Don't start many threads in this forum, so not too sure where this thread belongs.
If should be somewhere else, then maybe a Mod could move it over there.
Thought this write up might be useful for those wanting to repair an inoperative chainbrake that may have broken parts or are basket cases that maybe missing some parts. Along with the IPL's for several related model series, there is a factory service manual that covers disassembly and re-assembly of the chainbrake. Took some photos showing parts and where they go for re-assembly to help. The photos are of the later model 272 & 288's chainbrake specifically, but are relevant to others in the 200 series saws as well as the 50 series and possibly the 300 series.
Photos have the text write up added to the photo mostly cause it seems easier to look at a pic and read the write up next to the pic without having to jump all around. The file names are in alphabetical order which corresponds to the order of assembly and tried to give them meaningful names. Photo quality isn't the best but are small for dial-up folks.
Zip files are posted for the writeup + pics, the service manual, and the IPLs so this stuff can be saved just by downloading these zip files and not have to wade though a bunch of posts saving stuff. Service manual zip file is 3.5 Mb. Writeup and Pics zip is 1 Mb. IPL zip 1/4 Mb.
The 272 IPL does share a few common chainbrake parts with the other models and these are marked (for serial number after 4500001). The 272 IPL for 4500001 and below is included as part numbers are different for some key parts. Also note other parts are common between IPL's other than the 272. One thing to watch with the 272 is the point of transition to the 1997 production year. The 272xp here is serial serial number 9634xxxx, yet the cast part numbers show it belongs to the 1997 series. A transition year. The reason for marking the common small parts is the cost of shipping a 3 dollar part can be 3 times the part cost.
It would have been useful to have the factory numbers for the tension values (or length) of the brake coil spring and handle clip spring. Maybe someone has these, if they exist, and can provide them.
Not having any related Jonsered IPL's, it wasn't possible to check for common parts. If someone has these they'd be handy to include with all the other IPL's.
List of files
272CBIPL-after4500001.jpg
272CBIPL-upto4500001.jpg
288-281CBIPL.jpg
394CBIPL.jpg
50CBIPL.jpg
51-55CBIPL.jpg
aawriteup.txt
abrakeassembly.doc
abrakeassembly.txt
bCB_Parts.jpg
cCB_Tools.jpg
dCB_BrakeEngaged.jpg
eCB_BrakeCoverParts.jpg
fCB_KneeBandCoil.jpg
gCB_FingerSpringInCover.jpg
hCB_FingerSpringKneeLinkIn.jpg
iCB_HandlePartsClipSpringInHandle.jpg
jCB_AttachBrakeHandle.jpg
kCB_BrakeBandCoilSpring.jpg
lCB_CoilSpringCover.jpg
mCB_Complete.jpg
zDocsPics.zip
zIPLs.zip
zServicemanual.zip
Pics in the next couple of posts.
These are the three zip files with all the stuff in them.
View attachment 231223
View attachment 231222
View attachment 231224
If should be somewhere else, then maybe a Mod could move it over there.
Thought this write up might be useful for those wanting to repair an inoperative chainbrake that may have broken parts or are basket cases that maybe missing some parts. Along with the IPL's for several related model series, there is a factory service manual that covers disassembly and re-assembly of the chainbrake. Took some photos showing parts and where they go for re-assembly to help. The photos are of the later model 272 & 288's chainbrake specifically, but are relevant to others in the 200 series saws as well as the 50 series and possibly the 300 series.
Photos have the text write up added to the photo mostly cause it seems easier to look at a pic and read the write up next to the pic without having to jump all around. The file names are in alphabetical order which corresponds to the order of assembly and tried to give them meaningful names. Photo quality isn't the best but are small for dial-up folks.
Zip files are posted for the writeup + pics, the service manual, and the IPLs so this stuff can be saved just by downloading these zip files and not have to wade though a bunch of posts saving stuff. Service manual zip file is 3.5 Mb. Writeup and Pics zip is 1 Mb. IPL zip 1/4 Mb.
The 272 IPL does share a few common chainbrake parts with the other models and these are marked (for serial number after 4500001). The 272 IPL for 4500001 and below is included as part numbers are different for some key parts. Also note other parts are common between IPL's other than the 272. One thing to watch with the 272 is the point of transition to the 1997 production year. The 272xp here is serial serial number 9634xxxx, yet the cast part numbers show it belongs to the 1997 series. A transition year. The reason for marking the common small parts is the cost of shipping a 3 dollar part can be 3 times the part cost.
It would have been useful to have the factory numbers for the tension values (or length) of the brake coil spring and handle clip spring. Maybe someone has these, if they exist, and can provide them.
Not having any related Jonsered IPL's, it wasn't possible to check for common parts. If someone has these they'd be handy to include with all the other IPL's.
List of files
272CBIPL-after4500001.jpg
272CBIPL-upto4500001.jpg
288-281CBIPL.jpg
394CBIPL.jpg
50CBIPL.jpg
51-55CBIPL.jpg
aawriteup.txt
abrakeassembly.doc
abrakeassembly.txt
bCB_Parts.jpg
cCB_Tools.jpg
dCB_BrakeEngaged.jpg
eCB_BrakeCoverParts.jpg
fCB_KneeBandCoil.jpg
gCB_FingerSpringInCover.jpg
hCB_FingerSpringKneeLinkIn.jpg
iCB_HandlePartsClipSpringInHandle.jpg
jCB_AttachBrakeHandle.jpg
kCB_BrakeBandCoilSpring.jpg
lCB_CoilSpringCover.jpg
mCB_Complete.jpg
zDocsPics.zip
zIPLs.zip
zServicemanual.zip
Pics in the next couple of posts.
These are the three zip files with all the stuff in them.
View attachment 231223
View attachment 231222
View attachment 231224
