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#3866740 - 09/27/15 09:56 AM mower deck spindle grease
mech_tech Offline

Registered: 08/17/15
Posts: 49
Loc: Louisiana
I tried searching around, but it seems there isn't much info on specifically what greases work best for mower deck spindles. I am currently using what little is left in my grease gun from my last job, which they used Mystik JT-6. The supplier they used is an hour away and the only local place that carries it is tractor supply, which is kind of hit and miss with what they stock. Is there another grease that would be ideal for the 100 degree summer days? I am tempted to try the supertech grease but am afraid it might separate in the high temperatures. I suspect a regular lithium grease is preferred for this situation. Any good grease to try that won't separate at high temps and is compatible with the mystik? My local wal-mart carries the Lucas red and tacky, as well as valvoline which autozone also carries. It would mostly be used to snapper rear engine riders in case that makes a difference.

#3866760 - 09/27/15 10:15 AM Re: mower deck spindle grease [Re: mech_tech]
Ramblejam Offline

Registered: 11/05/13
Posts: 3210
Loc: Kentucky
Grease is cheap. Parts & labor are expensive.

Deere SD Polyurea would be available at your local dealer. Use it for everything.

#3866802 - 09/27/15 10:53 AM Re: mower deck spindle grease [Re: mech_tech]
ShotGun429 Offline

Registered: 12/09/04
Posts: 426
Loc: Dayton,Ohio
Its more important that the Spindles are lubed reguarly than what grease you use. The failures i see are lack of mantaince.

#3867178 - 09/27/15 05:24 PM Re: mower deck spindle grease [Re: mech_tech]
gman2304 Offline

Registered: 08/11/11
Posts: 3055
Loc: n.c.
Iv'e used Valvoline Crimson EP for years. My 17 year old JD LX188 still has it's original deck bearings/pulleys. The deck is almost silent and smooth as silk.

#3867378 - 09/27/15 08:07 PM Re: mower deck spindle grease [Re: mech_tech]
Rob_Roy Offline

Registered: 10/26/08
Posts: 974
Loc: Northern, NY
Mystik JT-6 is available at my local WalMart. Might be working checking again if that is what you want to use.

2016 Ford Expedition 3.5 Ecoboost
2015 Subaru Legacy 3.6
2014 Subaru Outback 2.5
1999 Ford F350, V10

#3867429 - 09/27/15 08:28 PM Re: mower deck spindle grease [Re: mech_tech]
dlundblad Offline

Registered: 09/30/13
Posts: 10033
Loc: Indiana
I have used a few various supertech greases with good luck.

I use it on the Kubotas, (mower deck all the way to the loader on the big guy.) as well as the rear mount implements.
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980

#3867769 - 09/28/15 06:26 AM Re: mower deck spindle grease [Re: mech_tech]
Lubener Offline

Registered: 01/22/11
Posts: 2576
Loc: N.Ohio
For years I have used multi purpose grease and never had a spindle go bad. 1973 Bolens and 1985 Craftsman. Important factor is that it is greased regularly.Don't go hog wild and pump 10 shots in because it will overflow under a belt cover and get all over the belt.

Edited by Lubener (09/28/15 06:28 AM)
The "thinking" man's friend.

#4075491 - 04/21/16 12:23 PM Re: mower deck spindle grease [Re: Lubener]
Majsmith Offline

Registered: 06/18/06
Posts: 15
Loc: Oneonta, Alabama
I used the JD Polyurea grease for a few years on my 4310s loader pins and ujoints, and on the spindles on my 345 mower deck. After two spindle bearing failures I switched to the Mystic JT6 grease for the last 14 years....ZERO bearing failures.

The Polyurea does resist washout a bit better, but its not a factor with my lube schedule. I've since switched to a JDs HD Moly grease for my loader pins and chassis.


2009 Toyota Tacoma V6 Prerunner
2014 Cadillac CTS Vsport 3.6L V6 Twin Turbo
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John Deere 4310
John Deere X758

#4078190 - 04/24/16 01:28 PM Re: mower deck spindle grease [Re: mech_tech]
MCompact Offline

Registered: 07/21/02
Posts: 4113
Loc: KY
So what's the consensus on greasing frequency? Every 5 hours? 10?
2014 M235i
1999 Wrangler Sahara
1995 318ti Club Sport

2016 i3 REX
2009 Cooper Clubman

2009 328i

Buy what makes you smile...

#4078218 - 04/24/16 02:00 PM Re: mower deck spindle grease [Re: mech_tech]
mjoekingz28 Offline

Registered: 11/21/07
Posts: 3979
Loc: United States of America
Two pumps a year?

#4078402 - 04/24/16 05:30 PM Re: mower deck spindle grease [Re: mech_tech]
old1 Offline

Registered: 01/04/11
Posts: 1001
Loc: Columbus Nebraska
I was a Snapper dealer for many years, and actually RARELY ever put grease in the zerk for the blade spindle bearings. Why? because the Large ball bearings are sealed both sides , and I couldn't see how any grease could get into them anyway. Also in over 20 years as a dealer, I don't ever remember replacing any snapper spindle bearings. Other makes, yes.
2017 Nissan Frontier 4.0 5w30
1965 Mustang 200 c/4 10w30 QS defy
1964 Ford Ranchero 302 c/4 15/40 Delo
1929 ford model A No filters, and 15/40 oil

#4407717 - 05/18/17 09:08 AM Re: mower deck spindle grease [Re: MCompact]
5AcresAndAFool Offline

Registered: 12/18/16
Posts: 421
Loc: Indiana
Originally Posted By: MCompact
So what's the consensus on greasing frequency? Every 5 hours? 10?

I have a JD Z720a and its easy to grease the spindles on it. I do so every 5 to 15 hours, usually give it a pump or two, then once in a while I give it 5 or so pumps to flush it out.

I think JD spec is every 50 hours.

#4407749 - 05/18/17 09:50 AM Re: mower deck spindle grease [Re: mech_tech]
Oldmoparguy1 Offline

Registered: 01/21/05
Posts: 5612
Loc: Charlotte, NC
My mower deck spindles have no zerks. There is nothing to grease. I've had to replace spindles because of hitting obstructions and breaking the casting, but even then, the bearings and shafts were fine. This on a 20 y/o Poulan Pro 42" rider.
A Randomly Selected Thought For The Day:
If Noah had used Zip, he could have used a smaller boat.

#4407752 - 05/18/17 09:56 AM Re: mower deck spindle grease [Re: mech_tech]
SHOZ Offline

Registered: 06/28/03
Posts: 5746
Loc: Illinois
I have John Deere with two deck spindles. they said to not over grease which I promptly did and blew the seals on one of them. Years later I finally had to rebuild one of the spindles as it was making so much noise. It has two bearings in it and the grease zerk simply pumps grease into the 2" void between them.

But the bearings were cheap and it was not hard to rebuild it. The other is still good as new. Mower is 18 years old now.
2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual

#4408487 - 05/19/17 08:22 AM Re: mower deck spindle grease [Re: mech_tech]
Chuckh Offline

Registered: 10/26/15
Posts: 10
Loc: Pittsburgh
I have seen Mobile Polyrex EM grease. It is a polyurea grease.

They are also claiming that it is compatible with lithium greases (I guess telling you in a way that the two won't harden or something bad if they get mixed together). The stuff I found is Mobil POLYREX EP 2 and it is $51.35 per case. That is cheap in my opinion and free shipping if you order $75 or more worth of stuff. I have read in various places that Polyrex EM is very good grease and thta polyurea greases don't build up as much like other greases after the oil is depleted. This is the stuff I ordered and it will last me a long time:

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