BMW K bikes (Bricks)

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Albyalbatross1

Albyalbatross1
Life time member
Life time member
I finally got tired of my starter engaging after two or three tries...So I Cleaned it! Here is what i did for those who are interested.

First do THIS!!!
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 1this_12
I removed my intermediate housing or leave it on for this next step. Loosen off the bolt hoding the alternator drive. you will need to wedge the drive to undo the bolt. I ended up using a socket as the wood kept crushing.
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 2_rele10
Then using a bearing puller I had ground the claws down on I pulled the drive up a bit at a time until it would just pull out.
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 3_bear10

This is where you can remove your auxiliary housing if you left it on the engine and remove the freewheel and counter shaft.
Once the Freewheel was on the bench i could see the residue from 30 yrs oil
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 4_resi10

Removed the gear wheel from the clutch and auxillary shaft they just gently pull apart. Then remove the 6 bolts holding the covering plate over the gear wheel. Then set the gear wheel on the bench and Gently pries the sprag clutch out.
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 6_out_10

Here is my gummed up sprag. Be very care full not to dislodge any of the lobes. They are held in by a very small fine spring.
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 8_gumm10
The Very Fine Springs
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 10_lil10
Now put it in a small tray of solvent to soak for a bit. I should have placed it back in the ring to clean it as I managed to knock some of the lobes out. Use a toothbrush or whatever yu fancy. Once its all clean start to put it back together.
Put the ring on auxillary shaft, spacer ring in next followed by some oil and the sprag clutch. be sure its the right way around!
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 16_spa10

Then some more oil and then the cover plate and bolts. Torque up to spec..
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 17_tor10

Next I did the bearings in the Gear Wheel. These came out easily enough with a tube socket as a drift and with some heat..
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 5_out_10

Time for Coffee!!!!!!! Cheeky Cafe Staff!!
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 12_che10

I used a length of threaded rod I had lying about to pull the new bearings in.
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 14_bea10

New Bearings in place. be sure to take them in far enough.
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 15_new10
Now oil the sprag clutch through the holes in the ring and oil the Auxilary shaft and the gear wheel bearings.
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 18_oil10
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 19_oil10
Then gently twist the auxiliary shaft into the sprag clutch turning the same way as the lobes point and it should just slide right back in.
I then did a naughty thing and cleaned the threads up.(might want to do this first! then clean things up)
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 20_thr10
Thats it for this bit. Next the bearing and seal for the intermediate housing and the bearing in the engine block for the auxiliary shaft.
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 21_all10
To replace the bearing in the block for the auxiliary shaft you will need a blind bearing puller. (good sets for 30 bucks in aus)This is how it comes out. I then made a drift up to drive the new one home from a large bolt i linished down to size.
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 29_out10

Next I replaced the bearing /seal in the Intermediate housing. It was easy to remove if you follow the instructions in your haynes manual.
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 22_new10
Bearing
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 23_new10
Torque/Loctite
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 24_tor10
Put it all back together
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 25_sea10
Torque the drive bolt up...
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. 26_tor10
All done. Do not forget to put the counter shaft in before you torque things up Embarassed Embarassed This solved my problem of a spinning sprag clutch. I changed the bearings because I was in there. I am still on the trail of a small rattle !!!!!



Last edited by Albyalbatross1 on Tue Jul 24, 2012 4:03 am; edited 1 time in total (Reason for editing : ..)

    

Lazyboy

Lazyboy
Silver member
Silver member
Excellent how to and photos ! I think you should write a manual " K Bikes For DUMMIES "


__________________________________________________
1984 BMW K100RT

Bikes Name: Lazyboy
    

charlie99

charlie99
VIP
VIP
great post alby ...

man..... you have done things many of us just dream of doing ....

cheers !!!


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OSprag Clutch & Cleaning the Sprag clutch and bearing replacement. Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

88

88
Life time member
Life time member
@charlie99 wrote:great post alby ...

man..... you have done things many of us just dream of doing ....

cheers !!!

+1 Alby - Such clarity would inspire confidence in even a ludite like me tackling the job.

Moderator....move to "How to" section please!

88KE


__________________________________________________
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. Ir-log11 88....May contain nuts!Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. Ir-log11

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

Bike: K100LT 1988. 0172363. AKA the Bullion Brick! Mods: k1100 screen and stands.
K1: 1990. 6374189. Custom Stealth Black paint.
    

charlie99

charlie99
VIP
VIP
done ...great post !


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OSprag Clutch & Cleaning the Sprag clutch and bearing replacement. Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

BIG D

BIG D
Life time member
Life time member
Cool

Top job Alby, thats a good write up many thanks.



BIG D

    

kfilipow

kfilipow
Silver member
Silver member
Thanks Alby. I agree with 88KE

kf

    

krambo

krambo
Life time member
Life time member
A great and informative post Alby - thanks so much Wink


__________________________________________________
1984 BMW K100RT, 1993 BMW K1100LTIC,1982 Kawasaki KZ1100 Spectre
"Aut viam inveniam aut faciam." Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. Uk-bmw12
http://www.its-personal.net
    

Oldgoat

Oldgoat
Life time member
Life time member
Outstanding pics Alby! Cool

OG

    

88

88
Life time member
Life time member
After knocking out some Pawls I found the best way to handle them is to use some dental floss to hold the tiny spring open and insert the pawl from the inside out. It also makes it easier to work in an anticlockwise direction.

Once I discovered this technique I  became brave enough to take them all out and refit them individually. Just make sure you've got them the right way round


Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. K1100_10


__________________________________________________
Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. Ir-log11 88....May contain nuts!Sprag Clutch & Cleaning the Sprag clutch and bearing replacement. Ir-log11

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

Bike: K100LT 1988. 0172363. AKA the Bullion Brick! Mods: k1100 screen and stands.
K1: 1990. 6374189. Custom Stealth Black paint.
    

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