
Posted: Tue Feb 21, 2006 5:17 am
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| If I'm reading it right, the triangular thing is a stop and the metal ribbon should slide in and out freely as the focus is racked in or out. That metal ribbon is badly bent and is beyond the point where it could be straightened. Are replacement ribbons available and is it difficult to replace? |
With bed open to 90<sup>0</sup> and front standard facing you the rangefinder tube will end at the lower right corner of the body. A piece of thin spring steel approximately 8mm wide is permanently attached to the end plunger of the tube. I call it permanent as I have no clue as to how to remove it, have had the pin break on one, seems to be pressure fit into plunger, ground out with a dremel and diamond cutter, reinstalled same ribbion with a piece of straight pin to connect it. This strip of spring steel rides against a triangular arm attached to the rail with two screws. The ribbion of spring steel rides in a track formed as a part of the bed block for that side.
Loosen the two rear most bed block screws and the one at the end of the arm that forms the track for the ribbion to slide in one to two turns.
Run the rails out and in and observe the ribbion, does it move in and out freely? Yes, carefully retighten the three screws and check operation.
No, Remove rangefinder tube which will require removal of the bellows to access the mount clamps and screws. On the Cam end of the rangefinder tube carefully decrimp the tube end and remove cam tension spring, spring punger, cam plunger, spacers and balls. Clean all parts and tube and reassemble. Ribbon mounted to plunger, ball spacer, ball, spacer....until all are used and spacer, cam plunger, then spring plunger and spring, and recrimp the end of the tube. Streaching the spring will increase the tension but will not solve draging tube parts or misaligned track on the bed.
Some recomend not using any luberication on the inside of the tube but drag will result. More than a trace amount of lubericant on the tube inside or parts will cause drag also. Extra fine graphite may work. The ribbon spring steel being bent at the bed close fold will not degrade the operation of the rangefinder signifantly in my opinion.
I have two, both I have to help the ribbion out with my finger, 25% of drag is due to bed fold and 75% is due to the guide block track, wish I had some rub/brush on teflon or simular lubericant. I wiped all parts of the rangefinder tube with a extremely thin layer of white lithium grease before reassambleing. All parts and cam move freely out of the camera, the rangefinder tube has a little adjustment room in the body and it does affect operation. Tube must be reinstalled so that bed will close properly with focus fully retracted.
Bellows Removal:
1.Remove focus panel from back.
2.Rotate back to 45<sup>0</sup>.
3.Using a small screwdriver remove the six retainer clips that hold the bellows to the back. Indented spots go to the outside on reassembly. There are two clips on the top and bottom and one each on the sides. Adjust back orentiation to improve access to the clips.
4.Remove lower rear mount bracket screw on the right side handle bracket as determined by holding the camera at shooting position.
Hold terminal strip retaining nut while turning this screw.
5.Remove the terminal strip cover and disconnect the three wires to the bellows only. Use needle nose pliers to pull the wire terminals off without damaging them or the wires. Note which wire comes off which terminal. Older cameras have a color tab close to the terminal on all black wires, newer cameras have red, white, and yellow wires in a black housing.
6.Slide front standard and bellows assembly out of camera and off end of rails.
7.Installation is reverse of disassembly.
Make notes on which rangefinder clamp and what washers or spacers are on each clamp and remove them then remove the tube assembly. Installation is reverse of removal.
See this post:
http://www.graflex.org/helpboard/viewtopic.php?topic=3962&forum=1&5 for the adjustment procedure for the actuator.
Charles