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fredsheldon
- Platinum Member
- Posts: 1175
- Joined: Tue Jan 17, 2012 1:31 pm
- Location: The Woodlands, Texas
I would think the air in the chamber would heat up under use and would need somewhere to go as it expands otherwise it would be forced out thru the seals.
Fred Sheldon
The Woodlands, Tx
'52 10ER # 60869 (restored in 2012, used as a dedicated drill press), '52 10ER # 88712 (restored 01/2013), 52 10ER # 71368 (in process of restoring), '83 500 Shorty with OPR installed, '83 520 PowerPro with Lift Assist, 6" Joiner, 6" Belt Sander, 18" Jig Saw, 11" Band Saw, 12" ProPlaner, SS Crosscut Table. SS Dust Collector, Hitachi 1/2" router, Work Sharp 3000 with all attachement, Nova G3 Chuck, Universal Tool Rest, Appalachia Tool Works Sled.
The Woodlands, Tx
'52 10ER # 60869 (restored in 2012, used as a dedicated drill press), '52 10ER # 88712 (restored 01/2013), 52 10ER # 71368 (in process of restoring), '83 500 Shorty with OPR installed, '83 520 PowerPro with Lift Assist, 6" Joiner, 6" Belt Sander, 18" Jig Saw, 11" Band Saw, 12" ProPlaner, SS Crosscut Table. SS Dust Collector, Hitachi 1/2" router, Work Sharp 3000 with all attachement, Nova G3 Chuck, Universal Tool Rest, Appalachia Tool Works Sled.
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dusty
- Platinum Member
- Posts: 21481
- Joined: Wed Nov 22, 2006 6:52 am
- Location: Tucson (Wildcat Country), Arizona
I would think that there wouold be a vent hole in that chamber for this very purpose.fredsheldon wrote:I would think the air in the chamber would heat up under use and would need somewhere to go as it expands otherwise it would be forced out thru the seals.
"Making Sawdust Safely"
Dusty
Sent from my Dell XPS using Firefox.
Dusty
Sent from my Dell XPS using Firefox.
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pieceseeker
- Gold Member
- Posts: 370
- Joined: Mon Jan 07, 2013 12:13 pm
- Location: Lawrenceville, Georgia
Seriously, I can feel the air moving out of that vent hole as if it's being pumped out. It's not a lot mind you, but its there.
Just got an idea, I'll have to find a balloon first. I'll hold the balloon opening up tight against the vent hole and see what positive and/or negative pressure effect have on the balloon.
Check back later!
Just got an idea, I'll have to find a balloon first. I'll hold the balloon opening up tight against the vent hole and see what positive and/or negative pressure effect have on the balloon.
Check back later!
" I cut it twice and it's still too short"
2006 Mark 520, 1983 Mark V model 500(soon to be a shorty)/Power Stand mounted Planer/Jointer/Belt Sander/Band Saw/Jigsaw on pwr stand/Scroll saw/Strip Sander/Power Station/Speed Reducer/Increaser/2 Nova chucks.... 12" DeWalt sliding compound mitre saw, 10" Delta tabletop saw, Bosch router and jig saw, Makita circular saw, Graco V-COMP HVLP, Festool CT-26 E Hepa
2006 Mark 520, 1983 Mark V model 500(soon to be a shorty)/Power Stand mounted Planer/Jointer/Belt Sander/Band Saw/Jigsaw on pwr stand/Scroll saw/Strip Sander/Power Station/Speed Reducer/Increaser/2 Nova chucks.... 12" DeWalt sliding compound mitre saw, 10" Delta tabletop saw, Bosch router and jig saw, Makita circular saw, Graco V-COMP HVLP, Festool CT-26 E Hepa
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pieceseeker
- Gold Member
- Posts: 370
- Joined: Mon Jan 07, 2013 12:13 pm
- Location: Lawrenceville, Georgia
Uh, there is a vent hole.dusty wrote:I would think that there wouold be a vent hole in that chamber for this very purpose.
