Pentax MX Frame Counter Disassembly

Remove the lever cap. The cap is reverse threaded.

Lift off the advance lever.

Remove the collar beneath the lever.

Set the ISO to 100 and the shutter speed to 1000.

Remove one pin head screw.

Lift off shutter speed dial.

Remove the collar beneath the dial.

Installation Notes: Make sure that the tab on the shutter speed resistor mates properly with this slot on the shutter speed dial.

Place a tool in the fork of the rewind shaft. Turn the rewind knob counterclockwise to loosen it.

Remove the lock ring underneath the rewind knob.

Remove the cover plate.

Remove two M1.7 x 3.2 mm screws.

Remove two M1.7 x 2 mm countersunk screws.

Lift off top cover.

The release cable pin in the shutter button is loose and may fall out.

Temporarily replace the wind lever and move it into the stowed position.

Remove one M1.7 x 2.4 mm countersunk screw.

Remove one M1.7 x 3.8 mm screw.

Remove one M1.4 slotted nut.

Lift off frame counter mechanism.

Align the post on the ratcheting gear with the slot in the top wind gear.

The frame counter gears will also need to mesh when installed.

Check the placement of this spring. It often comes loose.