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post #16 of 33 Old 05-13-2019, 01:11 PM
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Re: Kawasaki FD620D Plastic Cam Gear

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Originally Posted by zebra5 View Post
could a small bore camera be inserted through the oil drain to "look" at the cam gear?
+1
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post #17 of 33 Old 05-13-2019, 02:00 PM Thread Starter
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Re: Kawasaki FD620D Plastic Cam Gear

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Originally Posted by Zebra5 View Post
Could a small bore camera be inserted through the oil drain to "look" at the cam gear?
I only wished I had that kind of high-tech equipment!

In the past:
Craftsman, MTD, Snapper, 1961 Ford 801 Powermaster, 1992 LB 4.5HP 580546, 2003 LB 10552 6.5HP Duraforce, IH Cub Cadet 105, 2001 Cub Cadet 2146 14HP Linamar 38" deck, love of my life (Sold 10 Dec 2011), 2007 Cub Cadet 2550 22HP Kohler Vtwin 50"deck (Sold 22 Aug 2018)
In use:
1994 JD LX178 sweet little mower, only 15HP, twin cyl, 38" deck, liquid cooled!
1998 JD 445 22HP Shaft driven wheels, shaft driven 60" deck, diff-lock, hydraulic lift, power steering, fuel & temp gauges, fuel injected, and liquid cooled! This machine has it all!
2005 Nortrak NT 254 25HP Diesel 5' FEL, here's a case of cost-cutting, I only need a tractor 3 or 4 times a year

Going to try to stay Liquid Cooled the rest of my life! Hey, it gets HOT here!
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post #18 of 33 Old 05-13-2019, 03:36 PM
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Re: Kawasaki FD620D Plastic Cam Gear

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Originally Posted by mowergene View Post
I only wished I had that kind of high-tech equipment!
I have no experience with this product or brand, but for $20 you can get an inspection camera that connects to a smartphone or laptop. I'm sure it's very low quality but I would expect it to get the job done.

https://www.amazon.com/DEPSTECH-Semi...%2C178&sr=8-10
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post #19 of 33 Old 05-13-2019, 04:22 PM Thread Starter
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Re: Kawasaki FD620D Plastic Cam Gear

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Originally Posted by denverguy View Post
I have no experience with this product or brand, but for $20 you can get an inspection camera that connects to a smartphone or laptop. I'm sure it's very low quality but I would expect it to get the job done.

https://www.amazon.com/DEPSTECH-Semi...%2C178&sr=8-10
No laptop and no smartphone. I'm from the flipphone era.

In the past:
Craftsman, MTD, Snapper, 1961 Ford 801 Powermaster, 1992 LB 4.5HP 580546, 2003 LB 10552 6.5HP Duraforce, IH Cub Cadet 105, 2001 Cub Cadet 2146 14HP Linamar 38" deck, love of my life (Sold 10 Dec 2011), 2007 Cub Cadet 2550 22HP Kohler Vtwin 50"deck (Sold 22 Aug 2018)
In use:
1994 JD LX178 sweet little mower, only 15HP, twin cyl, 38" deck, liquid cooled!
1998 JD 445 22HP Shaft driven wheels, shaft driven 60" deck, diff-lock, hydraulic lift, power steering, fuel & temp gauges, fuel injected, and liquid cooled! This machine has it all!
2005 Nortrak NT 254 25HP Diesel 5' FEL, here's a case of cost-cutting, I only need a tractor 3 or 4 times a year

Going to try to stay Liquid Cooled the rest of my life! Hey, it gets HOT here!
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post #20 of 33 Old 05-13-2019, 04:28 PM
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Re: Kawasaki FD620D Plastic Cam Gear

The combination of already having 1,500 hours on the machine and the date on the airbox would make me feel pretty comfortable it has the steel gear. John Deere had obviously identified the plastic cam gears as an issue prior to Feb. 1998 so can't imagine they would intentionally install an engine built like that in June or later of '98. I would be surprised if they had 4-6 months worth of engines sitting around in a warehouse, and even if they did it is pretty common for manufacturers to go through any old inventory and update the part before installing it in the machine.
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post #21 of 33 Old 05-13-2019, 08:28 PM Thread Starter
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Re: Kawasaki FD620D Plastic Cam Gear

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Originally Posted by 6.2Blazer View Post
The combination of already having 1,500 hours on the machine and the date on the airbox would make me feel pretty comfortable it has the steel gear. John Deere had obviously identified the plastic cam gears as an issue prior to Feb. 1998 so can't imagine they would intentionally install an engine built like that in June or later of '98. I would be surprised if they had 4-6 months worth of engines sitting around in a warehouse, and even if they did it is pretty common for manufacturers to go through any old inventory and update the part before installing it in the machine.
That's the kind of thinkin' I'm holding on to. It certainly is a smooth runner!

