Timex M105 Movement — Service Manual & Teardown

A Calendar on the Model 104

The Timex Model 105 is a 13 ligne calendar movement utilizing the basic construction of the Model 104. Like the Model 104 it features the “V-Conic” bearing system and two plate design. The calendar mechanism is housed between the dial plate and the dial, and the design includes a fast date advance feature.

To clean the Model 105 it is necessary to remove only the hands, dial, date ring, date frame assembly and the balance wheel assembly.

Note: The movement underneath is the Model 104 and this manual does not repeat its servicing. For cleaning, lubrication and the base reassembly, see the Model 104 guide. The Timex code number on the edge of the dial gives the catalog number, movement number and year of manufacture.

Timex Model 105, movement side — Dial side

Exploded View

Everything below the numbered parts is the basic Model 104 movement.

Disassembly for Cleaning

Getting the movement out of its case first? Case types and dust seals

Releasing the Crown and Stem

A

Remove the case back and support ring. This is not always used.

B

Loosen the screw on the set lever, beside the stem, to release the crown and stem assembly, then pull it out of the movement and the case.

The set lever, set lever screw and crown and stem assembly

Fig. 105.3 · Figure 3, Set Lever

Out of the Case

C

Turn the assembly over and remove the crystal using a crystal remover. The reflector ring and the movement and dial assembly can then be removed through the front of the bezel. Some designs permit removal of the movement and dial assembly through the back of the case.

The crystal, reflector ring, movement and dial assembly, and bezel

Fig. 105.3 · Figure 4, Case

The Dial Tabs

•

Four dial tabs pass through the holes in the date frame. Straighten them so they will clear the holes.

Fig. 105.4 · Dial Tabs

Lifting Off the Calendar

D

Remove all hands.

E

Straighten the dial tabs so they will pass through the holes in the date frame. Hold the dial in position, turn the assembly over and then lift off the dial. Note the position of parts under the dial.

F

Lift off the date ring, then the date frame assembly, noting the location of the bosses on the bottom, and remove the date detent spring from the date frame assembly.

G

Remove the hour wheel washer, the hour wheel assembly and the cannon pinion assembly.

Note: With the above parts removed, the basic movement may be replaced with a Timex reconditioned movement. The parts removed are then assembled to the reconditioned movement.

The Model 105 calendar stack lifted off the basic movement

Fig. 105.4 · Calendar Stack

Reassembly

The Date Detent Spring

A

Insert the date detent spring into the date frame assembly as shown.

B

Lubricate the bearing face of the date detent spring with a thin film of non-spreading watch oil, Moebius Synt-A-Lube in the factory, where shown.

Caution: Avoid excess lubrication, and do NOT lubricate the date wheel area.

Oiling the bearing face of the date detent spring

Fig. 105.5 · Date Detent Spring

The Cannon Pinion

•

Apply non-spreading watch oil to the end of the cannon pinion.

Fig. 105.5 · Cannon Pinion

Replace the parts on the movement in this order: cannon pinion assembly, hour wheel assembly, hour wheel washer, then the date frame assembly, orienting the frame with the slot at the stem and seating the bosses in the holes.

Position the date ring centrally on the date frame assembly. With fine tweezers, deflect the date detent spring inward until the date ring drops into place. Orient the dial with the window toward the crown and stem assembly and insert the dial tabs through the holes in the date frame assembly. Hold the dial and date frame assembly in position on the movement, turn the assembly over and bend the tabs firmly over the edge of the dial plate.

TheModel 105