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Maxi/Mini Paw's rotating slowly

Dirty Water

LawnSite Fanatic
Location
Redmond, WA
I just did a quick renovation call for a landscaper that is redoing a 20 year old landscape.

Added two drip zones, moved a bunch of heads..the usual. Anyways, I found about 5 impact sprinklers that refused to move (they would hammer away, but not go anywhere).

I didn't feel like messing with them, so I replaced them for rotors...Any idea why they would do that?
 

Wet_Boots

LawnSite Fanatic
Location
metro NYC
Could be dirt or debris. It might also just be worn out bearing washers. A certain amount of bearing friction is necessary for an impact head to work. Without it, there will be no rotation. I remember old brass impact heads with the same problem. Makes you say "Hmmmmm" the first time you see it.
 

Grassmechanic

LawnSite Silver Member
Location
S.E. Michigan
As Wet Boots said it could be a bearing washer. Or a small stone in the impact arm. Or a burr on the part that the impact rotates on.
 

Wet_Boots

LawnSite Fanatic
Location
metro NYC
Sometimes, with brass impact heads, you would see the non-rotating impact heads when a homeowner noticed that the reversing trip mechanism was sticking, and got the bright idea of getting out the good ol' can of WD-40 ~ if only the trip mechanism got sprayed, all well and good, but if the spray got into the spindle bearing washers, and eliminated the friction, good-bye impact head.
 
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