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62ItalianRagtop Samba Member
Joined: August 18, 2007 Posts: 1354 Location: Italy
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Posted: Thu Feb 23, 2017 1:22 pm Post subject: Fan belt : 9.5x900 vs 9.5x905 |
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Hi, I'm searching a 9.5x900 fan belt but I can find only 9.5x905 ...
Can I use anyone of these two without problems ? _________________ LOOKING FOR 62 ENGINE WITH NUMBER FROM 6.904.xxx TO 6.915.xxx
http://tettodistraccio.blogspot.com/
Last edited by 62ItalianRagtop on Thu Feb 23, 2017 1:57 pm; edited 1 time in total |
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Cusser Samba Member
Joined: October 02, 2006 Posts: 31362 Location: Hot Arizona
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Eric&Barb Samba Member
Joined: September 19, 2004 Posts: 24738 Location: Olympia Wash Rinse & Repeat
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Posted: Thu Feb 23, 2017 3:45 pm Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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Depends on if you are using stock sized pulleys or not. _________________ In Stereo, Where Available! |
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tasb The Distributor Distributor
Joined: April 27, 2002 Posts: 6371 Location: Pentwater, Michigan
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Posted: Thu Feb 23, 2017 5:25 pm Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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I've found the 905 to be hard to adjust correctly with a 36 hp. _________________ Roads Scholar &
1957 Kombi low mileage 36 hp governor equipped M 178 Slow Drag Winner 2014, 2015, 2018
1965 hardtop Deluxe Microbus owned since 1990 M 620 factory 12 v 1500cc
1961 (October)Single Cab- Road Trip Workhorse |
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Chitty1 Samba Member
Joined: April 28, 2016 Posts: 20 Location: Ontario Canada
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Posted: Thu Feb 23, 2017 5:28 pm Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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I have a 9.5 X 900 belt on my 1600DP engine and am looking for a spare as well. I understand that there is a difference when it comes to adjustment. _________________ 1963 Bug, 1600DP, 12V alternator conversion
2012 Mustang GT
1998 New Beetle (wife's)
Plus 2 other non-descript DD's |
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62ItalianRagtop Samba Member
Joined: August 18, 2007 Posts: 1354 Location: Italy
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Posted: Thu Feb 23, 2017 11:44 pm Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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Eric&Barb wrote: |
Depends on if you are using stock sized pulleys or not. |
Yes 62 beetle with stock sized pulleys _________________ LOOKING FOR 62 ENGINE WITH NUMBER FROM 6.904.xxx TO 6.915.xxx
http://tettodistraccio.blogspot.com/ |
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Cusser Samba Member
Joined: October 02, 2006 Posts: 31362 Location: Hot Arizona
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Posted: Fri Feb 24, 2017 6:07 am Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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905 v. 900 turns out to be 2.5mm on each side (as you look at it); that should be easy to adjust if you have all 10 thin washers to play with. _________________ 1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297 |
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mr. lang Samba Member
Joined: June 05, 2012 Posts: 308 Location: Germany
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Posted: Fri Feb 24, 2017 6:40 am Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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SPZ 887 Lw
Well maybe too minimalistic answer.
Search for this and you should find plenty of old looking belts without the molded teeth in 900mm length (SPZ 887 Lw = 900mm).
XPZ 887 Lw is the counterpart with the molded teeth. _________________ 1966 Bus | 1969 Bug | 1976 Passat LX two-door | 1984 Golf 2 C (daily driver)
There are three kinds of people: those who can count and those who can't
Und läuft ... |
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pwmcguire Samba Member
Joined: January 30, 2011 Posts: 1108 Location: Kennesaw GA
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Posted: Fri Feb 24, 2017 7:38 pm Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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It really does depend on what pulleys you have and the shims that you have. I find one tightens better than the other with mine. I can't remember which one I have. Actually it's the one my parts guy sells. |
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62ItalianRagtop Samba Member
Joined: August 18, 2007 Posts: 1354 Location: Italy
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Posted: Sat Feb 25, 2017 12:40 am Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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How much shims must have a 62 beetle ? six ? _________________ LOOKING FOR 62 ENGINE WITH NUMBER FROM 6.904.xxx TO 6.915.xxx
http://tettodistraccio.blogspot.com/ |
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piperj Samba Member
Joined: October 17, 2011 Posts: 35 Location: Silverton, Oregon
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Posted: Sat Feb 25, 2017 9:16 am Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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Great thread, following this closely...
