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Brush Hog Gear box lube #2586032 04/01/12 12:51 PM
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lilred67 Offline OP
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i replace the input shaft seal on my brush hog and i'm going to re-fill with gear oil. Owners manual calls for EP 90 gear oil. Would EP 85-90 or 85-140 be a suitable replacement gear lube? Or should i stick with the straight 90?

Last edited by lilred67; 04/01/12 12:52 PM.

1967 C-10 Chevy truck, 350 V-8
2002 ford F-250 4x4 superduty, 7.3l powerstroke w/183,000 miles
2018 Toyota Tacoma 4x4, 3.5l V-6 w/28,000 miles
Re: Brush Hog Gear box lube [Re: lilred67] #2586049 04/01/12 01:11 PM
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Rob_Roy Offline
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Assuming the gearbox doesn't run excessively hot, 80w90 or 85w90 should be fine. Keep an eye on the condition of the oil...it seems like those gearboxes love to collect moisture.


2016 Ford Expedition EL Platinum
2016 Ford Expedition XLT
1999 Ford F350, V10
Re: Brush Hog Gear box lube [Re: lilred67] #2586211 04/01/12 03:42 PM
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MolaKule Offline
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For Texas I would use

http://www.amsoil.com/storefront/svt.aspx

or an equivalent Mobil or a Redline gear oil.


"Dr. Larry Fleinhardt:
You know that it's considered unsolvable?
Charlie Eppes:
Well, certainly people who have failed to solve it might think that." From NUMB3RS
Re: Brush Hog Gear box lube [Re: lilred67] #2586218 04/01/12 03:47 PM
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JR Offline
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i run conventional 80w-90, 85/90w-140 in my box. that because i change it often because these thing seem to collect moisture.


97 F250HD 7.3 320K 01 Astro 220K
93 metroXFi 94.5K
01 Impala 300K
04 RTV900R 1150hrs


Re: Brush Hog Gear box lube [Re: lilred67] #2586501 04/01/12 08:20 PM
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lilred67 Offline OP
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thanks for your reply's. i filled it with Valvoline semi-syn 85/140 i had on hand.


1967 C-10 Chevy truck, 350 V-8
2002 ford F-250 4x4 superduty, 7.3l powerstroke w/183,000 miles
2018 Toyota Tacoma 4x4, 3.5l V-6 w/28,000 miles
Re: Brush Hog Gear box lube [Re: lilred67] #2590921 04/05/12 02:34 PM
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Jim Allen Offline
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I used LE-607 in mine, from Lubrication Engineers in Texas. No longer produced but it was a straight 90 grade designed for industrial gearboxes.


Jim Allen
Keepin' the Good Old Days of Four Wheeling Alive
Re: Brush Hog Gear box lube [Re: Jim Allen] #2594446 04/09/12 11:31 AM
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fpracha Offline
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Originally Posted By: Jim Allen
I used LE-607 in mine, from Lubrication Engineers in Texas. No longer produced but it was a straight 90 grade designed for industrial gearboxes.
The Duolec LE 1605 replaces the LE 607.

Re: Brush Hog Gear box lube [Re: fpracha] #2597765 04/12/12 01:54 PM
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Dieselbob Offline
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Is the moisture coming from the machine being stored outside, or is it just drawing condensation?

Re: Brush Hog Gear box lube [Re: lilred67] #3393863 06/10/14 09:51 AM
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dixon700 Offline
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What about synthetic 75w-90?


04.5ram CTD lots of parts delvac15w-40 just delvac next time Donaldson elf7349 02 elantra gt castrol edge10w-30 oem filter
Re: Brush Hog Gear box lube [Re: lilred67] #3394366 06/10/14 08:14 PM
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jhellwig Offline
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Corn head grease mixed with regular grease. You can run with a seal out with that.


Sparks fly from my fingers.

1995 Chevy K2500 Suburban lt 5.7
2014 Toyota Sienna
1983 Chevy K5 350
Re: Brush Hog Gear box lube [Re: lilred67] #3394848 06/11/14 01:10 PM
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ironman_gq Offline
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cornhead grease is pretty fluid when it warms up but does stiffen up when it cools off, it would keep it from drooling as much from a leaky seal when the machine is sitting. Not sure how well it would lubricate the unit in this application.

Re: Brush Hog Gear box lube [Re: lilred67] #3398138 06/15/14 10:52 AM
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SuzukiGoat Offline
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We run mystik 80w90.

I had a 40 year old bush hog that leaked a half quart an hour, grease fitting and four tubes of grease later...the box outlast four belly repairs.


2003 Nissan Xterra 4x4 M1 HM 10w40
2001 Toyota 4runner 4x4 M1 0w40
2016 Yamaha YXZ1000R VR1 20w50

Re: Brush Hog Gear box lube [Re: lilred67] #3398493 06/15/14 08:19 PM
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cronk Offline
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I've been running 85w140. Those boxes take a beating, the thicker the film strength, the better!


2008 Ford F350
2008 Kia Spectra
2011 Nissan Quest
1986 Pontiac Trans Am
1940 Ford 9N Tractor
Amsoil lubes and filters!
Re: Brush Hog Gear box lube [Re: lilred67] #3413205 07/03/14 06:50 AM
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Alltherage Offline
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our bush hog finish mower has a bad bottom seal. I switched from gear oil to JD cornhead grease and it improved in terms of leakage. It's changes from a soft solid when cold to a gear oil type substance when warm. I researched it quite a bit before using it and see no issues at all. It still leaks though, so now I want to mix the regular grease in with it or go to 100% grease. Seems that many others have had success with that when confronted with a really bad seal.

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