Zedde

I have an old Jensen A521 and have some issues with the roller speed. With speed adjuster opened it will spin at full pelt which is way too fast for anything larger. I can adjust the speed down but it will stop or the rollers will just start crawling round after a short time. Oil is full, filter is clean...... I'm wondering if it is the pump that cannot build enough pressure for the slow speed setting ? Any help would be brilliant

Morning all, I am going to be having my chipper hopper modified at some point and will have to move the hydraulic parts currently bolted to the side of the hopper which then causes an issue with the bar based forward/reverse/stop. Am I able to fit push buttons to control the rollers instead?, I found some reference to the control unit supporting buttons in an A530 manual i found but unsure if this applies to my machine or what I want to do. Any help would be thankfully received.

Thanks wefixit!. So you are saying most people don't even bother shimming/checking the correct gap unless they are fitting new blades?.

Thanks for the info, So I need a set of these shims from Jensen then. I havnt had chance to look at my specific chipper but found this in the A530 manual which I believe is the newer model and very similar (see attached pic). So the spacer in the diagram would be the shim you speak of which you change size to keep the blade edge at a certain distance from anvil.......I don't see a specific measurement for what the spacing should be between blade edge and anvil edge tho, I would assume I use a feeler guage to check it and adjust the shim thickness till its the correct gap?. Thanks for all info, I like to get things 100% in my head before I attempt anything :).

Morning all. I have just taken delivery of my first chipper, an old Jensen A528. I am looking to learn how to do all the maintenance myself and am currently trying to find some information on blade changing. Would anyone have some good documentation that will help me out with this?, In my searching I noticed there is specific spacing and skew to measure when fitting blades. Is there any special spacers/devices I need or can buy to make the job easier?. I have torque wrench and good set of tools available. Thanks in advance for any info.

TuscanPhil....That isn't the same model, Runleader make lots of different tachs but you need the one I posted as it is the one with .5second refresh rate. Ive tested it on my echo long reach and ms440 so far and it seems absolutely bob on.....I don't need to wrap the wires around the HT lead as it picks up a strong pulse from just laying the cable near the sparkplug/HT lead. Very happy with the purchase considering price and how rarely it will get used.

I recently did a lot of digging around all the cheap Chinese offerings looking for something budget and found this one that seemed to fit the bill, £11 delivered in 2weeks. .5second refresh rate: https://www.aliexpress.com/item/RL-HM026-Waterproof-Re-settable-Inductive-Tach-Hour-Meter-For-Snowmobile-Skis-Motor-Bike-Go-Kart/32811630797.html?spm=a2g0s.9042311.0.0.bNgGDB