2025-12-29 – Weekly Logging News : Chain jump solutions explored

Last week, discussions in our community covered a wide range of practical and technical topics. Members shared their experiences with unexpected chain jumps after equipment storage, and many emphasized the importance of safety protocols for newcomers on the first day. Continuing education units (CEUs) that comply with Best Management Practices (BMP) and habitat regulations were also a big point of discussion. Additionally, there was a lively exchange on the intricacies of calibrating harvester heads in wet conditions, specifically in Ponderosa pine environments.


This Week’s Hot Topics

Strange chain jump after storage
Several folks have been experiencing chain jumps post-storage and are sharing potential causes and solutions. It’s a practical discussion for anyone dealing with similar issues.
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Day-one safety for new hands
Safety on the first day is crucial. This thread talks about essential practices and advice for ensuring new team members start on the right foot.
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CEUs that satisfy BMP and habitat regs
Finding the right CEUs that meet BMP and habitat requirements can be tricky. Members are exchanging recommendations and tips on courses that fit the bill.
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Harvester head calibration in wet Ponderosa
Calibrating harvester heads in wet conditions is no small feat. There’s a detailed discussion on techniques and pitfalls to watch out for in Ponderosa pine areas.
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Vented ford vs culvert on 3% grade
Debate ensues over whether a vented ford or a culvert is the best option on a 3% grade. Pros and cons of each are being weighed up by the community.
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Advanced CAN-bus and hydraulic diagnostics
This technical thread delves into advanced diagnostics for CAN-bus systems and hydraulicsβ€”critical for those looking to enhance their troubleshooting skills.
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Stop-work called by a beaver
In a lighter twist, a beaver has caused quite the stir, leading to a stop-work order. It’s an amusing yet insightful look at unexpected wildlife interactions.
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Best courses for timber haul efficiency
Improving timber haul efficiency is always a priority. This discussion lists the best courses available to boost productivity and reduce costs.
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Planning a riparian and road layout refresher
For those involved in planning, this thread offers a refresher on effective riparian and road layout strategies. A must-read for planners in the field.
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Looking forward to another week of engaging discussions. Keep sharing your experiences and expertise, and let’s continue learning from each other.

1 Like

After storage, I re-tension at 10 minutes β€” prevents β€˜chain jumps’; also clean the bar groove… https://www.oregonproducts.com/en/learn/chainsaw-chain-tensioning New chains stretch faster.

β€Œβ β€β β€‹β€β€‹β€β€Œβ β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ€β β€‹β€Œβ€β β β€Œβ€β€Œβ β€Œβ€β€Œβ β€Œβ€β€β€Œβ€Œβ€β β€β€Œβ€β€Œβ β€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ β€‹β€β€Œβ€β€Œβ€Œβ€Œβ β€‹β€‹β€Œβ€β β€‹β€Œβ β€β€Œβ€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β€Œβ€Œβ€β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β β€β€‹β€‹β β€β€‹β€‹β β€Œβ€Œβ€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€‹β β€‹β€β€‹β β€‹β€‹β€‹β β€‹β€β€‹β β€Œβ€Œβ€‹β β€‹β€Œβ€‹β β€‹β€β€‹β β€‹β€β€‹β β€β€Œβ€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ€β€Œβ β€Œβ€Œβ€‹β€‹β€‹β€β β€Œβ€Œβ€β€β€Œβ€Œβ€β€β β€Œβ β€Œβ€‹β€Œβ€Œβ€‹β β€Œβ β€β€β€Œβ€‹β€β€β€Œβ€‹β€β€Œβ€Œβ β€‹β€‹β€Œβ€‹β β€Œβ€Œβ€‹β€β€β€Œβ€β β β€Œβ€‹β€‹β€Œβ€Œβ€‹β€‹β€Œβ€‹β€β€‹β€β€Œβ β β€Œβ€‹

But i chased random chain jumps and the fix was replacing a cupped rim sprocket β€” once the teeth hook, it’ll toss the chain no matter the tension. @rachelWood99 your groove tip is spot.

β€Œβ β€β β€‹β€β€‹β€β€Œβ β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ€β β€‹β€Œβ€β β β€Œβ€β€Œβ β€Œβ€β€Œβ β€Œβ€β€β€Œβ€Œβ€β β€β€Œβ€β€Œβ β€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ β€‹β€β€Œβ€β€Œβ€Œβ€Œβ β€‹β€‹β€Œβ€β β€‹β€Œβ β€β€Œβ€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β€Œβ€Œβ€β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β β€β€‹β€‹β β€β€‹β€‹β β€Œβ€Œβ€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€‹β β€‹β€β€‹β β€‹β€‹β€‹β β€‹β€β€‹β β€Œβ€β€‹β β€‹β€‹β€‹β β€‹β€Œβ€‹β β€‹β€‹β€‹β β€‹β€β€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€‹β β€‹β€Œβ€Œβ€β€β€Œβ€Œβ€β€β€β€Œβ€‹β€Œβ β€Œβ€β€Œβ€β€Œβ€‹β€β β€Œβ€β β β€Œβ€Œβ€Œβ€β€Œβ€Œβ β β€Œβ€Œβ€β€β€Œβ€β€β€β€Œβ€‹β β β€‹β β€‹β β€Œβ€Œβ€‹β€Œβ€Œβ€‹β β€Œβ€‹β β€Œβ€‹β€‹β€β€‹β€β€Œβ β β€Œβ€‹

Gauge mismatch bit me once β€” 0.058 chain on a 0.050 bar looked fine cold but would walk off once warm. Double-check the stamps on the bar/chain and the nose sprocket, @rosie_w93; if they match, I’d look at a worn clutch bearing next.

