contact_me   index   photographs   equipment   photography   darkroom   links
These links take you to various articles relating to using press cameras

Cleaning, Lubricating and Adjusting the
No. 2 Graphex Shutter

Adapted from the factory service manual dated 1957
by Tom Rittenhouse 1/15/2004

NOTE: Bold italics are notes and additions by Tom.

 

 

Cleaning Disassembled Parts

Clean disassembled parts of lens and shutter assemblies as follows:

a. Clean unpainted metal mechanical parts with chlorothene. Dry the cleaned parts thoroughly: use a clean lint-free cloth or a gentle blast of compressed air. When cleaning parts of shutter assembly, such as levers and gears, use a small bush moistened with cleaning compound to clean parts thoroughly.

b. Wipe painted metal parts, and non-metallic parts, with a soft lint-free cloth moistened with cleaning compound. Thoroughly dry cleaned parts with a clean, dry, lint-free cloth.

c. Give special attention to contacting surfaces of contact assemblies (2 and 3, fig. 18, or 2 and 3, fig. 25). If surfaces are tarnished polish them until they are clean and bright.

d. Inspect and replace parts that show excessive wear or are damaged.

(I used Ronsonol --lighter fluid-- as my cleaning agent. Cheap and easy to find. Just be aware that it is highly flammable. I also used a fiberglass contact cleaning pen to remove all signs of corrosion.)

ABSOLUTE WARNING: Soaking the shutter in cleaning fluid such as Ronsonol without disassembling it removes the grease and leaves the grit. Also this shutter has paper insulators in the sync circuits that can be desolve by a prolonged soak. Soaking is a sure way to destroy a shutter quickly. You don't want to do that to a shutter you are going to keep. And if you would do that to one you are going to sell, well...

 

Lubrication

All parts of the shutters that require lubrication are indicated on exploded view illustrations and specified in paragraphs concerning shutter assembly instructions. Where Lubricating Oil, General Purpose (LO) is specified, apply one drop with a small wire and wipe the oiled surface with a lint-free cloth. Use a small brush to apply Grease, Aircraft and Instrument (GL).

CAUTION: Excessive or incorrect lubrication or use of lubricants other than those specified. could cause malfunction within the shutter mechanism. Avoid getting any lubricant in lenses, shutter blades, or diaphragm leaves.

(I use watch oil and white lithium grease. Modern synthetics might be better. You need to avoid over-lubricating things. One drop of oil, and a bit of grease about he size of a paper matchhead is more than enough to do a shutter. I use a micro-brush to dab oil, and a small brush to dab grease, then wipe the excess off with a lint free paper towel. If you can see the lube you used too much.)

 

 

SHUTTER DISASSEMBLY

1. Case Disassembly - Stage 1 (fig. 14)

a. Release shutter.

b. Remove rear and front lens elements (1 and 2) by unscrewing each in a counterclockwise direction.

Set f-stop to f8, this puts the indicator over a notch in the case that makes it easier to remove the speed cam. I can not imagine why they do do not mention this in the manual.

c. Remove nameplate locking ring (3) by unscrewing ring in a counterclockwise direction.

Remove nameplate (4).

Remove speed cam (5).

d. Remove high speed spring (6).

(Also remove pallet fork and pallet wheel from synchronizer as these are lose and will fall out when you turn the case over in step f. Also you might want to remove the contact lever spring so it will not be damaged --experience talking here)

e. From side of the shutter case, remove dust shield screw (7) and dust shield (8).

f. From back of shutter, unscrew locating pin (9). (I see no reason to remove this)

 

2. Synchronizer Removal - Stage 2 (fig. 15)

a. Remove two contact screws (1), contact assembly "A" and contact assembly "B" (3).

b. Unscrew two prongs (4). Remove two prong screws (5) by placing their ends against a flat surface and forcing them out through holes in shutter case. Remove insulator block (6) and two prong insulators (7).

c. Unhook end of delay and lock lever spring (8) from delay lever (10). Remove delay lever screw (9) with delay and lock lever spring attached. Remove delay lever (10).

d. Set synchronizer Indicator lever to black "M". Unhook clutch lever spring from clutch lever. (Not Applicable on the shutter I have)

Remove three synchronizer support screws (11) and carefully remove synchronizer assembly (12). (The screw under the zero lever will not come out of the hole until the zero lever is removed in Stage 3)

 

3. Synchronizer Disassembly - Stage 3 (fig. 16)

(One can leave this Stage until before reassembling the synchronizer assembly --Reassembly Stage 4-- if one wishes as long as you have removed the parts mentioned in Stage 1, step d)

a. Remove clutch lever screw (2) with clutch lever spring (1) attached. Remove clutch lever (3).

b. Remove sector gear spring (4) from sector gear screw (18).

