Cummins M35A2 starter question

[290smallcam]

Putting together a list of notes for all the things I'll need to do a 12 valve swap. I've been watching tactical repair on youtube to get as much as I can, but still have a few questions. So I'll need a 24 volt 28MT 10 tooth bendix gear starter. I've found them but with different pinion sizes?????? So I'm lost. Each one has a stock replacement number that it'll replace in it's spot. Does anyone have a reference number or know the part number for the one that is correct and fit?......

 

[290smallcam]

Also, I know ..... Pilot bearing, the 14 inch 173 teeth flywheel requires a 306 pilot bearing. Do I need one? Or is M35 same size. Transmissions and drive lines are not my strong field so I need input from you that know.

 

[cbrTodd]

What are the part numbers for your flywheel, ring gear if it is not original to the flywheel, and flywheel housing?

G has the right information on the pilot bushing. I was going off memory and mixed up the ID with the OD. You will still need something to adapt to the 306 bearing that has an ID of 1.179 inches.

 

[gringeltaube]

The Spicer 3053a uses an input shaft that goes into a pilot bushing with a 0.75 inch OD and a 0.5 inch ID.

Let me correct that... The pilot diameter of the input shaft is 0.7465-0.7475 inches, for a new part. And it takes a pilot bearing sleeve (NSN
3120-00-057-4506, part# 10935441) with a 0.7520 - 0.7530 inches ID; 1.0030 - 1.0040 inches OD and a length of 1.1800 - 1.2000 inches.

 

[cbrTodd]

Let me correct that... The pilot diameter of the input shaft is 0.7465-0.7475 inches, for a new part. And it takes a pilot bearing sleeve (NSN
3120-00-057-4506, part# 10935441) with a 0.7520 - 0.7530 inches ID; 1.0030 - 1.0040 inches OD and a length of 1.1800 - 1.2000 inches.

Sorry for my mistake, edited my post to refer to yours. That's what I get for attempting to help without being in the shop.

He will still need an adapter, and depending on his choice of flywheel and flywheel housing, potentially for a depth change and not just diameter. I am gathering parts for a similar swap and will have to cross this bridge myself at some point.

 

[gringeltaube]

He will still need an adapter, and depending on his choice of flywheel and flywheel housing, potentially for a depth change and not just diameter. I am gathering parts for a similar swap and will have to cross this bridge myself at some point.

Below are some dimensions from when I went through all this...

 

[290smallcam]

Flywheel housing #3931716 or 3908574....... Flywheel 17"@14" clutch #SKU 29-0733921263..... As for the clutch spicer style 107621-1 @ 14"...... I would really like to get a FSO-6460A instead of the spicer but can't find each part number. Just people saying to find a FL70 and buy it!

 

[cbrTodd]

Unfortunately the part number you gave me for the flywheel is for the flywheel itself without the ring gear, and there are at least 2 different ring gears that work with it. Some are 8/10 pitch, some are 10/12 pitch. So without knowing more information, I can't be sure which pitch of starter pinion that you will need. If you could get the part number off the ring gear itself, I could look that up.

You definitely have a SAE #2 housing which uses a "SAE #1 3 bolt 90 degree" style of starter. But as you said there are a couple starter pinions and a couple potential solenoid orientations that could go with it. If you wanted to PM me your engine serial number, I can see if I can find out what it would have had originally. But if this flywheel didn't come on the engine you are using, it won't be any help.

For what it's worth, I couldn't find one of the overdrive FSO units for sale at a reasonable price either. Lots of direct drive though. I would be willing to relocate the transfer case back to make the OD version fit, if I could just find one...

 

[290smallcam]

Yea they cost$ I posted a thread about using the 5 speed from the M 813 truck behind the 12 valve but no bites

 

[290smallcam]

I don't have a M35. I have a 5 ton. I really want one so I've been doing research on cummins swap. Trying to figure out how hard it will be. I want to make sure I can get and locate everything so I don't waste money when the time comes. Most importantly is will people help along with info and part numbers if I run into a wall or any problems. I try to do all the research my self but I get lost and agravated and kinda lose hope and say screw it stick with the 5 ton