Service Manual · Heritage 1854

The Model 109

13 Ligne Self-Wind Day & Date · Model 104 Base

The top of the 104 family. A 13 ligne self-winding day and date movement with a fast change feature for setting both, using the day and date mechanism of the Model 106 over the self-winding work of the Model 107.

Self-winding Day & Date V-Conic Fast Change

Model 109 movement, dial side and movement side

Model 109 · Dial Side & Movement Side

Ligne13

BearingsV-Conic

WindingPlanetary gear, self-wind

Basic movementModel 104

Day & date mechanismAs Model 106

ManualService Manual · Model 109

Size (mm)29.45 mm

Height6.40 mm

Jewels0

EscapementPin lever

Beat rate18,000 bph

Power reserve38 h

Size in mm, height, jewels, escapement, beat rate and power reserve: ranfft.org

Day, Date and Self-Wind

The Model 109 movement is a 13 ligne self-wind day and date movement which contains a fast change feature for setting both the day and the date. It contains a planetary gear winding system to keep the mainspring wound, and the routine motion of a normally active person is sufficient to keep the watch running without manual winding.

Note: The day and date mechanism is similar to the Model 106, and the basic movement is cleaned and relubricated as outlined for the Model 104.

Timex Model 109, movement side — Dial side

Exploded View

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

Model 109 · Exploded View

0032Dial

1004Cannon Pinion Assembly

1011Hour Wheel Assembly

1035Screw

1041Hour Wheel Washer

1100Date Ring

1163Ratchet Wheel

1171Hour Hand

1172Minute Hand

1184Sweep Second Hand

1186Day Detent Spring

1190Rotor Plate Assembly

1192Rotor Plate Screw

1429Date Detent Spring

1500Day / Date Frame Assembly

1707Day Disc

Disassembly for Cleaning

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

1 · Freeing the Rotor Assembly

Remove the case back. Loosen and remove the two rotor plate screws.

Lift the rotor assembly slightly to free the dowels.

Fig. 109.3 · Figure 1

2 · Sliding It Out

The rocker arm fits between the rotor frame and the rotor assembly. Position the rotor weight as shown and slide the assembly along the movement plate, toward the balance wheel, until it is free of the rocker arm, then lift the assembly out of the case.

Caution: Any attempt to lift the weight before it is free of the rocker arm will result in damage to the movement.

The rotor positioned to clear the rocker arm

Fig. 109.3 · Figure 2

3 · Releasing the Crown and Stem

Loosen the set lever screw and raise the lever sufficiently to release the stem, then pull the crown and stem assembly free of the movement and the case.

Fig. 109.4 · Figure 3

4 · Out of the Case

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.

Crystal, reflector ring, movement and bezel

Fig. 109.4 · Figure 4

5 · The Dial Tabs

Remove all hands. Turn the assembly over and bend the four dial tabs sufficiently to free the dial from the day/date frame and the movement.

Fig. 109.5 · Figure 5

6 · Off the Day/Date Frame

Hold the dial in place and turn the assembly over so the dial is up. Carefully lift the dial off the assembly, noting the positions of the parts underneath, then lift off the day disc, the date ring, the date detent spring and the day detent spring.

Replace the crown and stem assembly in the movement and tighten the set lever screw to assure engagement. Release the mainspring power slowly by holding the crown in the fingers of one hand while the click is held out of engagement with the ratchet wheel, through the hole in the day/date frame.

Turn the assembly over, day/date frame down, and remove the screw securing the frame. Turn the assembly over again and lift off the day/date frame assembly and the ratchet wheel.

Remove the hour wheel washer (A), hour wheel assembly (B) and cannon pinion assembly (C) from the movement.

Note: With these parts removed, the basic movement may be replaced with a Timex reconditioned movement. Read the factory corrections below first.

Dial, day disc, date ring, day/date frame and dial plate

Fig. 109.5 · Figure 6

Cleaning

With the above parts removed, the movement of the Model 109 may be cleaned and relubricated as outlined for the Model 104. Other metal parts may be cleaned in the same manner as the movement.

