Scenario: one end of the edge is clearly lower than the other after a few storms. Direct answer: look at the plow’s set-up and the route before blaming the edge. The table lists common causes from shop practice. I give no measurement limits; use your plow manual’s values.
| Observation | Likely cause | Check | Fix |
|---|---|---|---|
| Same end wears on every truck | Route feature such as a crown or a hazard on one side | Map where the wear starts | Mark the hazard; swap edge direction if reversible |
| One truck only | Truck lean or uneven suspension | Park on level ground; compare front ride height left and right | Repair suspension or springs |
| Wear on the trailing end of the angle | Plow angled too far for the surface | Angle setting and driver habits | Reduce angle where possible |
| Plow sits tilted when lowered | Worn pins, bushings or lift chain | Slop at mount and lift points | Replace worn parts |
| One shoe lower than the other | Shoes set unevenly | Measure both shoes to the ground | Reset to match |
| Wear moves with each new edge | Moldboard bend or twist | Straightedge along the moldboard | Repair or replace the moldboard |
Order of checks
One end wearing faster is a geometry problem before it is a material problem. Check in this order.
- Park on level ground, lower the plow flat and look from the front and rear. A plow that is not level will wear one end first.
- Measure edge height at both ends and the middle, and record it. Three readings describe the wear pattern; two do not.
- Check shoes, pins and chains. A worn shoe or a slack chain changes the angle of contact.
- Check the truck stance. Suspension or tyre differences change the plow angle more than most crews expect.
- Compare with your last log and with other trucks on the same route. A single truck points at the truck; several point at the route.
Do not do this
- Do not just swap the edge end for end without checking the cause; the problem returns on the other end.
- Do not tighten bolts harder to correct a tilt.
When the cause is still unclear
If you have checked each item and the wear remains uneven, put the plow on level ground and measure the moldboard bottom against a straightedge along its length, and compare left and right at the mount. Take photographs from the front and the side with a tape visible. Send the photographs and your log to the plow dealer. A dealer can often tell from the images whether the frame, the moldboard or the mounting geometry needs attention.
What to record
Log the heights, the likely cause you found and what you changed. If wear stays uneven after fixing the obvious items, ask the plow dealer or maker about the frame geometry, and show them your measurement log.
Boundary: diagnostic guidance only; follow the plow manual and safety rules. No tolerances are given.
Further reading on this site.
Our new blades seem to wear faster after a route change. What should we compare first? ↗How should we compare blades when one trial ends before the edge wears out? ↗Carbide snow plow blades ↗Bent Cutting Edge After a Curb Strike: Straighten, Weld or Replace? A Decision Tree ↗Rusted-In Cutting Edge Bolts: A Removal Sequence and What Not to Do ↗Plow Maintenance by Hours and Events: A Schedule Template for Edge, Hardware and Hydraulics ↗
