnetize it.
Timex Model 41, dial side
Dial side
Timex Model 41, movement side
Movement side
Photos courtesy of ranfft.org

Exploded View

The case back on the Model 40 and 41 Electrics comes off in its own way. Case back removal

Everything below the numbered parts is the Model 40 electric movement.

Model 41 movement, exploded view
Model 41 · Calendar Parts
Ref.Component
145Dial Rest
206Center Wheel Assembly
498/1Hour Wheel Washer
751Dial
850Hour Hand
851Minute Hand
852/1Sweep Second Hand
2556Date Wheel Assembly
2557/1Date Ring
2558Hour Wheel
2576Detent Spring

The Date Mechanism

How It Drives

•

A finger attached to the date wheel assembly engages with and moves the date ring.

•

A detent spring holds the date ring in position and also aids in moving the date ring.

•

A pinion attached to the hour wheel, 2558 on the exploded view, engages with the date wheel assembly.

Note: Use the exploded view as a guide in disassembly and assembly of the mechanism.
The detent spring, dial rest, date ring, date wheel assembly and center wheel assembly
Fig. 41.3 · Date Mechanism

Cleaning & Lubrication

Dial rest, July 1976: the same spreading type lubricant used on the Model 254 (Woods AAAA oil) may be applied to dial rests which have solid film lubricant, between 3 and 6 o’clock on the inside corner. Service Bulletin No. 112
Lubricant change, June 1974: Timex Service Bulletin No. 111 replaced the factory oil for this model. Moebius Synt-A-Lube oil is used instead of Elgin M56B oil. (It supersedes Bulletin No. 108.)

All cleaning and lubricating points indicated for the Model 40 should be followed for the Model 41. In addition to the Model 40 lubricating points, lubricate a few teeth on the date ring and the post of the date wheel. The dial rest has been coated with a solid lubricant and needs no further lubrication.

The date ring is a printed dial: remember that the date ring actually is a printed dial, and some watch cleaning fluids will strip the printing.

Positioning the Hands

1

First: set the finger on the date wheel assembly against the date ring as shown in the figure above.

2

Next: replace the dial assembly together with the hour hand, keeping the hour hand set at the 2 o’clock position.

3

Finally: replace the minute hand and sweep hand.

Reflector rings: the Model 41 shares its reflector rings with the Model 40, and the flat, serrated and cup styles are not interchangeable. See Reflector Rings on the Model 40 guide.

Parts