Hello Leo, I think we bought the saw in Australia in the 1990s. It's only used for ripping, either in an Alaskan mill or freehand ripping to a chalk line. Very reliable, I serviced the carby for the first time recently. The anti-vibration works well. Unfortunately I can't find any non-genuine AV handle parts online, and all the non-genuine 070s have no AV at all.
Hi Peachtree, in the video I'm using a 3-legged gear puller to do the hard pulling. They're a pretty common workshop tool for removing gears, pulleys, bearings etc.. I often make pullers for special jobs, such as taking sealed bearings off the end of motor shafts, but this time I borrowed one from a neighbour. If yours isn't coming off with a puller, it could have some corrosion. I'd try penetrating oil, some careful heat, and a puller that fits the drum well. Good luck!
I've never worked on an 070 but my understanding is that the main difference is cylinder displacement: 090 is significantly more powerful than 070. They both use the same workshop manual. However higher power always has a cost in stress and wear!
The clutch body (with the weights and springs) is tight on the shaft, thus needing the gear puller to remove. The clutch drum (with the sprocket) has the needle roller bearing between it and the shaft. The needle roller bearing slips onto the shaft easily (as you can see in the video). The clutch drum slips over the bearing easily too, but should have very little play when installed. If the drum is loose on the bearing and shaft (shakes back and forth after installation), then hopefully (and usually) you have a worn bearing hole in the drum which can easily be replaced. Worse cause is a worn crankshaft, which can't easily be replaced. Checking and greasing the bearing is essential to avoid wearing the shaft.
Hi. I have an 070 with they same handle. Can i ask you how old is your chainsaw? Thanks
Hello Leo, I think we bought the saw in Australia in the 1990s. It's only used for ripping, either in an Alaskan mill or freehand ripping to a chalk line. Very reliable, I serviced the carby for the first time recently. The anti-vibration works well. Unfortunately I can't find any non-genuine AV handle parts online, and all the non-genuine 070s have no AV at all.
Bruce what tool are you using to remove the clutch drum? Mine seems to be jammed .
Hi Peachtree, in the video I'm using a 3-legged gear puller to do the hard pulling. They're a pretty common workshop tool for removing gears, pulleys, bearings etc.. I often make pullers for special jobs, such as taking sealed bearings off the end of motor shafts, but this time I borrowed one from a neighbour. If yours isn't coming off with a puller, it could have some corrosion. I'd try penetrating oil, some careful heat, and a puller that fits the drum well. Good luck!
What is the differences between the 070 and 090 ??
I've never worked on an 070 but my understanding is that the main difference is cylinder displacement: 090 is significantly more powerful than 070. They both use the same workshop manual. However higher power always has a cost in stress and wear!
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How tight is the bushing on the shaft? The bushing being the peice between the clutch and shaft.
The clutch body (with the weights and springs) is tight on the shaft, thus needing the gear puller to remove. The clutch drum (with the sprocket) has the needle roller bearing between it and the shaft. The needle roller bearing slips onto the shaft easily (as you can see in the video). The clutch drum slips over the bearing easily too, but should have very little play when installed. If the drum is loose on the bearing and shaft (shakes back and forth after installation), then hopefully (and usually) you have a worn bearing hole in the drum which can easily be replaced. Worse cause is a worn crankshaft, which can't easily be replaced. Checking and greasing the bearing is essential to avoid wearing the shaft.
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