« on: April 12, 2020, 11:16:44 AM »
Not over impressed with build quality on these atm.
I like the overall look and layout of the latest models, but to me it's let down by a couple of things which could be vastly improved.
1: Roller bushes. These apparently made of a "low wear" plastic material which I guess are fine on a smaller 41, but they don't seem to be lasting very well on the 56's that I've seen so far. One which came back after three months had to have these bushes replaced as the chain was jumping. Yes it was used latter part of the season and was wet and muddy conditions. After cleaning all the muck out of the cam drives in the rollers, lubing them up and refitting the roller assembly with new bushes all seemed fine, only had a small amount of end play between rollers and bushes.
Roughly three months later the machine becomes difficult to turn, as one of the roller cam systems had jammed. Looking at the rollers it was apparent that it had loads of end play again, thus letting moisture and debris into the cam mechanisms once again. So not a good sign of things to come.
2: Chain: The chains used on these machines are of pretty cheap quality and go loose pretty quickly. I believe these are going to be upgraded if they haven't been already.
3: Rear sprocket and the way it's mounted to roller shaft is a bit naff, it's a thin sprocket with two flats machined into the sprocket centre hole, and two flats on the shaft. This is "held" in pace with a flimsy Circlip which has been known to come off during operation, especially if you have a lot of side play in the rollers.
Apart from a few other teething problems they had with the Blade brake clutch (BBC) and couple of other bits I really like the machines, but the roller parts, bushes sprocket fitment could do with a rethink IMO.
What are your experiences with the Hayter Harrier 56 Pro 579A / 579B ?
Oh, and below I've attached a couple of pics of the bushes taken from the first three months use. In the first one you can see the wear resulting in the chain going loose and jumping. In the second image you can see why so much end play in the rollers, because of the length difference in the bushes.