357 clutch/drum advice please!

[Adamam]

Hello!

 

The cheap 357 I'm trying to get running is ANNOYING.

 

There's way too much lateral play in the clutch drum. Why would this be?

 

If you look at the shoulder of the crank shaft in the photo, it looks too high!

 

The oiler/worm gear is new and correct. The bearing is fine. The drum isn't new, but I have two and they are both showing the same behaviour.

 

Could it be a worn crank? I do not want it to be a worn crank.

 

[peatff]

Could there be a washer missing ?

[Adamam]

Could there be a washer missing ?

 

There's no washer on the the IPL and there's not really anywhere to put one.

 

The worm drive fits straight onto the crank shaft, and runs against the oil cover plate thing.

 

The clutch drum fits into the worm gear, so no washer there. The only place for one would be between the clutch and the drum...

 

[adw]

There is no washer here, i have seen this before to the extent that the drum comes away from the oil pump drive gear,i do not think it is wear in the crank, there is nothing wrong with end float, as long as the sprocket does not come out of the oil pump drive gear.

[Adamam]

There is no washer here, i have seen this before to the extent that the drum comes away from the oil pump drive gear,i do not think it is wear in the crank, there is nothing wrong with end float, as long as the sprocket does not come out of the oil pump drive gear.

 

It seems pretty excessive here though. I don't have faith in the dogs being mated with the oil drive.

 

Stupid saw!

 

[wicklamulla]

is the black plastic oil drive gear worn down excessively ?

[Adamam]

is the black plastic oil drive gear worn down excessively ?

 

No, it's new. That was my first thought.

 

Is odd.

[njm]

There is no washer here, i have seen this before to the extent that the drum comes away from the oil pump drive gear,i do not think it is wear in the crank, there is nothing wrong with end float, as long as the sprocket does not come out of the oil pump drive gear.

 

As above , looks about the norm

[SawTroll]

Are you sure that drum is OEM, and not aftermarket - or the crank?

 

I'm thinking the splined part of the drum could be too short?

 

I have never heard of this issue before, and have been active on many saw forums for over a decade.

Edited May 29, 2015 by SawTroll

[spudulike]

Seen this before, I reckon the oiler pinion is incorrect. The 357 one has a flange on it on the internal bore that locates on a shoulder on the crank. This feature stops it contacting the crank seal unlike the 346 that has no flange but has a washer.

 

It is common for this flange to wear and this takes out the seal.

 

Make sure the pinion is the correct part as I reckon you have a 346 one!