Need Advice on Left Brake Roll Pin for D17 IV

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   So the left brake started not returning back to its stop.  Studying it, the spring on the left is intact and seems to be returning the actuating lever and rod back to its rest position.  There appears to be slop in the pedal to the shaft.  The Agco parts book shows a roll pin or something similar securing the left brake pedal to the shaft.  It looks like I need to replace the roll pin in the left brake pedal to the cross shaft.  

Can I just drive out the old, bent pin and replace it with new, or should I plan to pull both pedals off and kind of rework everything?  Is there room for the old pin to be driven out leaving everything intact, which would sure make things simple.  Also, is there an "upgrade" in that I should replace the pin with a hardened bolt, assuming I have enough clearance?

Thanks in advance for anyone who has done this before. 

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Oldwrench Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 12 Jan 2020 Location: Northeast Points: 151	Post Options Post Reply Quote Oldwrench Report Post Thanks(0) Quote Reply Topic: Need Advice on Left Brake Roll Pin for D17 IV Posted: 24 Apr 2022 at 4:57pm
	So the left brake started not returning back to its stop. Studying it, the spring on the left is intact and seems to be returning the actuating lever and rod back to its rest position. There appears to be slop in the pedal to the shaft. The Agco parts book shows a roll pin or something similar securing the left brake pedal to the shaft. It looks like I need to replace the roll pin in the left brake pedal to the cross shaft. Can I just drive out the old, bent pin and replace it with new, or should I plan to pull both pedals off and kind of rework everything? Is there room for the old pin to be driven out leaving everything intact, which would sure make things simple. Also, is there an "upgrade" in that I should replace the pin with a hardened bolt, assuming I have enough clearance? Thanks in advance for anyone who has done this before.

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Gatz in NE Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Sep 2009 Location: Lincoln, NE Points: 1053	Post Options Post Reply Quote Gatz in NE Report Post Thanks(0) Quote Reply Posted: 24 Apr 2022 at 5:24pm
	You're on the right track. Before driving the old pin out, make sure the mating holes in the brake pedal and the shaft are still aligned as the pin may have been crushed. LH brake pedal back; LH brake shaft retracted by spring. Should be room to drive it up. I'm not sure what size the 70915599 roll pin is (might be 5/16 ") but should be easily obtained locally. If not, check with AGCO dealer.

DSeries4 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Ontario, Canada Points: 7505	Post Options Post Reply Quote DSeries4 Report Post Thanks(0) Quote Reply Posted: 24 Apr 2022 at 7:38pm
	Before anything, I would apply some penetrating oil to the shaft to make sure it is not rust and crud preventing things from moving properly. I have had good luck with that before.
	'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080

Oldwrench Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 12 Jan 2020 Location: Northeast Points: 151	Post Options Post Reply Quote Oldwrench Report Post Thanks(0) Quote Reply Posted: 25 Apr 2022 at 12:33pm
	Thanks to both of you for the help. I'll find the right sized drift and see what happens. A roll pin doesn't seem like the strongest type of pin for this situation, but it did hold up for 50+ years so maybe that's good enough.

Gatz in NE Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Sep 2009 Location: Lincoln, NE Points: 1053	Post Options Post Reply Quote Gatz in NE Report Post Thanks(0) Quote Reply Posted: 25 Apr 2022 at 4:41pm
	Agree with lubing up the shaft/bracket to make sure it isn't bound up. I had something similar happen to a JD lawn tractor a couple years ago. Took some time to find where the problem was. The picture shows a "standard" roll pin. There's also "Coiled Spring Pins" if the hole has out-of-roundness or the standard pin is too loose. http://www.mcmaster.com/pins/pin-type~spring/heavy-duty-coiled-spring-pins/ If those won't work because the hole is wore out, you could go with a 8mm (nominal Ø.315) roll pin which would definitely fill the gap, but it may require drilling it out first.