20G bumper/hitch assembly - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
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post #1 of 23 Old 03-11-2017, 11:43 AM Thread Starter
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20G bumper/hitch assembly

Hi - I would like to verify if the rear bumper/hitch assembly for the 20G is unique to this tractor? I have been trying to locate one for quite a while now without any luck. I see them once in a blue moon on crapbay but typically for the smaller G's (at least that is what is stated in the listing) and other models of Gravely ride-ons with narrower chasis. I guess the engine size/manufacturer and mufler placement also is a factor? I'm not looking for the rear impliment lifting type, just the standard ball hitch frame that also protects the engine from damage if you inadvertantly back up into something...
If someone knows where I may be able to acquire one, please let me know. I would like to be able to someday... tow a leaf vac trailer as well as connect a chain to drag logs, etc..

Thank You,
Bill

Last edited by Suribachi; 03-11-2017 at 11:49 AM. Reason: clarification
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post #2 of 23 Old 03-11-2017, 05:02 PM
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Re: 20G bumper/hitch assembly

Bill, All G series tractors use the same hitch and engine guard EXCEPT the 24G.

A 20G, 18G, 16G, 14G all use the same hitch and engine guard.



They look like this except mine has been extended to be farther from the engine.

The part numbers are found on page 32 here:

http://gravelymanuals.com/pdf/Pro_G_Part_Man_0495.pdf

There was a change early in the G series to the bars that attach the hitch to the axle blocks, the newest version has three holes at the axle block to provide for two different mounting locations.

The rear hitch plate has been the same way back, the engine guards have changed several times, but again, most late mode G tractors use the same parts. Only the 24G has the wider frame.

What parts are you missing? A picture would help.

Sheldon

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post #3 of 23 Old 03-11-2017, 05:11 PM
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Re: 20G bumper/hitch assembly

Here is the hitch plate:

Ariens Gravely 8123 Lawn Mower Garden Tractor Hitch Plate 08715551 019517 | eBay

Here is an engine guard, not in the best condition:

GRAVELY Engine Guard 16G 12G 14G 800 and 8000 series also Bolts on Hitch | eBay

The correct rails to connect it to the axle blocks are not currently on Ebay.

These parts do turn up on there from time to time, and someone on here may have some......

Sheldon

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post #4 of 23 Old 03-11-2017, 05:39 PM
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Re: 20G bumper/hitch assembly

There are three complete assemblies on eBay right now. Two have high shipping. This one has free shipping and buy it now and, in total, is the cheapest option.

Gravely Tractor Mower 812 Rear Hitch | eBay

This should fit your 20G.

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *


Challenge Met


Gravely 16G (1998)
Gravely 16G (1994)
Gravely 16G (1991)
Gravely 48" Snowblower and Cab (for the 91 16G)
Gravely 816S (1976)
Gravely 38" Snowblower (for the 816S)
Gravely 812 (1975)(mine since 1982)(Rolled over in 2016)
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post #5 of 23 Old 03-11-2017, 06:44 PM Thread Starter
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Re: 20G bumper/hitch assembly

Thanks everyone! I appreciate you all taking the time to respond and send links to the items on ebay for me. I kept seeing the setups on ebay and kept thinking they were the wrong size... I will order the setup tonight! Thanks again.

Regards,
Bill
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post #6 of 23 Old 03-11-2017, 09:20 PM
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Re: 20G bumper/hitch assembly

Quote:
Originally Posted by Mikey4 View Post
There are three complete assemblies on eBay right now. Two have high shipping. This one has free shipping and buy it now and, in total, is the cheapest option.

Gravely Tractor Mower 812 Rear Hitch | eBay

This should fit your 20G.
Mikey, the old style hitch will fit a 20G, but it will not stick out the back far enough for the new style G series engine guard. if you look at your G series tractor close, the side bars of the hitch are different from the older 800 and 8000 tractors.

Starting in 89 the later G tractors use a longer hitch side bar that has two mounting positions on the axle block. A forward position for use with the vacuum bagger and a rearward position for use with the engine guard.

This is covered in one of those little known addendums, Form 49187 dated 10-89. I will try to scan it and post it later.

Sheldon


Last edited by ATLANTIC CENTRAL; 03-11-2017 at 09:58 PM.
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post #7 of 23 Old 03-11-2017, 11:26 PM
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Re: 20G bumper/hitch assembly

Thanks Sheldon, I learned something. I assume you're saying the two bolts that mount to the axle blocks have three holes to choose from?

I have a few different hitch arm configurations. Some have two side holes for mounting one type of guard and some with three holes that seem more versatile for mounting other types of guards.





I even have one that widens out instead of narrowing around the motor. In fact, it allows the 16G dual exhausts to route inside the the hitch sides.

All, as you say, use the very same hitch plate.