I'm trying to find which belt gives me "center of the road" adjustability with stock components. By this I mean using all 10 shims as a starting point would appreciate finding a belt that allows me to be able to maintain correct deflection of belt tension and not run out of shims over the life of the belt. My experience is that I start out with a couple of shims and within a year or so, I'm down to one or less shim?! My 67 has stock generator, tower and pulleys. Do shims vary in thickness?
Not trying to over think this but there has to be a belt that offers maximum adjustability so we can keep our rigs running without having to change the belt out so often. I would bet the belts used today have evolved since these cars were made 50 years ago...probably like tires.
Thanks for any thoughts.
John _________________ 67 Sun Roof Bug |
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Eric&Barb Samba Member
Joined: September 19, 2004 Posts: 24738 Location: Olympia Wash Rinse & Repeat
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Posted: Sat Feb 25, 2017 9:27 am Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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62ItalianRagtop wrote: |
How much shims must have a 62 beetle ? six ? |
Manuals are great for this info.
Here from the Owner's Manual for '62.
You can access the Owner's Manuals thru the "Technical" button at upper right.
Have you found any Owner's Manuals in Italian?? Sure would be nice to get scans of such for this website. _________________ In Stereo, Where Available! |
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62ItalianRagtop Samba Member
Joined: August 18, 2007 Posts: 1354 Location: Italy
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Posted: Sat Feb 25, 2017 9:37 am Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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I can't understand from this picture .. it shows with arrow that some shims are moved so I don't understand which is the correct number.
Yes, I have an og 62 owner manual in Italian !! _________________ LOOKING FOR 62 ENGINE WITH NUMBER FROM 6.904.xxx TO 6.915.xxx
http://tettodistraccio.blogspot.com/ |
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Eric&Barb Samba Member
Joined: September 19, 2004 Posts: 24738 Location: Olympia Wash Rinse & Repeat
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Posted: Sat Feb 25, 2017 9:50 am Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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piperj wrote: |
My experience is that I start out with a couple of shims and within a year or so, I'm down to one or less shim?! My 67 has stock generator, tower and pulleys. Do shims vary in thickness? |
Not sure what you mean by a "couple of shims". Maybe a couple of shims between pulley halves?? Should be eight with new belt. If you are using a larger than stock, but still VW produced crankshaft pulley for hotter climates you might even need ten shims.
A year or so is not a really good scale to use. Some folks will only drive 300 miles or less and some will do 20,000 miles or more driving.... Personally have gotten 15,000 to 20,000 miles per year, and probably five or six years on a belt.
You can go thru a belt in less than 20 miles if the pulleys are rusty! So good idea to inspect both for rust or any sharp/rough surfaces where the belt rides. A little sand paper and elbow grease can solve that. _________________ In Stereo, Where Available! |
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Eric&Barb Samba Member
Joined: September 19, 2004 Posts: 24738 Location: Olympia Wash Rinse & Repeat
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Posted: Sat Feb 25, 2017 10:00 am Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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62ItalianRagtop wrote: |
I can't understand from this picture .. it shows with arrow that some shims are moved so I don't understand which is the correct number.
Yes, I have an og 62 owner manual in Italian !! |
The arrows just show where to put the shims when the belt wears down. With new properly sized belt, all eight shims should be between the pulley halves.
Please do consider sending Everett scans of your Owner's Manual. _________________ In Stereo, Where Available! |
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62ItalianRagtop Samba Member
Joined: August 18, 2007 Posts: 1354 Location: Italy
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Posted: Sat Feb 25, 2017 12:17 pm Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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So 8 shims .. thank you Eric&Barb ...
