Foam Pad in the bottom of 802/803a

[Toolslinger]

I'm pretty sure I've seen this discussed briefly in the past, but I sure can't find the right search string...

The foam pad in the bottom of the 802 I'm working on is soaked with fuel, and oil, and it's rotting apart. I can pretty much identify what kind of foam to use, but it looks like it is going to be a real PITA to get at the cover panel it is mounted to under the engine.

Has anyone replaced that foam without having the engine removed from the skid? Given the ability I'd replace it on both my machines, which are both really in bad shape as far as that goes. I'm not pulling the engine out to do this, it would just be nice to clean it up.

 

[Light in the Dark]

Only way is to pick the machine up and work under it. Its an irrelevant panel to me, just cover the opening with hardware cloth for rodent reasons and remove it if its too unsightly. Should just be push pins if memory serves, holding it in place.

 

[2Pbfeet]

I'm pretty sure I've seen this discussed briefly in the past, but I sure can't find the right search string...

The foam pad in the bottom of the 802 I'm working on is soaked with fuel, and oil, and it's rotting apart. I can pretty much identify what kind of foam to use, but it looks like it is going to be a real PITA to get at the cover panel it is mounted to under the engine.

Has anyone replaced that foam without having the engine removed from the skid? Given the ability I'd replace it on both my machines, which are both really in bad shape as far as that goes. I'm not pulling the engine out to do this, it would just be nice to clean it up.

The foam on the underside of the vent below engine oil pan? If so, the panel unbolts. IIRC, I put the genset skids on some crossways 8x8s to improve the access, but if you are more flexible than me, I guess that you might be able to snake an arm under.

All the best, 2PbFeet

 

[Toolslinger]

It does unbolt. 4 of the usual suspects it appears from the TM. The current project is up on an A3 trailer, so I should have reasonable access to the underside. I can pull the anti mouse mesh easily enough.

Looking in from the top it doesn't appear the plate will come out from under the engine. I suppose I could just rip the current mess down from below, and make a slotted piece as a replacement so I don't have to deal with getting it around the legs that hold the plate up from the skid.

If I had an OEM part to replace it with, it would suck, but at least it would be the right size with the correct holes. Hopefully I can get the existing out in a condition that I can use it as a template. The TM indicates they were to be cut from bulk stock, but I expect they weren't replaced too often unless the whole unit was apart and it was easy.

 

[2Pbfeet]

On

It does unbolt. 4 of the usual suspects it appears from the TM. The current project is up on an A3 trailer, so I should have reasonable access to the underside. I can pull the anti mouse mesh easily enough.

Looking in from the top it doesn't appear the plate will come out from under the engine. I suppose I could just rip the current mess down from below, and make a slotted piece as a replacement so I don't have to deal with getting it around the legs that hold the plate up from the skid.

If I had an OEM part to replace it with, it would suck, but at least it would be the right size with the correct holes. Hopefully I can get the existing out in a condition that I can use it as a template. The TM indicates they were to be cut from bulk stock, but I expect they weren't replaced too often unless the whole unit was apart and it was easy.

IIRC: once it is unbolted you can slide it out from under the engine, albeit without the batteries or trays.

I took a deep dive into the foam specifications at one point, and the most detailed specification that I found called out a flame resistant foam, coated with a latex "paint" to reduce water and oil infiltration, though my sense from reading posts here is that the foam used wasn't universally coated. YMMV...

All the best, 2PbFeet

 

[Toolslinger]

In looking around, I found it indicated to be Polyimide Foam. Pretty interesting stuff from a materials standpoint. Flame retardant, low smoke, high temp, low temp, very little dimensional change due to temp. Apparently it doesn't get fragile when dipped in liquid nitrogen.

I'll do a little digging on a coating. The TM doesn't indicate anything beyond cutting it from a bulk part number, so perhaps the coating was just at the manufacturer.

 

[2Pbfeet]

In looking around, I found it indicated to be Polyimide Foam. Pretty interesting stuff from a materials standpoint. Flame retardant, low smoke, high temp, low temp, very little dimensional change due to temp. Apparently it doesn't get fragile when dipped in liquid nitrogen.

I'll do a little digging on a coating. The TM doesn't indicate anything beyond cutting it from a bulk part number, so perhaps the coating was just at the manufacturer.

If you find a reasonably priced source, I'd be interested. The ones that I found weren't exactly inexpensive. I wonder if after the Crans-Montana Swiss bar fire more sources may be forthcoming.

All the best, 2PbFeet

 

[Guyfang]

The TM doesn't indicate anything beyond cutting it from a bulk part number, so perhaps the coating was just at the manufacturer.

Yes, it came from the manufacturer that way. Bulk item, ordered and cut at the repairing unit.