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I think I over greased scag deck spindles...??

14K views 17 replies 9 participants last post by  flintknapper  
#1 ·
I have a 2015 Scag Tiger Cat, was doing lubrication PM's and when I greased the deck spindles I greased until grease was coming out the opposite side the spindle of the zerk. Is this normal or did I blow the seal? I assumed it was the overfill release valve, because the grease always came out the opposite side the zerk was on...any help appreciated. Also, how often you guys grease your scags?
 
#4 ·
I grease mine every 25-35 hours I would guess. I pump it until it comes out the weep hole. I use a high speed grease. Lucas I believe, it's green. Expensive, so I only use it on the spindles and use regular heavy duty grease on everything else. I used to use the regular heavy duty grease on spindles, but it doesn't hold up well.
 
#9 ·
The grease 'relief valve' is opposite the zerk fitting and what you are seeing is normal as the others have confirmed. It IS possible to displace the upper spindle seal IF the relief valve gets clogged/fails.

Sometimes the grease will seep past the upper seal (if you're lucky) but the pressure can dislodge it too.

To prevent that from happening....I always 'stake' my seals when replacing spindles. Just 3 spots (120°apart).

I usually grease my spindles about every 20-25 hrs.

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#14 ·
The grease 'relief valve' is opposite the zerk fitting and what you are seeing is normal as the others have confirmed. It IS possible to displace the upper spindle seal IF the relief valve gets clogged/fails.

Sometimes the grease will seep past the upper seal (if you're lucky) but the pressure can dislodge it too.

To prevent that from happening....I always 'stake' my seals when replacing spindles. Just 3 spots (120°apart).

I usually grease my spindles about every 20-25 hrs.

View attachment 387574

View attachment 387575
How do you do that staking? I think one of my upper seals is blown (52"Vride2) and lowers leak as well... contemplating replacing with aftermarket v. Rebuild all the seals.. homeowner use only so no commercial beating daily. Was looking at Oregon spindles, have read good reviews. Thoughts?
 
#13 ·
the reliefs I have on my bob-cat spindles I wipe then pull the teet out of it to loosen it before I grease them ( to make sure they work ) , also I learned the hard way if you replace the reliefs they come in different pressures , I used some from my semi trucks old product pump and blew the seals out of the spindles as they were rated for 20 pounds not 2-3 pounds that the spindles use . and I push the teet back in when I wipe off the waste , 20-25 hr grease schedule , but I grease the spindles when I change blades as my zerks /reliefs are under the deck ( love my powered grease gun )
 
#16 ·
Like the BigFish said. Use a center punch right at the edge of the bore for the seal. I use Oregon spindles when I replace mine and they hold up just fine. I've had my Tiger Cub since new (2004) and 1600 hrs now (homeowner use). It's gone through the original spindles and one set of Oregon. I'm on my second set now. Not bad considering how many RPM the spindles turn an hour, let alone a half day of mowing.
 
#17 ·
I might add, when I was using the Oregon units, several years ago, they had a grease fitting in the side.
Howsomever, ya ain't gotta grease 'em.
They use sealed bearings, so no need to waste grease, right ?
 
#18 ·
I might add, when I was using the Oregon units, several years ago, they had a grease fitting in the side.
Howsomever, ya ain't gotta grease 'em.
They use sealed bearings, so no need to waste grease, right ?
^^^^

Correct mine (Oregon) have both Zerk fittings and a relief valve opposite that. I stake my upper seals in the event the relief valve gets plugged (which has happened to me) in which case the grease exits the top seal around the spindle shaft instead of pushing the entire seal out.