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *


Challenge Met


Gravely 16G (1998)
Gravely 16G (1994)
Gravely 16G (1991)
Gravely 48" Snowblower and Cab (for the 91 16G)
Gravely 816S (1976)
Gravely 38" Snowblower (for the 816S)
Gravely 812 (1975)(mine since 1982)(Rolled over in 2016)
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post #8 of 23 Old 03-12-2017, 12:29 AM
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Re: 20G bumper/hitch assembly

Quote:
Originally Posted by Mikey4 View Post
Thanks Sheldon, I learned something. I assume you're saying the two bolts that mount to the axle blocks have three holes to choose from?

I have a few different hitch arm configurations. Some have two side holes for mounting one type of guard and some with three holes that seem more versatile for mounting other types of guards.





I even have one that widens out instead of narrowing around the motor. In fact, it allows the 16G dual exhausts to route inside the the hitch sides.

All, as you say, use the very same hitch plate.
Mikey, the top engine guard you pictured is the older one, it mounts outside and behind the hitch frame and works with the older hitch frame which "tucked" under the engine.

The black one is the 89 and later G series engine guard and it mounts inside the hitch frame, like in my picture, which requires the longer hitch frame side pieces as shown in the IPL I linked to earlier. Yes they have three holes on the axle end, which provide two different mounting distances.

And yes, there was a version just for the 16G dual exhaust tractors......

Sheldon

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post #9 of 23 Old 03-12-2017, 09:20 AM Thread Starter
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Re: 20G bumper/hitch assembly

So are the G series (outside from the 24) basically the same tractor other than the obvious engine size and the manufacturer? All/most parts in general, unrelated to the motor are interchangeable between the G models? I've owned a 12, 16 and 18 and now a 20 but I never owned them at the same time to allow a comparison between one size to the next. Thanks for the photos above as well, really helps.
I bought a hitch last night. Waiting to install same to see if I need the engine guard as well and if so, which style will work as I'm not sure of the age of my 20. Hour meter indicates 319-hours which I believe to be accurate considering the very nice overall condition of the tractor. The serial number is 00618225 and there is an additional tag below the serial tag which has the number 45543 on it?
Now I am considering whether to keep the rear turf tires or go with a set of super lugs. I had lugs on the 16 and 18 and liked them for mowing but can't remember how they worked in the winter...

Thanks Again.

Bill
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post #10 of 23 Old 03-12-2017, 10:25 AM
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Re: 20G bumper/hitch assembly

Bill,

Yes, 12, 14, 16, 18 and 20G Professional series tractors were all built on the exact same frame, transmission and chassis. There are a few minor differences beyond the engines.

18G and 20G tractors came with a number of upgrades/differences/variations. Here is a list:

18G/20G have larger tires front and rear.

ALL 18G/20G tractors came with hydraulic lifts, manual and hydraulic models offered in the 12G thru 16G models.

Wider rear rims were introduced on 18G and 20G sometime in the early 90's

18G/20G have longer steering arms and larger, more heavy duty tie rod ends.

Kohler twin powered 16G tractors did not have oil filters, 18G and 20G models did.

BUT, Kohler powered 16G models are actually 18 HP Kohler M18S engines, just like the 18G, less the oil filter.

Hour meters were standard on the 18G and 20G all along, later, after about 1995 they seem to have become standard on all tractors.

All of these tractors started out in the 80's with hand controls and right side brakes. All were later offered with left hand brakes, foot controls, optional dual wheel brakes and optional conversion back to hand controls.

Wider front rims were standard on all models starting in the early 90's.

Hope this helps. A review of the the parts book I linked to earlier, will show you the parts that are different and the parts that are the same. Example, there is a page for 18G/20G steering, and a separate page for 14G/16G steering.

Even though my tractor was built as a 16G, it has been fully upgraded to the 18G parts and specs except for the wider 18G rear rims and and tire sizes. Two things I don't feel offer any benefit anyway.

Personally, I would not mow with garden lug tires, and they are not good in snow from what I hear from others. Turf tires with chains, or something like All Trails are much better for snow.



This setup has plowed well over a foot of snow many times.

Sheldon


Last edited by ATLANTIC CENTRAL; 03-12-2017 at 10:30 AM.
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post #11 of 23 Old 03-12-2017, 11:30 AM
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Re: 20G bumper/hitch assembly

The black engine guard is available new from Gravely for around $75 I couldn't find a long G-SERIES hitch so I modify mine to match. See post #21 in the link below.

https://www.mytractorforum.com/24-gra...re-8179kt-8123

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my stuff
1987 8123 40"
1974 816 50", rear liftable hitch PTO, steering brakes, front PTO, snowplow, R&P steering
1977 817 50"
1983 8179KT 50", front PTO
1989 12G 40"
1995 18G 50" mulch kit, 3 can bagger steering brakes
1989 20G 50", rear liftable hitch PTO, steering brakes, front PTO
Pro8 Robin 9hp repower
Pro8

