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Fourced 
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Joined: 11 May 2013
Location: West Michigan
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 Topic: D15 rear lift issues
Posted: 11 May 2013 at 5:52pm |
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I recently bought a D15 that needs some TLC, one issue it has is the rear lift only works when it wants to.
One day it works the next it refuses to work at all. I have checked the fluid and it seems to have water in it, I assume that is part of the problem.
When I drain the fluid I want to check the pump and valve to see if all is well.
Is the hydraulics the front reservoir or the rear? They both seem to have water in the oil.
I am guessing the pump is above the plate bolted on the bottom of the tractor just in front of where the shifter is, making the front reservoir the hydraulics.
Any help, pictures or links to manuals would be great. THANKS!
Ben
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DiyDave
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Joined: 11 Sep 2009
Location: Gambrills, MD
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Posted: 11 May 2013 at 6:23pm |
Hyd fluid dipstick is in front of gas tank, right side (not the carb side). Drain is under the hydraulic pump, left side, under the pto lever. Use any universal hytran fluid.
Differing series of this tractor, have different internal sealing. Early series (round muffler, no thumb guard on the hi-lo lever) have 2 dipsticks, for the hyd fluid, the one mentioned above, and one to the left and under the dash area, (top of transmission)and these 2 compartments are individually sealed. Later model series 2, the compartments are united (no seals between them), have both dipsticks, but you can read either.
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Fourced
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Posted: 11 May 2013 at 7:00pm |
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Mine is a series 2, and has a button on the hi/lo lever.
I saw the spot on the right side that looked like it might be a fill, but mine has what looks like a vent there.
It has a vented dipstick and one that looks like a big bolt(with a dipstick) down by the shifter.
those both show full, but the hyd is sluggish. I will go further inspect the third spot you mentioned.
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Dean (West MI)
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Location: West Michigan
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Posted: 11 May 2013 at 7:51pm |
Hesperia?
After you register, you can download the I&T manuals at the following link. I would search ebay and find an original Allis Chalmers service manual also, sometimes one has better pictures and details over the other and every once in a while, the I&T manual has incorrect information. http://www.classicmachinery.net/forum/downloads.php?cat=8
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MACK
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Posted: 11 May 2013 at 10:27pm |
ALL D15 have the dip stick and fill for hydraulic pump under fuel tank. The two below the dash near the gearshift are trans. and PD. The front dipstick is PD. The rear most dipstick is trans.
The drain plug for the hydraulics is on the pan that covers the pump, where the TB linkage hooks. MACK
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DiyDave
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Posted: 12 May 2013 at 5:29am |
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Power director compartment and front hyd compartment are united, on a series 2 tractor. I did not say that series 2 tractors have a button at the top of the hi-lo lever. Both series have the button, I said series 2 tractors have a thumb guard, that surrounds front and side of the button.
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DrAllis
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Posted: 12 May 2013 at 7:52am |
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Power Director oil is to the left of the dashboard when sitting in the seat. The hydraulic oilis under the right side of the fuel tank. D-15's NEVER ever had those two compartments joined as one.
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Fourced
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Posted: 12 May 2013 at 8:31am |
When I walked out to the tractor I saw what you mean. I have the thumb guard. My VIN is 17385
 DiyDave wrote:
Power director compartment and front hyd compartment are united, on a series 2 tractor. I did not say that series 2 tractors have a button at the top of the hi-lo lever. Both series have the button, I said series 2 tractors have a thumb guard, that surrounds front and side of the button. |
Edited by Fourced - 12 May 2013 at 8:37am
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Fourced
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Posted: 12 May 2013 at 5:18pm |
Thank you DR Allis, You are correct, I filled the hyd reservoir and they work great!
DrAllis wrote:
Power Director oil is to the left of the dashboard when sitting in the seat. The hydraulic oilis under the right side of the fuel tank. D-15's NEVER ever had those two compartments joined as one. |
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DiyDave
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Posted: 12 May 2013 at 6:18pm |
DrAllis wrote:
Power Director oil is to the left of the dashboard when sitting in the seat. The hydraulic oilis under the right side of the fuel tank. D-15's NEVER ever had those two compartments joined as one. |
Dr Allis, you are right, I was thinking of the late D-17's.
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MACK
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Posted: 12 May 2013 at 9:40pm |
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Thanks Dr.Allis they didn't lisen to me when I told them. MACK
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Fourced
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Posted: 13 May 2013 at 7:11pm |
You did indeed give the correct answer MACK, the post below yours said they were connected and DR A added the they were never connected. I have working hydraulics thanks to all the people who posted. THANK YOU!
MACK wrote:
Thanks Dr.Allis they didn't lisen to me when I told them. MACK |
Edited by Fourced - 14 May 2013 at 2:34am
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MACK
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Posted: 13 May 2013 at 9:41pm |
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Fourced, You should go back and reread my post. No where did I say the PD and hydraulics were connected. MACK
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rooster68
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Posted: 22 May 2017 at 2:48pm |
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Hi fellas, I seem to have this same problem and after reading all your posts and checking everything mentioned I still have the slow lift issue. Is there an internal filter or screen or something else that would cause this. I will mention that it worked fine when I parked it for the winter and it has done this in the past and started working again until now. Any help would be great!
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MACK
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Posted: 22 May 2017 at 9:29pm |
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Will it lift faster if you move the lever further up? MACK
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rooster68
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Posted: 22 May 2017 at 10:12pm |
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No Mack it doesn't. When I increase the RPM it does go a little faster.
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rooster68
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Posted: 23 May 2017 at 5:12am |
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Mack, would there be a screen on the intake of the pump that could be blinded?
Ron
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MACK
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Posted: 23 May 2017 at 8:34am |
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No, I don't think a 15 ever had a screen. I would guess it might have a plunger stuck or check valve springs broken. Best to pull it out and check it over. MACK
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DrAllis
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Posted: 23 May 2017 at 9:03am |
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I had Dad's old series 2 D-15 apart this Winter and there were two screens. One between the sump and the bottom of the torque housing and one at the pumps inlet. Might be a s/n related change, but we had screens in ours.
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rooster68
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Posted: 23 May 2017 at 12:21pm |
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Thanks fellas, this is where I'll start and I will let you know what I find.
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