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Old 10-26-2010, 08:32 PM   post #1 of 12
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Default 16G Service Questions

Hello all,

It's been a while since I last posted. Spent the summer playing with Newports.(The car, not the cigarette)

I'm servicing a 16g for a friend and have some questions. I've always been a walk behind guy, so the riders are new territory.

Here's what we have:
16G with Kohler Magnum twin, 50" deck and flywheel driven rear triple bagger.

Engine #'s:
Model: blank (there is a Kohler Magnum 16 decal on the air cleaner and engine cover-all Gravely red)
Spec: 24544
Serial: 1713408886

Tractor #'s: (two tags under the hood)
Serial:00596799
Second Tag: 43870

Mower Deck:
Serial: 05156098

This is a near mint, low use machine that my friend bought from the widow of the original owner. He obviously spent more time cleaning/maintaining it than he did using it. When we picked it up last fall, I could tell that she was disappointed that her sons had not kept it as clean as her husband had.

I have downloaded the owner's, service, and parts manuals for it but have yet to read through them all. I like to have real world experience/knowledge as well.

Now for the questions:

1. What vintage is the machine? (I believe it was bought new as a package with the deck and bagger)

2. I'm assuming that engine and trans. oils are two separate things. What should I use for each?

3. Should I change/drain the hydraulic lift fluid and filter? And if so, what is the best way?(I think my friend has used it more this past season than the PO did since new)

4. Besides the basic,(air+fuel filters, plugs, oils, and greasing all fittings) what else should I look for?

The unit starts and runs very well and reliably as it is, no real issues. The hydraulic lift works fine as well.

I have already replaced the deck belt and sharpened what I believe are the original blades.

It has the lever control for fwd/rev, and the foot brake both on the right side.

There is no hour meter, just a blank where it would go.

I know you all want pics, but the camera batteries were dead. Bear with me.

Any input you can share is greatly appreciated.

Thanks, John
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Gravely Tractors and '67 Chrysler Newports, What more could a man ask for?

Well, maybe a woman that can fix both and cook.

Speaking of '67 Chrysler Newports:
http://www.cbodydrydock.com/forum_viewtopic.php?8.82569
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Old 10-26-2010, 09:31 PM   post #2 of 12
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Default Re: 16G Service Questions

Engine and tractor both date out as 1987s.
Engine needs an air cooled 30 wt motor oil such as Kawi or Kohler sell. Tranny can be 10W-30, 10W-40, or 30wt.
Just pull the filter for the Hydraulics and replace. Fill the filter and let stand before installing. Make it as full as possible before putting it on. ATF it what it uses. Red as in Dexron, not orange as in Type F.
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Old 10-26-2010, 09:38 PM   post #3 of 12
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Default Re: 16G Service Questions

Quote:
Originally Posted by Fla Don View Post
Engine needs an air cooled 30 wt motor oil such as Kawi or Kohler sell.
Okay, this is interesting - "air cooled" motor oil?
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Old 10-26-2010, 09:57 PM   post #4 of 12
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Default Re: 16G Service Questions

Kohler M18S should be what it has.

I'll second everything Don mentioned, but would check the air gap on your
mower deck pully springs and also check the gap on the forward and reverse clutches as well as lining thicknesses. Pull the lid on the mower gear box and check the grease situation. Replace the gasket if warranted. I seem to always
find these things to be out of whack on a new to me machine for some reason.

I'd go 30wt on the tranny. You can do some basic electrical checks also if you are inclined and make sure your battery is immobilized. Visit the carb. if you find you need to.
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Old 10-27-2010, 07:25 AM   post #5 of 12
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Default Re: 16G Service Questions

Quote:
Originally Posted by NBS View Post
Okay, this is interesting - "air cooled" motor oil?
Not all motor oils work well with engines like on the Gravelys. They tend to run hotter than a liquid cooled so oil breaks down faster. Motorcycle oil is a good example where it even has their own rating systems.
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Old 10-27-2010, 08:27 AM   post #6 of 12
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Default Re: 16G Service Questions

Quote:
Originally Posted by Fla Don View Post
Not all motor oils work well with engines like on the Gravelys. They tend to run hotter than a liquid cooled so oil breaks down faster. Motorcycle oil is a good example where it even has their own rating systems.
Okay, well what about the 2-wheeled engines, like the K301S?