Remove synchronizer pallet (5) and synchronizer escapement wheel assembly (6).

c. Remove two actuator lever screws (7) and actuator lever (8). (My shutter does not seem to have this part, unless they mean the contact block mounted on the mode lever)

Remove zero lever screw (9) and zero lever assembly (10) (Now you can remove the 3rd mounting screw).

Remove lock lever screw (11) and lock lever (12).

d. Remove two millisecond scale screws (13) (on underside of synchronizer subassembly) and millisecond scale (14) from synchronizer subassembly (15).

e. No further disassembly of the synchronizer subassembly (15) should be performed except for replacement of contact lever spring (16), contact lever screw (17) and sector gear screw (18). (All of these need to be removed for proper lubrication, so disregard e and do the following:)

Remove contact lever screw (17) and contact lever (I recommended removing the spring (16) earlier).

Remove sector gear screw (18) and sector gear.

 

4. Main Disassembly - Stage 4 (fig. 17)

a. Remove retarding weight screw (2) with retarding weight spring (1) attached.

Remove retarding weight assembly (3).

b. Unhook bulb lever spring from the bulb lever (6).

Unhook bulb and pallet lever spring (4) from bulb lever (6) and remove spring.

c. Unhook release and time lever spring (25) from time lever (7).

Unscrew bulb and time lever screw (5). Remove bulb lever (6) and time lever (1).

d. Remove zero lever spring screw (9) with zero lever spring (8) attached.

e. Remove auxiliary spring (12), main lever screw (13) main lever spring 14) and main lever assembly (15).

f. Remove cocking lever screw (17) with cocking lever spring (16) attached, cocking lever assembly (18) and cocking lever washer (19).

g. Unscrew focus lever button (20) and remove focus lever spring (21).

h. Remove one focus lever screw (22), and focus lever (23).

i. Remove release lever screw (24), release and time lever spring (25) and, release lever assembly (26).

 

5. Retarder Disassembly - Stage 5 (fig. 18)

a. Remove blade lever spring screw (1) and blade lever spring (2). Remove blade lever screw (3) and blade lever (4).

b. Remove pallet lever spring (5), and bulb lever spring (6).

c. Remove one (large) retarding device cover screw (7), two (small) retarding device cover screws 8) and retarding device cover (9).

d. Remove retarding lever screw (10), and retarding lever assembly (11) with retarding lever spring 112) attached.

Remove retarding wheel assembly (13), escapement wheel assembly (14), center wheel assembly (15), pallet (16), pallet lever assembly (17), and cable release lever assembly (18).

e. Remove cable release socket screw (19) and cable release socket (20).

f. Remove three (long) support plate screws (21), four short) support plate screws (22) and support plate assembly (23).

 

6. Blade Disassembly - Stage 6 (fig. 19)

a. Remove blade separator washer (1) five shutter blade assemblies (2) and revolving ring assembly (3).

b. Remove three diaphragm plate screws (4), and diaphragm plate and leaf assembly (5).

c. Remove ten diaphragm leaves (6) only if the need replacing.

d. Remove diaphragm indicator ring (7) from shutter case.

 

 

SHUTTER REASSEMBLY

1. Blade Assembly - Stage 1 (Fig. 19)

a. Apply a thin film of grease (GL) to underside raised portion of diaphragm indicator ring (7), before reassembling into case (8). Do not allow grease to contact recessed surface.

Move indicator rind back and forth to distribute grease evenly.

Move diaphragm indicator ring to its extreme clockwise position.

CAUTION: Be sure there is no grease on top surface of diaphragm indicator ring.

b. If diaphragm plate and leaf assembly (5) has been previously disassembled, reassemble by staking ten diaphragm leaves (6), one by one, in a counterclockwise direction.

The starting point is not critical.

Each successive leaf will lie on top of the proceeding one.

c. Before reassembling diaphragm plate and leaf assembly (5) into the case subassembly, insert a pencil in diaphragm opening, and with a circular motion, carefully move diaphragm leaves until they open to full aperture.

Position guide hole of each diaphragm leaf for mating with slots in the diaphragm indicator ring by inserting an awl into pivot hole of each diaphragm leaf.

Insert the diaphragm plate and leaf assembly into the shutter case with the diaphragm leaves facing down.