Dads stuff
1967 430 40", front PTO/30", rear liftable hitch
1978 812 40"
1990 16G 50"
1992 16G 50", snow plow, steering brakes
1989 24G 72"
2015 Gravely Atlas JSV3000
5665
Some walk behinds

my brothers stuff
1936 D Model
UFT Mountaineer 88E 30" deck, rotary plow
Pro16 40" 3-blade, 40" kidney bean,snow plow
Pro16 50" rigid mount, power brush
1996 16G 50"
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post #12 of 23 Old 03-12-2017, 12:55 PM Thread Starter
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Re: 20G bumper/hitch assembly

Thanks Sheldon and It4extreme for providing a comparison list and the guard still being available through Gravely/Ariens directly! I had thought the different model G's (12-20) were parts specific... No idea on how many parts/things I passed up buying because I thought it wouldn't fit, which in hind sight may have actually been a good thing for my bank account. Looks like without the extension brackets attached to the hitch assembly the guard will not fit. So I'll keep an eye out for the two extension brackets in the event I decide to get the guard as well.

I tried to find my tractor's date of manufacture based on the serial and model numbers with no luck and also did a search on here as well - did not find a list and what I read about Gravely serial numbers and inconsistancies got me mixed up. Nothing on GravelyManuals.com either. I figure it is a late 90's based on what I could decipher from other's serial number year dates identified and posted in threads on here.

Thanks Again,
Bill
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post #13 of 23 Old 03-12-2017, 01:32 PM
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Re: 20G bumper/hitch assembly

Quote:
Originally Posted by Suribachi View Post
Thanks Sheldon and It4extreme for providing a comparison list and the guard still being available through Gravely/Ariens directly! I had thought the different model G's (12-20) were parts specific... No idea on how many parts/things I passed up buying because I thought it wouldn't fit, which in hind sight may have actually been a good thing for my bank account. Looks like without the extension brackets attached to the hitch assembly the guard will not fit. So I'll keep an eye out for the two extension brackets in the event I decide to get the guard as well.

I tried to find my tractor's date of manufacture based on the serial and model numbers with no luck and also did a search on here as well - did not find a list and what I read about Gravely serial numbers and inconsistancies got me mixed up. Nothing on GravelyManuals.com either. I figure it is a late 90's based on what I could decipher from other's serial number year dates identified and posted in threads on here.

Thanks Again,
Bill
Bill, based on the pictures in your album, your tractor is pre 1994, likely about 1991, based on the model number. A GRAVELY dealer can look it up in the ARIENS system and tell you the date of manufacture and the date of delivery to the original dealer.

We know your tractor is pre 1994 because starting in 94 the hydraulic lift switched to the electric/hydraulic system, you have the system driven off the transmission.

It is a shame that the hitch and engine guard were removed from that tractor, it came with the black one with the longer side rails from the factory - why would someone remove it?

Sheldon

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post #14 of 23 Old 03-12-2017, 05:25 PM Thread Starter
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Re: 20G bumper/hitch assembly

Thanks Sheldon! I forgot that I had uploaded photos to the album when I got it! I'll check with the nearest Gravely dealer and see if he can tell me year and delivery date. 1991? - interesting info about the hydraulics change over in 94. Why did they go with electric/hydro? I feel pretty lucky to have found this machine in the condition it is in, cost me 3-grand with the snow blower and mower deck, but I have no regrets. The guy I bought it from said his dad bought it new and kept it at his camp upstate and seldom ever used it. You know how reliable these stories can be so I kind of took it with a grain of salt. But that being said, I just remembered he gave me all the original sales documents as well, I didn't think to see what year the sales brochure is and I think I remember seeing a PA dealership's stamp on the catalog. I'll check that out later tonight. Wonder if they are still around.
As far as the hitch, no idea why they would have removed it... I can't think of any reason they wouldn't want it on. I just checked the rear axle/bolt holes though and the paint is still intact and looks like new - doesn't look a hitch was ever installed? Credit maybe?
Thanks Again,
Bill
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post #15 of 23 Old 03-13-2017, 12:01 AM
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Re: 20G bumper/hitch assembly

Bill, there are various opinions as to why GRAVELY changed the hydraulic lift design, but no real direct knowledge.

Some think it was simply a cost savings measure, but as expensive as the electric lift pumps are, not real sure about that. One thing is for sure, the electric/hydraulic lift made the factory assembly of the tractor easier - way less parts.

Both systems have advantages and disadvantages. I don't really consider one better than the other, they are simply different.

The one main advantage to the electric lift is the fact that it works with the engine off.

Considering what that tractor and snow blower sold for new, you did fine. My tractor, bought new in 1996, was nearly a $10,000 investment with the 50" deck, snow plow, vacuum bagger and cart. A snow blower would have been nearly $2400 more.

Yes, hard to say why it did not have a hitch or engine guard, they were standard equipment by then. One more side note, if you ever want to put a snow plow on the tractor, you need a rear hitch frame. The brackets for the plow bolt on the axle blocks with the same bolt holes as the hitch frame, and the plow brackets will not be in the right location with a frame in place.

In this picture you can see the rear tab of the longer hitch frame and the position of the snow plow bracket. without a hitch frame, the plow brackets would be too far apart.



Sheldon

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