" I cut it twice and it's still too short"
2006 Mark 520, 1983 Mark V model 500(soon to be a shorty)/Power Stand mounted Planer/Jointer/Belt Sander/Band Saw/Jigsaw on pwr stand/Scroll saw/Strip Sander/Power Station/Speed Reducer/Increaser/2 Nova chucks.... 12" DeWalt sliding compound mitre saw, 10" Delta tabletop saw, Bosch router and jig saw, Makita circular saw, Graco V-COMP HVLP, Festool CT-26 E Hepa
2006 Mark 520, 1983 Mark V model 500(soon to be a shorty)/Power Stand mounted Planer/Jointer/Belt Sander/Band Saw/Jigsaw on pwr stand/Scroll saw/Strip Sander/Power Station/Speed Reducer/Increaser/2 Nova chucks.... 12" DeWalt sliding compound mitre saw, 10" Delta tabletop saw, Bosch router and jig saw, Makita circular saw, Graco V-COMP HVLP, Festool CT-26 E Hepa
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pieceseeker
- Gold Member
- Posts: 370
- Joined: Mon Jan 07, 2013 12:13 pm
- Location: Lawrenceville, Georgia
The only things that would need to be added then, is bells and whistles! 
" I cut it twice and it's still too short"
2006 Mark 520, 1983 Mark V model 500(soon to be a shorty)/Power Stand mounted Planer/Jointer/Belt Sander/Band Saw/Jigsaw on pwr stand/Scroll saw/Strip Sander/Power Station/Speed Reducer/Increaser/2 Nova chucks.... 12" DeWalt sliding compound mitre saw, 10" Delta tabletop saw, Bosch router and jig saw, Makita circular saw, Graco V-COMP HVLP, Festool CT-26 E Hepa
2006 Mark 520, 1983 Mark V model 500(soon to be a shorty)/Power Stand mounted Planer/Jointer/Belt Sander/Band Saw/Jigsaw on pwr stand/Scroll saw/Strip Sander/Power Station/Speed Reducer/Increaser/2 Nova chucks.... 12" DeWalt sliding compound mitre saw, 10" Delta tabletop saw, Bosch router and jig saw, Makita circular saw, Graco V-COMP HVLP, Festool CT-26 E Hepa
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JPG
- Platinum Member
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- Joined: Wed Dec 10, 2008 7:42 pm
- Location: Lexington, Ky (TAMECAT territory)
Well this is certainly getting deeper into the 'situation'.
I overlooked the heat expansion of the air(as well as the oil).
Dusty, the lower chamber does have a bleeder hole - the cotter pin hole). I also forgot about that for the lower shaft. I was concentrating on the upper shaft which does not need relief. The volume inside the crankcase does not vary(upper shaft out, lower shaft in and vice-versa).
My initial reaction to the cotter pin was the same - why? My current very unsure recollection was I concluded it served as a stop while assembling.
The air/oil in the lower chamber is indeed undergoing volume changes as the shaft moves in/out. As previously stated that is relieved through the cotter pin hole. So de pump has been found!!! The crankcase pressure will indeed oscillate.
Maybe the cotter pin serves as a flow control for the lower chamber 'bleeder' hole.
My old online obtained manual does not include de cotter pin etc, but I remember it being in thar!
I overlooked the heat expansion of the air(as well as the oil).
Dusty, the lower chamber does have a bleeder hole - the cotter pin hole). I also forgot about that for the lower shaft. I was concentrating on the upper shaft which does not need relief. The volume inside the crankcase does not vary(upper shaft out, lower shaft in and vice-versa).
My initial reaction to the cotter pin was the same - why? My current very unsure recollection was I concluded it served as a stop while assembling.
The air/oil in the lower chamber is indeed undergoing volume changes as the shaft moves in/out. As previously stated that is relieved through the cotter pin hole. So de pump has been found!!! The crankcase pressure will indeed oscillate.
Maybe the cotter pin serves as a flow control for the lower chamber 'bleeder' hole.
My old online obtained manual does not include de cotter pin etc, but I remember it being in thar!