Orient the diaphragm plate and leaf assembly so that the embossed hole "A" opposite me enbossed hole "B" locates over the hole in the shutter case nearest the pointer on the diaphragm indicator ring.

Apply slight pressure on diaphragm plate and leaf assembly and slowly move diaphragm indicator ring counterclockwise until it clicks into alignment with the diaphragm leaves.

Check diaphragm leaves for smooth closing and opening action before assembling the three diaphragm plate screws (4) into countersunk holes.

d. Open the diaphragm to its widest aperture.

Assemble revolving ring assembly (3) in track on the diaphragm plate and leaf assembly so that long stud revolving ring locates opposite the slot closest to the pointer on the diaphragm indicator ring.

Using tweezers, lay five shutter blade assemblies (2) successively into position, starting with the first blade assembly on long stud on the revolving ring assembly and working counterclockwise.

Be sure that stud on each blade assembly seats into its slot on the diaphragm plate and leaf assembly.

Place blade separator washer (1) on the mounting stud of the last blade assembled.

Keep shutter blades in the open position.

 

2. Retarder Assembly - Stage 2 (Fig. 18)

a. Locate support plate assembly (23) over shutter leaves so that long stud on revolving ring assembly locates into slot "A" and countersunk holes in support plate assembly are aligned with holes in diaphragm plate and leaf assembly.

Secure support plate assembly with four short support plate screws (22) through the inner holes and three long support plate screws (21) through outer holes.

Seat all screws below surface of the support plate assembly (23).

b. insert cable release socket (20) and secure with cable release socket screw (19).

c. Place cable release lever assembly (18) on its mounting stud. (Make sure the lever is aligned with the center of the cable release socket or a thin cable release may push past it)

Oil (LO) stud on pallet lever assembly (17).

Mount pallet lever assembly on its mounting stud.

Place the pallet (16) over stud on lever assembly,

d. Oil center wheel assembly (15) by touching each end of pinion to a felt pad moistened with oil (LO).

Insert short end of the pinion into center hole in the support plate assembly (23).

Oil the escapement wheel assembly (14) in the same manner and insert into its mounting hole with pinion teeth facing down.

Oil retarding wheel assembly (13) in the same manner and insert into its mounting hole with the pin facing up.

Align retarding device cover (9) to posts of support plate assembly, being careful not to disturb gear train.

Secure retarding device cover in place with large retarding device cover screw (7) in outer hole and two small retarding device cover screws (8) in inner holes.

Hold pallet out if engagement and spin retarding wheel assembly to check gear train for smooth operation.

e. Assemble retarding lever spring (12) on retarding lever assembly (11) with long end of spring facing down and located between bearing and lug.

Apply oil (LO) to inside bearing surface retarding lever assembly.

Rotate retarding wheel assembly (13) so that its pin is located opposite the cable release socket screw.

Place retarding lever with retarding lever spring attached, over its mounting stud on support plate assembly.

Locate short end of retarding lever spring against the inside wall of the shutter case (refer to fig. 21) and engage the pin on the retarding wheel assembly in slot of the retarding lever assembly.

Secure retarding lever with retarding lever screw (10).

Check gear train for smooth operation.

f. Assemble bulb lever spring (6) over retarding device cover screw (8) with long end of spring up. Hook-up of spring will be dun at stage 3. (There is no bulb lever spring, and the cover screw does not have a stud to mount it on my shutter)

Assemb1e pallet lever spring (5) on its mounting stud with short end of the spring up and located in slot in shutter case.

Wind long end of spring counterclockwise and locate behind pallet lever stud. (Refer to fig. 21.)

g. Assemble blade lever (4) so that long pin on revolving ring assembly locates in slot on blade lever.

Secure blade lever in place with blade lever screw (3).

Position blade lever spring (2) with long end of spring located in notch on blade lever.

Secure blade lever with blade Lever spring screw (1).

Be careful not to bend spring when tightening screw.

Check shutter blade operation by pushing blade lever with a screwdriver to check spring tension. Proper tension will cause shutter blades to snap open.

 

3. Main Assembly -- Stage 3 (fig. 17)

a. Grease (GL) inside bearing surface of release lever assembly (26) and place it on its mounting stud.

Assemble release and time lever spring (25) on release lever assembly with short end of spring down and located between bearing and handle of release lever assembly.

Wind the long end of release lever spring clockwise and temporarily locate it against the pallet lever stud.

Hook-up of spring will be done later in this stage.

b. Insert focus lever (23) through slot in side of shutter case.

