Re: H Cam Gear

Posted by Bob M on December 13, 2000 at 08:39:31 from (192.232.119.194):

In Reply to: H Cam Gear posted by Jim on December 13, 2000 at 04:06:38:

Jim - I recently replaced a busted cam gear on a Super M. Here's how I did it:

1 - Purchased a replacement gear (I got a new one from Carter & Grunenwald). Once I had the new gear in hand....

2 - Jacked up the tractor and supported it from the clutch housing, leaving front wheels a couple inches off the floor. Drained the cooling system and removed the radiator hoses.

3 - Unbolted the upper bolster from the frame rails, then loosened the motor mount bolts thru the frame rails. Disconnected the steering shaft at the U-joint. Removed the entire front bolster, wheels and radiator as an assembly (you'll need an engine hoist or a front loader for this step - the bolster assembly is VERY HEAVY!)

4 - Removed the crank pulley nut (needs a 1-1/2" socket for the Super M - your H is probably a size or two smaller). Once the nut was removed the crank pulley slid easily off the shaft - no puller required.

5 - Removed about 15 or so cap screws holding the timing gear cover on. Not all the cap screws come in from the front - there's one or two that come in from behind the governor, a couple come in from the distributor side, and two that come up from the bottom thru the oil pan flange. Also keep track of where each screw comes from - there's 3 different lengths of screws used. Carefully remove the gear cover. Beware - it's cast iron and heavier than it looks!

6 - Turned the crank until all of the timing marks (1 on the crank gear, 2 on the cam gear, and 1 on the distributor drive gear) are in register.

7 - Removed the keeper, then the cam gear nut (1-1/4"(?) nut). Note - the nut is LEFT handed on the Super M; believe however it's right handed on the older tractors. If the shaft turns when you try to loosen the nut, jam a shop rag into one of the timing gear meshes to prevent it from turning.

8 - Finally pull the old gear off the camshaft. Be careful to not lose the Woodruff key from cam gear - it's an odd size and not readily available except from the dealer or a boneyard.

Reassembly is essentially the reverse of the above. I did not bother with a new gasket for the gear cover - simply scraped old gasket from the mating surfaces then coated them with a light bead of Permatex red silicone gasket maker just before assembly.

Also... You're gonna need a couple of big sockets to get the crank and timing gear nuts off and back on. If you don't have a 3/4" drive socket set, suggest borrowing one for a few days.

Link below has several photos of various steps of the replacement process.

Hope this helps and good luck!! Bob M

• photos - cam gear replacement

Follow Ups:

• Re: Re: H Cam Gear Jim 10:45:32 12/13/00 (0)
• Re: Re: H Cam Gear Red Dave 09:25:17 12/13/00 (2)
  • Re: Re: Re: H Cam Gear Bob M 10:02:46 12/13/00 (1)
    • Re: Re: Re: Re: H Cam Gear Bob R 12:58:51 12/13/00 (0)

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