In the past:
Craftsman, MTD, Snapper, 1961 Ford 801 Powermaster, 1992 LB 4.5HP 580546, 2003 LB 10552 6.5HP Duraforce, IH Cub Cadet 105, 2001 Cub Cadet 2146 14HP Linamar 38" deck, love of my life (Sold 10 Dec 2011), 2007 Cub Cadet 2550 22HP Kohler Vtwin 50"deck (Sold 22 Aug 2018)
In use:
1994 JD LX178 sweet little mower, only 15HP, twin cyl, 38" deck, liquid cooled!
1998 JD 445 22HP Shaft driven wheels, shaft driven 60" deck, diff-lock, hydraulic lift, power steering, fuel & temp gauges, fuel injected, and liquid cooled! This machine has it all!
2005 Nortrak NT 254 25HP Diesel 5' FEL, here's a case of cost-cutting, I only need a tractor 3 or 4 times a year

Going to try to stay Liquid Cooled the rest of my life! Hey, it gets HOT here!
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post #22 of 33 Old 05-16-2019, 07:34 AM
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Re: Kawasaki FD620D Plastic Cam Gear

My 1994 had about 1100 hours on it and I caved to worry about cam gear and had it replaced with steel. The old one looked like the day it was made so I probably didn't need to worry at all. As I understand it no damage will happen to engine if it does fail. Its just a matter of convenience when to do it. You would hate to be down in the middle of either mowing or snow removal season.
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post #23 of 33 Old 05-16-2019, 11:17 AM Thread Starter
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Re: Kawasaki FD620D Plastic Cam Gear

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Originally Posted by GPopper View Post
The old one looked like the day it was made so I probably didn't need to worry at all.
Simply looking at plastic gives you no idea of how Brittle it is. I, personally, think all plastic parts should be banned from the inside of an engine which exposes it to extreme heating and cooling.

In the past:
Craftsman, MTD, Snapper, 1961 Ford 801 Powermaster, 1992 LB 4.5HP 580546, 2003 LB 10552 6.5HP Duraforce, IH Cub Cadet 105, 2001 Cub Cadet 2146 14HP Linamar 38" deck, love of my life (Sold 10 Dec 2011), 2007 Cub Cadet 2550 22HP Kohler Vtwin 50"deck (Sold 22 Aug 2018)
In use:
1994 JD LX178 sweet little mower, only 15HP, twin cyl, 38" deck, liquid cooled!
1998 JD 445 22HP Shaft driven wheels, shaft driven 60" deck, diff-lock, hydraulic lift, power steering, fuel & temp gauges, fuel injected, and liquid cooled! This machine has it all!
2005 Nortrak NT 254 25HP Diesel 5' FEL, here's a case of cost-cutting, I only need a tractor 3 or 4 times a year

Going to try to stay Liquid Cooled the rest of my life! Hey, it gets HOT here!
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post #24 of 33 Old 05-16-2019, 11:52 AM
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Re: Kawasaki FD620D Plastic Cam Gear

I too thought that no damage would occur but there is a video on Youtube that shows one with all of the push rods bent after the cam gear failed.
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post #25 of 33 Old 05-16-2019, 03:30 PM
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Re: Kawasaki FD620D Plastic Cam Gear

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Originally Posted by inspectorudy View Post
I too thought that no damage would occur but there is a video on Youtube that shows one with all of the push rods bent after the cam gear failed.
According to what I am finding, it isn't supposed to be an interference engine..... so, cam gear failure should NOT lead to catastrophic damage...... But, as a LOT of folks have noted, both here, and elsewhere... You KNOW it's a problem, it is not an "if", it's a "when". Fix it when it is convenient for YOU. Otherwise, it will pick the worst possible moment to fail. (like when you are trying to blow out your driveway during the 30" snowfall..... Then you get to work on it out in the cold too. )
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post #26 of 33 Old 05-16-2019, 03:40 PM
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Re: Kawasaki FD620D Plastic Cam Gear

Here is the video and the four pushrods that are bent from the cam failure.

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post #27 of 33 Old 05-16-2019, 04:00 PM
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Re: Kawasaki FD620D Plastic Cam Gear

Interesting video.... I note that all four pushrods appear to be bent? Yet there is zero evidence on the piston tops, that they smacked anything at all.....

I don't think that the cam gear failure can account for all four pushrods being bent.... that would require the cam gear to have failed when all four valves were off the seat. I am unsure if that is ever the actual case though.....
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post #28 of 33 Old 05-16-2019, 04:02 PM
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Re: Kawasaki FD620D Plastic Cam Gear

Like the old song, "Nothing like your lying eyes."
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post #29 of 33 Old 05-16-2019, 04:06 PM
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Re: Kawasaki FD620D Plastic Cam Gear

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Like the old song, "Nothing like your lying eyes."
Huh? Are you seeing something I am not?
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post #30 of 33 Old 05-16-2019, 04:08 PM
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Re: Kawasaki FD620D Plastic Cam Gear

It's possible the cam could fail by several teeth breaking or wearing so that it could skip several teeth, then momentum would keep everything spinning so all the valves get hit by the pistons...
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