They can take normal oil, right?
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Old 10-27-2010, 10:15 AM   post #7 of 12
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Default Re: 16G Service Questions

Quote:
Originally Posted by Johnny Gravely View Post
Hello all,

It's been a while since I last posted. Spent the summer playing with Newports.(The car, not the cigarette)

I'm servicing a 16g for a friend and have some questions. I've always been a walk behind guy, so the riders are new territory.

Here's what we have:
16G with Kohler Magnum twin, 50" deck and flywheel driven rear triple bagger.

Engine #'s:
Model: blank (there is a Kohler Magnum 16 decal on the air cleaner and engine cover-all Gravely red)
Spec: 24544
Serial: 1713408886

Tractor #'s: (two tags under the hood)
Serial:00596799
Second Tag: 43870

Mower Deck:
Serial: 05156098

This is a near mint, low use machine that my friend bought from the widow of the original owner. He obviously spent more time cleaning/maintaining it than he did using it. When we picked it up last fall, I could tell that she was disappointed that her sons had not kept it as clean as her husband had.

I have downloaded the owner's, service, and parts manuals for it but have yet to read through them all. I like to have real world experience/knowledge as well.

Now for the questions:

1. What vintage is the machine? (I believe it was bought new as a package with the deck and bagger)

2. I'm assuming that engine and trans. oils are two separate things. What should I use for each?

3. Should I change/drain the hydraulic lift fluid and filter? And if so, what is the best way?(I think my friend has used it more this past season than the PO did since new)

4. Besides the basic,(air+fuel filters, plugs, oils, and greasing all fittings) what else should I look for?

The unit starts and runs very well and reliably as it is, no real issues. The hydraulic lift works fine as well.

I have already replaced the deck belt and sharpened what I believe are the original blades.

It has the lever control for fwd/rev, and the foot brake both on the right side.

There is no hour meter, just a blank where it would go.

I know you all want pics, but the camera batteries were dead. Bear with me.

Any input you can share is greatly appreciated.

Thanks, John
I just bought a machine exactly as you have described. My Kohler identification doesn't have a model number also.
All your questions are answered in your service manual.
(1) PO owner stated he bought mine new in 1995.
(2) Engine and trans. have separate fluids. PO used Mobil 1 Synthetic, in the engine, since new. I will continue with this oil but have used Chevron Dello 400 in all my machinery in the past. I would definately try to find out what your friend"s PO used, and stay with it.
(3) and (4) This has been covered.

Now, can I ask you a question---My mower does not have a flywheel screen on the engine. I have tried to locate on, with no success. It appears to me that the screen was mounted on the flywheeh housing with three bolts. Two across bottom and one above the left bottom (at top). All screens I have found are mounted to the flywheel and thus rotate with engine.
How is your screen mounted?
I have owned many lawn tractors and this Gravely appears to be of quality construction.
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Old 10-27-2010, 10:31 AM   post #8 of 12
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Default Re: 16G Service Questions

I also have a 16G. The flywheel screen is plastic and snaps onto the flywheel. I believe what you're missing is the steel wiper, which bolts to the blower housing. It is designed to remove debris from the screen as it rotates.
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Old 10-27-2010, 10:55 AM   post #9 of 12
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Default Re: 16G Service Questions

Quote:
Originally Posted by rscurtis View Post
I also have a 16G. The flywheel screen is plastic and snaps onto the flywheel. I believe what you're missing is the steel wiper, which bolts to the blower housing. It is designed to remove debris from the screen as it rotates.
That makes sense. To my knoledge, the three bagger system was installed when new. I can't understand why anyone would want to run an air cooled engine without the screen! With the bagger system the screen would have to have a center hole for pully shaft to pass through. This pully is mounted to the flywheel with four bolts.
Would there be any way you could give a part number or post a photo of what you have?---THANKS!---
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Old 10-27-2010, 05:30 PM   post #10 of 12
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Default Re: 16G Service Questions

I'll take a picture of my machine tomorrow, unless of course, someone else beats me to it.
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Old 10-28-2010, 11:05 AM   post #11 of 12
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Default Re: 16G Service Questions

Here are the pictures I promised. The second photo in the third slot from the top shows how the screen is secured to the flywheel.
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Old 10-28-2010, 06:41 PM   post #12 of 12
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Default Re: 16G Service Questions

THANKS rscurtis---these photos help. Now I know what I need
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