Recent Posts

Pages: [1] 2 3 4 5 6 ... 10
1
Dolmar Makita / Re: Sachs Dolmar 122 rebuild
« Last post by Yozhek on Today at 06:21:17 pm »
Clutch and Magneto

With the oil pump back in the crankcase, the oil flow adjuster fitted and everything checked the pump side oil seal can be pressed in.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
There were two types of clutch used in the lifetime of the 122 series, both are interchangable, the early ones had bonded clutch shoes, they didn't wear the clutch drum out like the later all metal clutch but if they got overheated or oil soaked the clutch lining would come unbonded and could wear through the side of the crankcase. The clutch on this saw was dry and in good shape so it was refitted.
[ Guests cannot view attachments ]
The 122 and 122s used a Bosch points magneto, these things are indestructable, in all the years i worked with these saws not one replacement part was ever needed for one of these magnetos. All i had to do here was clean the points, add some grease to the points pivot and cam wick and check the gap was 15 thou, perfect spark...
[ Guests cannot view attachments ]
By the way, the points cam fits with the key piece toward the flywheel and the wavey washer under the cam not on top.
[ Guests cannot view attachments ]
On with the flywheel, fan and starter dogs
[ Guests cannot view attachments ]
And we have something looking like a saw again, just got to be patient while i wait for the barrel and piston to come from Chainsawr.
[ Guests cannot view attachments ]
Thanks for reading
Ade
2
Dolmar Makita / Re: Sachs Dolmar 122 rebuild
« Last post by Yozhek on Today at 06:08:15 pm »
Thanks Cut4Fun :-)
3
Poulan / Re: Craftsman Pro 3.7 sky blue
« Last post by Cut4fun . on Today at 04:02:14 pm »
More info from guy I know.

 Original posting of these saws. The blue one is ported and muffler mod and said he painted it "choice color". Nothing original about it on the paint
4
Poulan / Craftsman Pro 3.7 sky blue
« Last post by Cut4fun on Today at 07:44:23 am »
Anyone ever seen a sky blue craftsman poulan 3.7 like this? Guy selling the whole lot of them.  Canada B.C.


I cant tell if it says craftsman pro or poulan pro




5
Dolmar Makita / Re: Sachs Dolmar 122 rebuild
« Last post by Cut4fun . on Today at 06:54:23 am »
Very nice work. 
6
Dolmar Makita / Re: Sachs Dolmar 122 rebuild
« Last post by Yozhek on June 23, 2021, 05:33:03 pm »
Oil pump

The Dolmer 122 achillies heel, the oil pump is driven off the crank by a worm gear and pumps using a piston with a cam and spring mechanism, the flat on the end of the piston working as a rotary valve. The pump never wears out but the worm gear pair wear rapidly if engine lubrication is less than perfect and eventually the teeth strip resulting in a loss of bar oiling.

Dolmar modified the pump twice during the 122's lifetime, first the drive end of the pump was extended to form a support bearing (122S) and secondly the whole pump was moved from part of the crankcase to a seperate casting as in the later 123 saws (later 122S & 122SL).

As this saw is an early 122 model it has the early type pump, for which parts are no longer available. Lucky for me the pump was not in bad condition, the worm gear has some life left and fitting it on the crank in the opposite orientation presents unworn gear teeth to the pump pinion. The pump was showing wear but as only the later 122s type pump piston is available as a spare part i had to modify a 122s pump by removing the support bearing with a lathe and increasing the depth and diameter of the spring recess with a carbide drill.
[ Guests cannot view attachments ]
Thanks for reading :-)

Ade
7
Dolmar Makita / Re: Sachs Dolmar 122 rebuild
« Last post by Yozhek on June 23, 2021, 12:55:20 pm »
Crankshaft and crankcase.

The original crank looked good but was a little bent on the chain side
[ Guests cannot view attachments ]
Chainsawr to the rescue again, they had a NOS crank and proper 122 crankcase gasket. The crank was quite rusted but the big end was waxed and good, 15 minutes with some Jenolite got rid of the lumps of rust on the shaft and it was good to go  ;D
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
The 122 crank is a tight fit in the main bearing on the chain side and a sliding fit on the flywheel side, i find it easiest to warm the main bearing and oil pump worm gear and drop them onto the chain side of the crank first
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
Then warm the crankcase and drop the crank assy in
[ Guests cannot view attachments ]
Next warm the flywheel crankcase and add that main bearing, followed by the oil seal. The old stock gasket was hardened with age but a little grease softened it and helped it fit.
[ Guests cannot view attachments ]
Once the seal lip was greased it was time to assemble the crankcase. The crankcase halves can get slightly rotated in relation to each other resulting in a bit of misalignment on the cylinder base gasket face, this can be prevented by temporarily bolting down the cylinder to align everything before final tightening of the crankcase screws.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
Bottom end nearly done, thanks for reading.
Ade
8
Poulan / Re: Craftsman 358.356081 3.0 3.4
« Last post by Cut4fun . on June 23, 2021, 08:27:49 am »
She wasnt scuffed in ext side looks sweet.

Now maybe intake side might be suspect after seeing air filter.

So on hold parting it to see if can be a runner. But thats on back burner while doing other folks saws and fishing. ;)


9
Poulan / Re: Poulan check valve fix micro chainsaw
« Last post by Cut4fun . on June 23, 2021, 07:55:56 am »
One brass would budge so put duckbill on top like guys pic above using Threebond 1194.  Oils sweet now.

This one yesterday to try later. I was able to get the brass out. -  Think I know why the redneck fix for check valve for oiling is so much better. Black duckbill is what came out with small hole. Green is new.
Surprised to get one out instead of wad of goo.

10
To many dropped off to put in their own thread right now. 12 of them.    To get as many as can cutting.

Pages: [1] 2 3 4 5 6 ... 10