Caution: Extreme care must be exercised in cleaning dials, hands, day discs and date rings. Solvent type cleaners will often damage the finish on these parts.

Reassembly

1 · The Detent Springs

Insert the day detent spring and the date detent spring into the day-date frame as shown.

Lubricate the bearing face of the day detent spring and the date detent spring with a thin film of non-spreading watch oil, Moebius Synt-A-Lube in the factory. Lubricate the vertical wall of the day-date frame with a thin film of non-spreading oil as well.

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

Oiling the detent springs and the vertical wall

Fig. 109.6 · Detent Springs

2 · The Cannon Pinion

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

Replace the parts on the movement in this order: cannon pinion assembly, hour wheel assembly, hour wheel washer, then the ratchet wheel, making sure it is seated and properly engaged with the click and the rocking bar assembly. Orient the day-date frame assembly with the slot at the stem and seat the bosses in the holes, hold the assembly together and turn it over so the frame is down, then insert and tighten the screw.

Fig. 109.6 · Cannon Pinion

Replace the parts in this order: cannon pinion assembly, hour wheel assembly, hour wheel washer, then the ratchet wheel, seated and engaged with the click and rocking bar. Orient the day-date frame assembly with the slot at the stem, seat the bosses in the holes, turn the assembly over so the frame is down, then insert and tighten the screw.

3 · The Day Disc

Note the protrusions on the back of the day disc. With a tweezer, deflect the day detent spring outward and place the day disc on the day-date frame assembly with any day, Monday for instance, in line with the crown and stem, then drop it into place and release the day detent spring.

Fig. 109.7 · Bottom of Day Disc

4 · The Date Ring

Position the date ring centrally on the day-date frame assembly. With a fine tweezer, deflect the date detent spring inward until the date ring drops into place.

Orient the dial with the windows toward the crown and stem assembly and insert the dial tabs through the holes in the day-date frame assembly. Hold the dial and day-date frame assembly in position on the movement, turn the assembly over and bend the tabs firmly over the edge of the dial plate. Pull the crown and stem out and rotate to turn the hands clockwise until the date changes with a snap, stop turning, and assemble the hands at the 12 o’clock position.

Fig. 109.7 · Date Ring

Orient the dial with the windows toward the crown and stem and insert the dial tabs through the holes in the day-date frame assembly. Hold the dial and frame in position, turn the assembly over and bend the tabs firmly over the edge of the dial plate. Pull the crown out and rotate the hands clockwise until the date changes with a snap, stop turning, and assemble the hands at 12 o’clock.

Checking the Change

1 · Date, Then Day

Turn the crown so the hands rotate clockwise until first the date and then the day advance and snap into position.

2 · The Day Window

Rotate the hands counterclockwise until the day moves partially out of the window then snaps back into the window. Rotate the hands clockwise until the day advances again.

3 · Around Midnight

Rotate the hands counterclockwise until they indicate 9 PM, then clockwise until the date changes with a snap. This change should occur around midnight.

4 · Twenty-Nine Hours

Continue to rotate the hands clockwise through 29 hours and both the day and the date should advance one position.

Then: remove the crown and stem, fit the movement in the bezel, insert the reflector ring, replace the crystal, refit the crown and stem and retighten the set lever screw. Slide the rotor back in under the rocker arm, notch towards the balance assembly, and secure with the two screws.

Factory Corrections

The Model 109 manual shipped with a printed correction sheet from the Material Sales Division, and it changes what you should take apart.

The third paragraph from the bottom of page 109.5, printed in blue and starting “With the above parts removed, the basic movement may be replaced with a Timex reconditioned movement”, is misplaced. It should follow immediately after the paragraph at the top of the same page which ends “and the Day Detent Spring, (see figure 6).”

The #109 reconditioned movement comes complete with the day/date frame assembly attached to the movement, with the ratchet wheel, hour wheel washer, hour wheel assembly and cannon pinion assembly included. Those parts should be removed from the customer’s movement only if you wish to clean the movement and replace it in the watch, in which case follow the reassembly instructions in paragraphs C and D on page 109.7.

Caution: Do not remove these parts if you are replacing the customer’s movement with a Timex reconditioned movement.