Hello... just purchased this amazing truck, a 1974 international harvest pickup. Looking to fix a few things..such as the ignition key switch. All was working well until the cold weather arrived now my key ignition switch area just roles and my truck want start. Show I just replace complete ignition switch or parts.Q
this is a key on the column type of ignition switch.. right..not a key on the dash board.....straight or tilt column ???this is the next model newer in tilt columns.. it comes apart in a similar fashion to the earlier version that you might have.. http://www.carcraft.com/techarticles/ccrp_0908_gm_steering_column_repair/viewall.htmlin photo 14 in the above article.. you can see the actuator gear rack as a grey ridged thing.. a curved metal wire spring into the side of the black gear.. either your gear rack or the plastic gear is broken.. allowing the lock to rotate without actuating the ignition switch.. how it all works..when you turn your ignition lock cylinder.. it rotates a shaft with flatted ends.this shaft sticks thru the plastic gear.. the plastic gear rotates against the gear rack to change a rotational motion to a linear motion.. this either pushes or pulls the rod that goes down to the ignition switch on the top of the column housing under the dashboard.. if you have a NON TILT Column.. you will need a steering wheel puller.. and a lock plate depressor to get it apart.. along with a #3 phillips to unscrew the 3 screws that hold the lock housing to the inner housing.. there is another option.. climb under the hood and disconnect the steering coupling.. disconnect the shift linkage from the column if its an automatic on the column..get under the dash and remove the plate from the firewall where the column goes thru.you now have a pair of 9/16 hex nuts to remove and drop the column.. again. a warning.. if you have a column shift.. there may be a small string device that's clipped or screwed to the column tube just below the shifter lever.. this has to be disconnected or it will break the string or the indicator in the dash.. 73 up chevy truck owners pay attention.. it will destroy your dash board.. there are a few electrical connectors to remove.. and the whole steering column comes out.. this takes about 20 minutes to perform.. you are now free to work on the column on the bench.. or take it to the mechanic or steering column repair shop to get it repaired..if you have a tilt column.. and the rack is broken.. you will need to be able to extract the tilt pins also.. there are several companies who have videos online on how to tear down the columns.. most of the parts below the steering wheel.. can be purchased at most gm dealerships..
here is another article on the slightly earlier totally round column .. it does not show as much detail.. but it might also help.http://www.carcraft.com/howto/56459/if you have a straight column.. non tilt.. you will need thisDorman/Rack and Sector Gear KitPart Number: 83221 or for tilt column you need a dorman 83211... there are LOTS of parts to come apart.. these are NOT impossble to ***i have talked a barely mechanical friend thru a tear down on the phone..what you might also want to think about is replacing the ignition switch while you have it all apart.. its much easier and they do wear out.. the internal contacts wear away and deform.. leaving you with an ODD start and stall issue.. where the engine will run if you hold the key in the cranking position. but die when you release it back to the run position.