Engage short stud on the revolving ring assembly in slot in focus lever and secure with one focus lever screw (22).

c. Apply grease (GL) to short end of the focus lever spring (21) and assemble spring, short end down, on its mounting stud.

Be sure spring locates under the collar of stud; wind short end of the spring counterclockwise and hook short end in notch on focus lever (Refer to fig. 21).

Screw focus lever button (20) in focus lever.

d. Position cocking lever washer (19) over hole in support plate assembly.

Apply a very light film of grease (GL) on bottom surface of cocking lever assembly (18), position over washer, and secure with cocking lever screw (17).

Center washer when tightening screw so that cocking lever will rotate freely when screw is tightened.

Assemble cocking lever spring (16) over cocking lever screw with long end down and located against barrel of the support plate.

Wind short end of the spring clockwise and hook to cocking lever (Refer to fig. 21).

e. Place the main lever assembly (15) on its mounting stud.

Assemble main lever spring (14) on pivot of the main lever assembly, with short end down and located in outside notch on the main lever assembly.

Wind spring one quarter turn counterclockwise and locate the long end of spring in the slot of the shutter case (Refer to fig. 21).

Secure main lever assembly with main lever screw (13).

Apply a light film of grease (GL) to surface of the main lever assembly on which the cocking lever assembly travels.

Grease (GL) short end of auxiliary spring (12) and assemble it on its mounting stud with long end down and located against the shutter case.

Wind the short end of spring counterclockwise and locate it in notch on lug of main lever (Refer to Fig. 21).

 

At this point Test shutter action as follows:

(1) With the shutter released, hold retarding lever assembly up against cable release socket.

(2) Clearance between the small lug on the main lever assembly and face of the retarding lever assembly at position "A" (refer to Fig. 22C) should be between .005 and .010 inch.

(3) still holding retarding lever assembly against cable release socket, move cocking lever slowly until main lever is at position "B" (refer to fig. 22B)at this point main lever should just clear face of the retarding lever.

(4) Cock and release shutter, observing for full retarding action. Shutter should remain open for one second.

(5) With shutter released, a slight clearance should be maintained between blade lever hook of the main lever assembly and the revolving ring assembly stud (Refer to fig. 22A). File hook slightly if necessary.

(6) The releasing arm of main lever assembly should just clear blade lever and hook solidly on releasing hook on the release lever assembly when shutter is cocked (Refer to fig. 22A). If releasing arm is too high, bend main lever at point "B" to achieve correct engagement with the releasing hook.

f. Position stop lever (11) on main lever and secure with stop lever screw (10). Assemble zero lever spring (8) over stop lever screw, locating short end down and against stop lever lug. Hook-up of the zero lever spring will be done in stage 5.

g. Assemble time lever (7) and bulb lever (6) over hole in retarding device cover and secure in place with bulb and time lever screw (5).

h. Wind long end of release and time lever spring (25) clockwise and locate in notch on time lever lug (Refer to fig. 21).

i. Assemble bulb and pallet lever spring (4) on its mounting stud, short end down and located against pallet lever stud. Wind long end of spring clockwise and locate it in notch on lug of bulb lever (Refer to fig. 21).

j. Assemble retarding weight assembly (3) on its mounting stud. Assemble retarding weight spring (1), long end up, on the retarding weight screw.

Thread the retarding weight screw partway into retarding weight mounting stud. Locate short end of spring in groove of retarding weight assembly and long end of spring into slot in shutter case (Refer to fig. 21).

Tighten screw. The weight assembly should move freely.

 

4. Synchronizer Assembly - Stage 4 (fig. 16)

a. Replace sector gear, and sector gear screw (18.

Apply oil (LO) in recess in the sector gear bearing.

b. Replace contact lever, contact lever screw (17), and contact lever spring (16), if previously removed from synchronizer subassembly (15).

The contact lever spring is assembled over the screw with short end of spring down. Hook short end of spring over lug on contact lever and wind long end clockwise to rest against small stud on sector gear (Refer to fig. 21).

c. Assemble millisecond scale (14) and secure with two millisecond scale screws (13). (Tiniest screws)

d. Apply grease (GL) to friction surfaces of lock lever (12) and secure with lock lever screw (11).

e. Assemble the zero lever assembly (10) and secure with zero lever screw (9). (Place hold down screw in hole first)

f. Apply grease (GL) to friction surfaces of actuator lever (8); assemble actuator lever and secure with two actuator lever screws (7). (Once again not applicable on my shutter, unless they mean the contact block)

g. Oil (LO) bearing holes of synchronizer escapement wheel assembly (6) and synchronizer pallet fork (5); Assemble each to their respective mounting studs. (I recommend waiting until just before closing case for this as there is nothing holding them in place)

h. Assemble sector gear spring (4) over sector gear screw (18), long end down. Spring will be positioned in stage 5.

