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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2001 Posts: 95 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 95 | My C-60 with a SM420 transmission has a PTO to run the dump bed. The PTO is an A series (replaced by 100 series) Chelsea made by Dana (Spicer)
Does anyone know where I can find a parts book and or rebuild kit for a 1960’s Chelsea PTO made by Dana? I have searched to no avail. | | | | | Joined: Mar 2004 Posts: 6,225 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,225 | There's not much to rebuild... The seals will have a number stamped on it. Roller/ball bearings will have numbers on them...if they are bushings and they are worn you can have new ones made at a machine shop You can make a gasket the same thickness as the original one (gasket acts as a shim to put the gear in a good mating location with the drive gear). If the shaft is worn, take it to a machine shop and have a new one made. If the gear is worn, buy another used PTO unit with a better gear. Just make sure the replacement PTO came off of a SM-420 as the driven gears are custom to the make/model of the trans they are bolted to. Mike B  | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Useful document, shows the adapter gear for my Spicer 5553a trans., will not hold still enough to print though.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Nov 2011 Posts: 1,611 'Bolter | | 'Bolter Joined: Nov 2011 Posts: 1,611 | Thanks for sharing the document. If your old PTO proves to be unrebuildable, I have a nearly new Chelsea that was on a SM420 that I would let go. | | |
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