Passenger seat plywood base

[HAWK101]

Hi, I'm in the process of renewing my cab seats.

While doing a bit of research (this site) and others, it seems that the plywood base for the passenger seat is perforated?
Is this correct?
I have the plywood base, but mine is one whole piece, not a problem, as I can drill the holes.
Does anyone know how the holes are spaced etc? or have some kind of diagram/template of the layout?
Just wondering why the plywood base would be perforated? to help the foam breathe maybe????
Thanks
Lee (HAWK101)

 

[steelandcanvas]

The holes help the foam to drain if it gets wet. When I rebuilt my springer driver's seat, I had to replace the plywood and it seems the 1/2" holes were spaced about on about 4" centers. When you make your new seat board, shoot it with some clear laquer (or paint), to protect it from the elements.

 

[HAWK101]

Hi
Thanks for the reply and info, just started on mine today, had a less than busy day at work, so on with the seat base. Still got to drill most of the holes out, attach hardware etc.
Then paint.

 

[M-37Bruce]

Passenger Seat

Hope this helps, I did my seats a while back. I always thought the holes were ventilation for the battery box?

 

[HAWK101]

That's great,, thanks M-37Bruce,just another question my old passenger seat base was attached to two hinges at the back, allowing it to be flipped up, this doesn't seem right to me?
As the hinges look like any old door hinge.
So,,, as im in the process of making a new base, how where they originally secured in place?
Cheers
Lee (HAWK101)

 

[Mike_L]

The rear of the seat is trapped between the back cushion and the horizontal bracing that supports the back. The front drops down on two pins at each corner of the base/box (see TM 9-8030, fig 135) and held down by the latch that you can see part of in M-37Bruce's photo. The seat bottom will come out entirely once unlatched and the front lifted up. This gives you a lot more "elbow room" when working in the battery box or just loading stuff in the cavity under the seat.

If your seat has a prop to hold it up that sounds like a neat idea though I've gotten use to being able to take the seat out.

 

[3dAngus]

The holes will also allow the foam to compress and decompress a bit better, giving it great longetivity so that the foam doesn't prematurely compress and collapse or stay down.
That's some nice work. I need to redo my seats with some pup tent halves for material. I like the US stamped on it and might use that part of the shelter halves for the back. I don't think I want to sit on it.

 

[HAWK101]

For some reason my passenger seat base only has one pin (left side closest to drivers seat) I guess im going to have to get creative and make a pin for the other side of the base.
Thanks for the info Mike_L