Parkway first stage service manual

[Couv]

The HP seat was perfect, so I do not need to change it. Besides, I do not know the seat of a MK5/10. Sorry.

For posterity, how about a picture of the internals including the hp seat? Anything pertinent to servicing, e.g. o-ring sizes, would be helpful. TIA

 

[emoreira]

For posterity, how about a picture of the internals including the hp seat? Anything pertinent to servicing, e.g. o-ring sizes, would be helpful. TIA

The HP seat is in the center of the image. The white one.
The size of the O-ring I will have a better idea when I assemble it back today.

 

[Couv]

Thanks @emoreira ,

The seat does indeed look like a MK5/10 seat which is excellent news as they are easy to acquire, also produced aftermarket and available from Trident.

It could be a trick of the camera angle, but the piston head looks to be the same size as a MK10 (-017 o-ring) but the body and cap resemble a MK5 (ambient ports in the cap, not the body.) The round, hex key, swivel retainer also looks like a MK10, but the turret looks like a MK5 (-012.)