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D814a steering issues

D814a steering issues

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Gator
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Hello everyone. Im excited to have finally signed up to acmoc! I have owned a 1956 d814a for near 9 years and have repaired or replaced most parts on this old girl over that time. Originally bought her to do some clearing up here in Canada where I call home. The old girl was beat up bad and I had blinders on when I bought her. There was something about that old dozer I just couldn’t pass up though. Something about running an a old dove twice my age. Always loved older women! lol. I have replaced the pup with a direct electric start, installed new precombistion chambers and glow plugs. Did an engine swap. Rebuilt final drives. Swapped out track frames and complete undercarriage with a 13a big pusher. Also installed a pair of 8d batteries to power the new starter and installed a proheat coolant heater for those extra chilly days. I also replaced hydraulic hoses and fittings and pump! Etc, etc. That being said on most days I take her out for a spin I generally end up pulling a few wrenches afterwards. As of late I was doing some tree cutting on the farm and noticed that the right side steering clutch seems to be slipping under heavy load. I removed back covers and found that the yoke was as far towards the outside of the dozer as could be. I have about 6 inches of free play in the levers which I’m assuming is way to much. It was always hard steering that direction and am totally guessing here, but figure running the machine with lots of free play has caused the clutches to slip when trying to turn. Always had to stand on that brake to help her get around. Even with the brake adjusted. Still learning with this old girl. Never thought or checked this until today. I’m guessing that my clutches are near plumb wore out.

Now the question that I have is if I adjust the yoke to give myself less free play will that stop the slipping or should I just pull it all apart and replace? I have a repair manual but Not a maintenance or operating manual. There it is ladies and gentlemen. Any responses, comments, suggestions to my ongoing endeavour would be greatly appreciated.
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Sun, Mar 11, 2018 1:22 AM
gemdozer
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Yes you have to adjusted the yoke nut until 4 3/8 inchs clearance is obtained between the control lever and the top metal plate on front of the seat and the brake pedal depressed approximately 5 1/2 inchs
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Sun, Mar 11, 2018 1:58 AM
Old Magnet
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Reply to gemdozer:
Yes you have to adjusted the yoke nut until 4 3/8 inchs clearance is obtained between the control lever and the top metal plate on front of the seat and the brake pedal depressed approximately 5 1/2 inchs
Here is the steering clutch and brake adjustment procedures.
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Sun, Mar 11, 2018 2:17 AM
Gator
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Reply to gemdozer:
Yes you have to adjusted the yoke nut until 4 3/8 inchs clearance is obtained between the control lever and the top metal plate on front of the seat and the brake pedal depressed approximately 5 1/2 inchs
Hello. Thanks for the speedy response! So with levers in the relaxed position I should have 4-3/8 or with levers pulled to omit the free play? I should say this is a dry deck. Don’t know if that changes anything.
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Sun, Mar 11, 2018 2:20 AM
Gator
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Hello. Thanks for the speedy response! So with levers in the relaxed position I should have 4-3/8 or with levers pulled to omit the free play? I should say this is a dry deck. Don’t know if that changes anything.
Thanks a million guys. Going to go and adjust this unit right now and hope i don’t have to pull clutches. I will let you know how it goes.
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Sun, Mar 11, 2018 2:23 AM
Andrew
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Reply to Gator:
Thanks a million guys. Going to go and adjust this unit right now and hope i don’t have to pull clutches. I will let you know how it goes.
Does the 13A have the serated tooth adjustment at the bottom of the steering clutch yoke as seen in the 2U and earlier series?? If so this could be your problem.
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Sun, Mar 11, 2018 4:26 AM
Gator
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Reply to Andrew:
Does the 13A have the serated tooth adjustment at the bottom of the steering clutch yoke as seen in the 2U and earlier series?? If so this could be your problem.
I have a 13a that I robbed the undercarriage and track frames off of and Didn’t look to close as to how the clutches are adjusted. Although I see that there are inspection covers on the back of the dozer instead of on the top of the back deck like the 14a. Mine unit is a 14A3373. I think that’s just a few numbers off from being a wet deck.

I went out and had to remove the ccu off the tractor in order to get enough room to work on in those little holes. Found that the yokes were adjusted as far as the adjustment rods would take them and then some! Looks like I will be replacing steering clutches.
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Sun, Mar 11, 2018 7:15 AM
Gator
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I have a 13a that I robbed the undercarriage and track frames off of and Didn’t look to close as to how the clutches are adjusted. Although I see that there are inspection covers on the back of the dozer instead of on the top of the back deck like the 14a. Mine unit is a 14A3373. I think that’s just a few numbers off from being a wet deck.

I went out and had to remove the ccu off the tractor in order to get enough room to work on in those little holes. Found that the yokes were adjusted as far as the adjustment rods would take them and then some! Looks like I will be replacing steering clutches.
I attached some photos of the end of the yokes and the adjustment rods. What is your guys take on them?
Attachment
Attachment
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Sun, Mar 11, 2018 8:02 AM
Old Magnet
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Reply to Gator:
I have a 13a that I robbed the undercarriage and track frames off of and Didn’t look to close as to how the clutches are adjusted. Although I see that there are inspection covers on the back of the dozer instead of on the top of the back deck like the 14a. Mine unit is a 14A3373. I think that’s just a few numbers off from being a wet deck.

I went out and had to remove the ccu off the tractor in order to get enough room to work on in those little holes. Found that the yokes were adjusted as far as the adjustment rods would take them and then some! Looks like I will be replacing steering clutches.
Went to wet deck at s/n 14A3861
Try www.steeringclutch.com for parts.
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Sun, Mar 11, 2018 8:02 AM
Gator
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Reply to Old Magnet:
Went to wet deck at s/n 14A3861
Try www.steeringclutch.com for parts.
Thanks old magnet. Have a complete parts dozer here with a stuck engine and stuck pup engine. The clutches still look like they have plenty of adjustment on the rods left. Going to pull them and see what they have left. Hoping for the best. I will post some pics of the changeout. Going to start tomorrow.
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Sun, Mar 11, 2018 8:42 AM
Paso Bob
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Thanks old magnet. Have a complete parts dozer here with a stuck engine and stuck pup engine. The clutches still look like they have plenty of adjustment on the rods left. Going to pull them and see what they have left. Hoping for the best. I will post some pics of the changeout. Going to start tomorrow.
It really isn't a hard job pulling the steering clutches, just time consuming. Unbolt the brake bands and the pivot blocks and lift them out. Pull all of cap screws out through the pipe plug through the track frame from the brake drum, and the cap screws off of the steering clutch, take a heavy crow bar and break the brake drum loose and slide it towards the center of the tractor. the clutches will lift right out. Do make sure you check all of the threads on the brake drum before re-installing them. I made the mistake of not doing that and found two stripped, so back out one drum came and had them helicoiled. I found that moving the tractor back and forth to get to each cap screw was a pain in the ass... If it has been a while since the brake bands have been out, the retainer that keeps the adjustment bolt from turning under operation can be rusty and break off as it is riveted on. I ground the heads down on grade 8 bolts and counter sunk the lining and bolted new retainers on. Good luck.
D-4 7U-43159 with 4S dozer and Cat 40 scraper, D-7 3T-1179 with Cat 7S hydraulic dozer, D-7 17A 13,944, D-8 14A-1160 with Cat 8S cable dozer, Cat 12-99E-4433 Grader. All runners and users.
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Sun, Mar 11, 2018 12:19 PM
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