Ok for the owner manual !!! _________________ LOOKING FOR 62 ENGINE WITH NUMBER FROM 6.904.xxx TO 6.915.xxx
http://tettodistraccio.blogspot.com/ |
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piperj Samba Member
Joined: October 17, 2011 Posts: 35 Location: Silverton, Oregon
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Posted: Sat Feb 25, 2017 12:55 pm Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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Eric and Barb wrote:
Not sure what you mean by a "couple of shims". Maybe a couple of shims between pulley halves?? Should be eight with new belt. If you are using a larger than stock, but still VW produced crankshaft pulley for hotter climates you might even need ten shims.
Precisely my issue, installing a 9.5x905 belt I usually only get 2 shims inbetween pulley halves to where belt tension is correct on a new belt. I'm looking for a better spec belt to get at least 5 or more in between to start so I have some wear in room. I believe the 905 belt is correct for my year stock application. I live in PNW and temps are mild; I have a stock pulley set up. I drive low miles per year (under 1000).
So what belt spec would you recommend for changing my parameters?
Thanks for your thoughts. _________________ 67 Sun Roof Bug |
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Cusser Samba Member
Joined: October 02, 2006 Posts: 31362 Location: Hot Arizona
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Posted: Sat Feb 25, 2017 1:20 pm Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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piperj wrote: |
Precisely my issue, installing a 9.5x905 belt I usually only get 2 shims inbetween pulley halves to where belt tension is correct on a new belt. I'm looking for a better spec belt to get at least 5 or more in between to start so I have some wear in room. I believe the 905 belt is correct for my year stock application. So what belt spec would you recommend for changing my parameters? I drive low miles per year (under 1000). Thanks for your thoughts. |
1. I don't think you even have "an issue". Use the 905 belt you have.
2. With your usage of 1000 miles a year, I figure your belt will last 54.37 years, so you really don't have a real issue to worry about.
3. I run my own belts a little loose on purpose, can't rotate the engine using generator pulley nut unless I push in on the belt while turning. I do this because generator bearings or generators are a minor pain to replace, and my charging and cooling is not affected. _________________ 1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297 |
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Eric&Barb Samba Member
Joined: September 19, 2004 Posts: 24738 Location: Olympia Wash Rinse & Repeat
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Posted: Sat Feb 25, 2017 1:26 pm Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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piperj wrote: |
Precisely my issue, installing a 9.5x905 belt I usually only get 2 shims in between pulley halves to where belt tension is correct on a new belt. |
You can try a 9.5 x 900 belt then. Since the 900 mm is a shorter belt it should ride farther down in the upper pulley requiring more shims between the pulley halves.
When we went to a 7" diameter stock dog house crankshaft pulley and smaller 356 Porsche gen pulley for the 1641 cc SP engine in our 1960 walk thru panel camper conversion for more cooling air pumped over the engine. Went down to the FLAPS on a quiet day for them, and very politely asked if I could carefully check several sizes of belts to see what would fit properly. Also told them I would not try to just pry the belt into place like some idiots will try. I had backed the Bus into the parking spot right outside the store front window so they could see what I was doing, which was probably reassuring for them. Then took two sizes of belts out each time to try. After fitting a few got the right size that worked with all the shims between the pulley halves. _________________ In Stereo, Where Available! |
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Eric&Barb Samba Member
Joined: September 19, 2004 Posts: 24738 Location: Olympia Wash Rinse & Repeat
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Posted: Sat Feb 25, 2017 1:37 pm Post subject: Re: Fan belt : 9.5x900 vs 9.5x905 |
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Other way you could do it is to try the bigger stock pulley than what you have now. What size does is the one you have now? Guessing 6-3/4".
Bigger lower pulley will help cool the engine better. Up in the PNW we can get weather that is hotter than the N. part of Europe. _________________ In Stereo, Where Available! |
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