Assemble the clutch lever (3) and secure with we clutch lever screw (2).

Assemble the clutch lever spring (1) over the clutch lever screw.

Hook-up of the clutch lever spring will be done in Stage 5.

 

5. Synchronizer Installation -- Stage 5 (fig. 15)

a. Set synchronizer indicator lever to black "M" position.

b. Rotate sector gear counterclockwise to clear slot in synchronizer support plate.

Slide synchronizer assembly (12) so that stud, on main lever locates in slot in synchronizer support plate and the synchronizer assembly locates on its mounting studs.

Secure synchronizer assembly with three synchronizer support screws (11).

c. Hook long end of the clutch lever spring in notch on clutch lever (Refer to fig. 21).

d. Locate the long end of the sector gear spring (4, fig. 16) against barrel of support plate: wind short end of spring clockwise and locate it behind large sector gear stud (Refer to fig. 21).

e. Locate short end of zero lever spring (8, fig. 17) in notch on stop lever; wind long end counterclockwise and locate it in notch on zero lever. (Refer to fig. 21).

f. Apply grease (GL) to underside friction surface and to top recess of delay lever (10); assemble delay lever and secure in place with delay lever screw (9).

Assemble delay and lock lever spring (8) over the delay lever screw with short end of spring down. Hook short end of spring on lug at lock lever, Wind long end clockwise and locate it against lug on the delay lever (Refer to fig. 21).

g. Insert two prong insulators (7) into shutter case. Assemble insulator block (6).

Insert two prong screws (5) through insulator block and assemble two prongs (4), making sure head of each contact screw locates flat w shutter case.

h. Locate contact assembly "B" (3) over left prong screw and secure in place with contact screw (1).

The contact assembly "B" should lie tight against, and just below, top surface of millisecond scale.

Locate the contact assembly "A" (2) over right prong screw and secure in place with contact screw (1). Contacts should have full surface contact when closed. If necessary bend contact assembly "A" that its insulator bears lightly against the actuator lever. When shutter is operated, good electrical contact between "A" and "B" contact assemblies is necessary when the contact lever is set on the black "M", red "M", or "F-X" positions.

 

6. Final Assembly - Stage 6 (fig. 14)

a. Screw locating pin (9) into rear of shutter.

b. Assemble dust shield (8) and secure with dust shield screw (7).

c. Grease (GL) long end of high speed spring (6) and place it on its mounting stud with short end of spring facing down and located against lug on the main lever (Refer to fig. 21.)

d. Rotate diaphragm indicator ring to mid-position. Grease (GL) inside edges of cam slots on speed cam assembly (5).

Assemble speed cam assembly so that high speed spring mounting stud locates in inner slot.

Apply slight pressure and rotate speed cam assembly back and forth until it seats in place.

e. Apply grease (GL) to back surface of nameplate (4). Assemble nameplate so that the high speed spring mounting stud locates in small hole on nameplate.

Assemble and tighten nameplate locking ring (3) by screwing clockwise.

CAUTION: Avoid over-tightening the locking ring to avoid binding components in internal mechanism.

f. Screw front and rear lens elements (2 and 1) clockwise into the shutter.

g. Test shutter as per Section IV:

First Page, Section IV

Second Page, Section IV

Third Page, Section IV

 

Adjusting Shutter Speeds

Incorrect shutter speeds fall into two categories. Speeds may be either fast or slow throughout the full range of settings; or one or more (but less than all) speeds may be fast or slow.

a. The first condition can be corrected by increasing or decreasing tension on the main lever spring (fig. 17).

b. The second condition can be corrected by swaging or filing speed cam assembly (fig. 14), at its point of contact with the retarding lever assembly fig. 18). Swaging will decrease travel of retarding lever assembly and increase shutter speed.

To increase a given shutter speed, first determine the point at which the retarding lever contacts the cam face with shutter set at that speed. Place speed cam on an anvil and strike a dull chisel with its end placed 1/32 of an inch from that point.

Filing will increase travel of retarding lever assembly and decrease shutter speed. File cam face at the point which contacts the retarding lever assembly when shutter is set at speed to be adjusted.