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╟JPG ╢
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
╟JPG ╢
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
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pieceseeker
- Gold Member
- Posts: 370
- Joined: Mon Jan 07, 2013 12:13 pm
- Location: Lawrenceville, Georgia
Well, my balloon test to demonstrate the pressure changes in the crankcase has failed miserably. Too much volume in the deflated balloon to show the minute changes in pressure.
So, I cut a 1" x 2" strip of cellofane to demonstrate. Taped it to the side of the jigsaw and over the vent hole. Here is what I saw.
The vid is not really clear, but the movement of air in and out the vent is obvious.
http://www.youtube.com/watch?v=W5u0cQ1EIMk
Apparently, a fine oil mist is also dispersed out this vent hole (residue on the cellofane), hence the accumulation of gummy gunk in the hole over time...especially with wood fibre floating in the air!
So, I cut a 1" x 2" strip of cellofane to demonstrate. Taped it to the side of the jigsaw and over the vent hole. Here is what I saw.
The vid is not really clear, but the movement of air in and out the vent is obvious.
http://www.youtube.com/watch?v=W5u0cQ1EIMk
Apparently, a fine oil mist is also dispersed out this vent hole (residue on the cellofane), hence the accumulation of gummy gunk in the hole over time...especially with wood fibre floating in the air!
" I cut it twice and it's still too short"
2006 Mark 520, 1983 Mark V model 500(soon to be a shorty)/Power Stand mounted Planer/Jointer/Belt Sander/Band Saw/Jigsaw on pwr stand/Scroll saw/Strip Sander/Power Station/Speed Reducer/Increaser/2 Nova chucks.... 12" DeWalt sliding compound mitre saw, 10" Delta tabletop saw, Bosch router and jig saw, Makita circular saw, Graco V-COMP HVLP, Festool CT-26 E Hepa
2006 Mark 520, 1983 Mark V model 500(soon to be a shorty)/Power Stand mounted Planer/Jointer/Belt Sander/Band Saw/Jigsaw on pwr stand/Scroll saw/Strip Sander/Power Station/Speed Reducer/Increaser/2 Nova chucks.... 12" DeWalt sliding compound mitre saw, 10" Delta tabletop saw, Bosch router and jig saw, Makita circular saw, Graco V-COMP HVLP, Festool CT-26 E Hepa
This video is private.pieceseeker wrote:Well, my balloon test to demonstrate the pressure changes in the crankcase has failed miserably. Too much volume in the deflated balloon to show the minute changes in pressure.
So, I cut a 1" x 2" strip of cellofane to demonstrate. Taped it to the side of the jigsaw and over the vent hole. Here is what I saw.
The vid is not really clear, but the movement of air in and out the vent is obvious.
http://www.youtube.com/watch?v=fzB978HE-1c
Apparently, a fine oil mist is also dispersed out this vent hole (residue on the cellofane), hence the accumulation of gummy gunk in the hole over time...especially with wood fibre floating in the air!
Ed
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pieceseeker
- Gold Member
- Posts: 370
- Joined: Mon Jan 07, 2013 12:13 pm
- Location: Lawrenceville, Georgia
oops! I'll try to fix.
" I cut it twice and it's still too short"
2006 Mark 520, 1983 Mark V model 500(soon to be a shorty)/Power Stand mounted Planer/Jointer/Belt Sander/Band Saw/Jigsaw on pwr stand/Scroll saw/Strip Sander/Power Station/Speed Reducer/Increaser/2 Nova chucks.... 12" DeWalt sliding compound mitre saw, 10" Delta tabletop saw, Bosch router and jig saw, Makita circular saw, Graco V-COMP HVLP, Festool CT-26 E Hepa
2006 Mark 520, 1983 Mark V model 500(soon to be a shorty)/Power Stand mounted Planer/Jointer/Belt Sander/Band Saw/Jigsaw on pwr stand/Scroll saw/Strip Sander/Power Station/Speed Reducer/Increaser/2 Nova chucks.... 12" DeWalt sliding compound mitre saw, 10" Delta tabletop saw, Bosch router and jig saw, Makita circular saw, Graco V-COMP HVLP, Festool CT-26 E Hepa