Dear bushleague,
May this find you well. Do you have a wagon or a sedan? I may be able to help, if you have a wagon. What follows will NOT be found in Volvo Tech Manual TP8202201, Body fittings, exterior (Section 8 ⏞-86, 88]), 700/900 1982- .
I have prepared this procedure using a set of cloth upholstered seats from a 1994 940, that I replaced with leather upholstered seats. As a result, I have a seat set, which is outside of the car.
Let us begin by setting out the terms of reference, so that you can quickly identify the items, to which I refer. 940/960 wagon back seats have a small section (on the passenger side of the car, US/Canada models; driver side of the car, UK/Japan and similar models) and a large section. The small section has a single headrest. The large section has an outer headrest (closest to the door) and an inner headrest (in the center of the car, next to the inner edge of the small section). The large section's inner headrest is part of the infant booster seat.
I presume you want to remove the outer headrests, i.e., those closest to the rear doors, rather than the headrest of the infant booster seat.
(a) using the flexible vinyl loops, release the catch for each lower seat section and rotate it upwards and forwards, so that the seating surface is against the back of the front passenger seats.
(b) using the release lever on the outer upper corner of the each seat back section, press the lever rearwards (towards the back of the car) and release the seat back. Push the seat back forwards and downwards, so that the rearward-facing surface of the seat ends up flat, and facing the roof of the car.
(c) Lift the flat, rectangular carpeted panels, immediately behind the seat sections. There is slight spring tension on them.
(d) Immediately in front of the hinge, for the flat rectangular panels noted
in (c), above, you will see a 10mm hex nut, that holds to the floor, a black plastic anchor. This anchor is attached to a galvanized metal section, that goes up into the seat back. This galvanized section is part of the mechanism, that pulls down the headrest, so that the top edge of the headrest is flush with the top of the seat back, when the seat back section is pushed forward. (If this were not done, a protruding headrest would stop the seat back section from rotating fully forward, thus preventing the creation of a flat floor in the load space).
(e) Remove this 10mm hex nut (using a 6" extension bar and a ratchet handle will speed this work). There is no spring tension on this hex nut. Remove the black plastic anchor from the stud (which stud is welded to the car's floor). Replace the hex nut on the stud (to keep the hex nut from getting lost).
(f) Gently grip the galvanized section and rotate it 45 degrees (in either direction). Pull gently on it - rearwards - until it comes free of the headrest post. With the seatback full forward, you will have room to remove the galvanized section and the plastic tube attached to it. Do not remove the wire springs from this mechanism.
(g) Set aside the galvanized section. Rotate the seat back section rearwards and so upwards, by about 45 degrees. Firmly grasp the headrest and slowly pull it out of the seat. Take the galvanized section and place it on the longer of the headrest posts. Slide it on at a 45 degree angle, and then rotate it, to lock it into position on the headrest shaft (this will keep the galvanized section from getting lost, and ensure you can replace the headrests easily, when you no longer need to the booster seats).
(h) Place the headrest units in a plastic bag, and store in a cool, dry place. This will prevent mildew from damaging the fabric/leather, and keep the foam cushioning from drying out.
Hope this helps.
Yours faithfully,
spook
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