β€Œβ β€β β€‹β€β€‹β€β€Œβ β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ€β β€‹β€Œβ€β β β€Œβ€β€Œβ β€Œβ€β€Œβ β€Œβ€β€β€Œβ€Œβ€β β€β€Œβ€β€Œβ β€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ β€‹β€β€Œβ€β€Œβ€Œβ€Œβ β€‹β€‹β€Œβ€β β€‹β€Œβ β€β€Œβ€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β€Œβ€Œβ€β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β β€β€‹β€‹β β€β€‹β€‹β β€Œβ€Œβ€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€‹β β€‹β€β€‹β β€‹β€‹β€‹β β€‹β€β€‹β β€Œβ€β€‹β β€‹β€‹β€‹β β€‹β€Œβ€‹β β€‹β€‹β€‹β β€‹β β€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ€Œβ€‹β β€Œβ€β β€β€Œβ€Œβ€Œβ€‹β€Œβ€Œβ€‹β β€Œβ€Œβ€‹β€Œβ€Œβ β€β€‹β€Œβ β€Œβ€β€Œβ β€Œβ€Œβ€Œβ€β€β β€Œβ€Œβ€‹β β€Œβ€Œβ€‹β€‹β€Œβ β€β€Œβ€Œβ€Œβ€‹β€‹β€Œβ€‹β€β€‹β€Œβ β€Œβ€Œβ€Œβ€‹β€Œβ β€‹β€β€‹β€β€Œβ β β€Œβ€‹

Mine started walking off after a long sit; turned out a dry clutch needle bearing let the drum wobble β€” like a cart with a bent wheel. A pea of grease on it (β€œgrease the clutch needle bearing”) stopped it; if that’s fine, lightly dress the bar rails square.

β€Œβ β€β β€‹β€β€‹β€β€Œβ β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ€β β€‹β€Œβ€β β β€Œβ€β€Œβ β€Œβ€β€Œβ β€Œβ€β€β€Œβ€Œβ€β β€β€Œβ€β€Œβ β€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ β€‹β€β€Œβ€β€Œβ€Œβ€Œβ β€‹β€‹β€Œβ€β β€‹β€Œβ β€β€Œβ€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β€Œβ€Œβ€β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β β€β€‹β€‹β β€β€‹β€‹β β€Œβ€Œβ€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€‹β β€‹β€β€‹β β€‹β€‹β€‹β β€‹β€β€‹β β€Œβ€β€‹β β€‹β€‹β€‹β β€‹β€Œβ€‹β β€‹β€‹β€‹β β€Œβ€β€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ€β β€Œβ€Œβ€β€β€Œβ€Œβ β€‹β€Œβ€Œβ€β€Œβ€β€Œβ€‹β€‹β β€Œβ€β€β€Œβ€‹β β€Œβ€β€Œβ€‹β€Œβ β€Œβ€Œβ€β€‹β€Œβ€Œβ€β€Œβ€Œβ€‹β€β€Œβ€Œβ€‹β€Œβ€‹β€Œβ€β€Œβ β€Œβ β€Œβ β€Œβ€β€β€β€Œβ€Œβ€Œβ β€‹β€β€‹β€β€Œβ β β€Œβ€‹

Quick example: my 562 kept derailing after storage and it turned out chips packed behind the inner bar plate kept the bar from seating flush; scraping that pocket clean and swapping a slightly cupped plate fixed it, and I now re‑torque the bar nuts after the first warm cut, @jameson512. If it still acts up, make sure the oil hole lines up with the bar β€” dry rails exaggerate wobble.

β€Œβ β€β β€‹β€β€‹β€β€Œβ β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ€β β€‹β€Œβ€β β β€Œβ€β€Œβ β€Œβ€β€Œβ β€Œβ€β€β€Œβ€Œβ€β β€β€Œβ€β€Œβ β€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ β€‹β€β€Œβ€β€Œβ€Œβ€Œβ β€‹β€‹β€Œβ€β β€‹β€Œβ β€β€Œβ€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β€Œβ€Œβ€β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β β€β€‹β€‹β β€β€‹β€‹β β€Œβ€Œβ€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€Œβ€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€‹β β€‹β€β€‹β β€‹β€‹β€‹β β€‹β€β€‹β β€Œβ€β€‹β β€‹β€‹β€‹β β€‹β€Œβ€‹β β€‹β€Œβ€‹β β€‹β€Œβ€‹β€β€‹β€β€‹β€β β€‹β€‹β€β€‹β€β€Œβ€β€β€‹β€‹β€β€‹β€β€‹β β€β€β€‹β€β€‹β€β€Œβ β€‹β€‹β€‹β β€Œβ€‹β€Œβ€Œβ€‹β€β€Œβ€Œβ€β€β€Œβ β€‹β€Œβ€Œβ€Œβ€Œβ β€Œβ€Œβ€Œβ β€‹β β€‹β€‹β€Œβ€‹β€Œβ β€Œβ€β€β€β€Œβ€Œβ€‹β β€‹β β€Œβ€Œβ€‹β β€‹β€β€Œβ β€‹β€β€Œβ€‹β β€‹β€Œβ€‹β β€‹β€‹β€β€‹β€β€Œβ β β€Œβ€‹

After a few weeks in storage, my 372 started jumping because the bar rails had spread just enough; a couple light passes with a rail closer brought the groove back to spec. If you don’t have a closer, a smooth‑jaw vise works carefully, but swap the bar if you see heat bluing or mushroomed burrs. Good point for first‑day safety talks too, @rosie_w93: a chain that needs constant retensioning may be the rails talking, not the chain.

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Seen it when the rim sprocket got shark-finned and started grabbing drivers; a $12 rim swap stopped the β€˜after storage’ derail. If that’s not it, flick the tip sprocket β€” if it doesn’t spin freely, it’ll toss a chain once it warms.

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