357 starting problem after brake change

[Brushcutter]

Had to change a brakes band on my 357 today. What a pain that was, what was worse is that i didn't break the dam thing.

 

Anyway after getting the break band spring in and the whole side plate back together i tried to start it. It wont turn over with the brake set. Take the brake off and it turns over fine. Took the clutch off and put it back on (had it off ealier in the day to check the sprocket).

 

What have i done wrong?

 

Cheers guys.

[spudulike]

It sounds like something is locking the crankshaft when the brake is on, have you had the clutch apart, is the bearing OK, is there twine or dirt around the clutch/sprocket etc.

 

With the brake off, it sounds like the clutch and sprocket are spinning together and when you put the brake on, the engine stalls as the sprocket should be held and the clutch should still spin within it and not alter the idle!

[spudulike]

On thinking about it, if the clutch has been off, it is possible when the clutch drum went back on, it wasn't meshed with the oiler pinion/worm drive and this means that the sprocket is standing forward of it's normal position and locking against the clutch - just a thought:001_rolleyes:

[Brushcutter]

On thinking about it, if the clutch has been off, it is possible when the clutch drum went back on, it wasn't meshed with the oiler pinion/worm drive and this means that the sprocket is standing forward of it's normal position and locking against the clutch - just a thought:001_rolleyes:

 

Yes maybe. I did take the little black gear off to make sure it was sitting back in place properly. Maybe i didn't get it in properly i'll check tomorrow.

 

Out of interest what is the best way to change a husky chain brake.

[spudulike]

Yes maybe. I did take the little black gear off to make sure it was sitting back in place properly. Maybe i didn't get it in properly i'll check tomorrow.

 

Out of interest what is the best way to change a husky chain brake.

 

With care and wearing safety specs usually! I have done them before usually with the aid of a big screwdriver but not really a job I have done regularly!

[Brushcutter]

With care and wearing safety specs usually! I have done them before usually with the aid of a big screwdriver but not really a job I have done regularly!

 

This is the 3rd chainbreak in 11 years. One was on my CS30 another was one i did break and this one.

 

I put it all together and compressed the spring with mole grips and then pushed the bit that engages with the break handle onto it's pin.

[spudulike]

Sounds about right, it is usually a case of putting the chain break mechanism in to the "On" position and then cajoling the spring in to position with grips and or screwdrivers.

[GardenKit]

The brake reassembly can be a bitch if you dont do it right.

Just as Spud says, have the brake in the ON position, as this gets the longest length on the compression spring.

 

Assemble the engagement mechanism onto the pin and put it all in place whilst leaving the rear end of the spring out of the channel.

 

Make sure the nylon block at the business end of the spring and band is correctly seated in the end of the spring channel and hold it firmly down with the heel of your left hand.

 

Using your index finger of the left hand to control the position of the rear end of the spring, and your right hand to use a medium flat blade screwdriver, just lever the end of the spring into the closed end of the channel and push down with the finger.

Hold it down whilst you slide the cover into place and put the screws in.

 

Then release the chain break mechanism, this is the trickiest job as its a job to find something to grip the 3 lobe actuator. The wrong tools can cause damage to the mechanism, the cover, your hands and your temper. Best to quickly make a tool similar to the one on one of my recent posts on Spuds magnificent 'on the bench' thread.

http://arbtalk.co.uk/forum/chainsaws/33857-whats-your-bench-today-145.html

Edited November 13, 2012 by GardenKit
found link

[spudulike]

The brake reassembly can be a bitch if you dont do it right.

Just as Spud says, have the brake in the ON position, as this gets the longest length on the compression spring.

 

Assemble the engagement mechanism onto the pin and put it all in place whilst leaving the rear end of the spring out of the channel.

 

Make sure the nylon block at the business end of the spring and band is correctly seated in the end of the spring channel and hold it firmly down with the heel of your left hand.

 

Using your index finger of the left hand to control the position of the rear end of the spring, and your right hand to use a medium flat blade screwdriver, just lever the end of the spring into the closed end of the channel and push down with the finger.

Hold it down whilst you slide the cover into place and put the screws in.

 

Then release the chain break mechanism, this is the trickiest job as its a job to find something to grip the 3 lobe actuator. The wrong tools can cause damage to the mechanism, the cover, your hands and your temper. Best to quickly make a tool similar to the one on one of my recent posts on Spuds magnificent 'on the bench' thread.

http://arbtalk.co.uk/forum/chainsaws/33857-whats-your-bench-today-145.html

 

"Magnificent"....I gather U2 saw the thread and wrote the song....think that one may have gone over any non U2 fans out there!!

 

Cheers Barrie:thumbup:

[GardenKit]

"Magnificent"....I gather U2 saw the thread and wrote the song....think that one may have gone over any non U2 fans out there!!

 

Cheers Barrie:thumbup:

Went way over my head Steve.