Wombat wrote:

It looks like a D7E block with D7 17AD manifolds, turbo etc as that is a different configuration to a D7E.

Wombat

Thanks for the info! 

Bulletpruf,
You asked if the main clutch could be stuck, that's very unlikely, this model of D7 has an oil immersed clutch, it's highly likely to be dragging somewhat with the cold oil in it. I think it's at about 12:49 minute mark in your YouTube video, there's a dipstick in front of your left foot, if my eyes are not mistaken, that's the dipstick for checking the oil level in the main clutch.

seiscat wrote:

Wait!!! The D7D Used the same basic engine as the D7E. The fuel rack doesn't move despite movement of the throttle control lever until oil pressure is high enough to allow it to move!!
Be Careful,
Craig
 

If the interlock is the same in principal as the D330 then the rack should still be able to be moved. The interlock only locks the internal mechanical throttle linkage. The governor and the rack are not affected. Even then the throttle can be moved from idle to the shutdown position. Putting an interlock on the actual rack I think could be dangerous.
As he has been able to move the throttle lever then I assume the interlock had been removed or was never there.

D8Dude is correct, all D7 17As had an oil clutch so a stuck clutch is not the issue. The D339 engine was used in the D7 starting in 1955 with the D7C(17A non-turbo). The D339 was used in the D7D and then throughout the D7E series so the casting numbers on the blocks would all be the same. I doubt the engine in this D7D has been changed to a D339 engine from a D7E but that is remotely possible.
Again, the D339 will not allow the fuel rack to move until sufficient oil pressure is achieved! The operator's throttle lever can be moved to any position with no effect on the fuel rack until there is oil pressure.
Craig

D8Dude wrote:

Bulletpruf,
You asked if the main clutch could be stuck, that's very unlikely, this model of D7 has an oil immersed clutch, it's highly likely to be dragging somewhat with the cold oil in it. I think it's at about 12:49 minute mark in your YouTube video, there's a dipstick in front of your left foot, if my eyes are not mistaken, that's the dipstick for checking the oil level in the main clutch.

Thanks, I'll check that the next time I'm out there. 

seiscat wrote:

D8Dude is correct, all D7 17As had an oil clutch so a stuck clutch is not the issue. The D339 engine was used in the D7 starting in 1955 with the D7C(17A non-turbo). The D339 was used in the D7D and then throughout the D7E series so the casting numbers on the blocks would all be the same. I doubt the engine in this D7D has been changed to a D339 engine from a D7E but that is remotely possible.
Again, the D339 will not allow the fuel rack to move until sufficient oil pressure is achieved! The operator's throttle lever can be moved to any position with no effect on the fuel rack until there is oil pressure.
Craig

Gotcha.  Next time we're out there, I'll work on building up oil pressure to see what happens.

Thanks

Scott

With some assistance from a very helpful member here (thanks Craig!) I was able to source all the manuals for the tractor from eBay. I also have one coming for the winch.

Scott

Hi Scott, The older Caterpillars had separate manuals for the basic bare tractor and then for every option added i.e. blade, hydraulic system or cable control etc.
These books are in the ACMOC library but the library is sometimes difficult to navigate. To find them enter the document type. DO NOT enter the equipment type nor the equipment model just select and enter the accessory needed in the accessories column. Then scroll down until you find the one you need.
If you want to purchase them:
Blade parts book & OMI 
www.ebay.com/itm/375041500436
www.ebay.com/itm/114918359222
Hydraulic system parts book & OMI
www.ebay.com/itm/285580550854
www.ebay.com/itm/126217369080

 

seiscat wrote:

Hi Scott, The older Caterpillars had separate manuals for the basic bare tractor and then for every option added i.e. blade, hydraulic system or cable control etc.
These books are in the ACMOC library but the library is sometimes difficult to navigate. To find them enter the document type. DO NOT enter the equipment type nor the equipment model just select and enter the accessory needed in the accessories column. Then scroll down until you find the one you need.
If you want to purchase them:
Blade parts book & OMI 
www.ebay.com/itm/375041500436
www.ebay.com/itm/114918359222
Hydraulic system parts book & OMI
www.ebay.com/itm/285580550854
www.ebay.com/itm/126217369080

 

Thanks for the info and links, Craig!  

Scott

D8Dude wrote:

Bulletpruf,
You asked if the main clutch could be stuck, that's very unlikely, this model of D7 has an oil immersed clutch, it's highly likely to be dragging somewhat with the cold oil in it. I think it's at about 12:49 minute mark in your YouTube video, there's a dipstick in front of your left foot, if my eyes are not mistaken, that's the dipstick for checking the oil level in the main clutch.

Will and I are headed back out there tomorrow morning.

Before I try to start it again, I plan to check the oil level in the clutch.  If it's low, I plan to use 30 wt transmission oil. 

On a related note, I'm still concerned that the clutch is hanging up.  @Deas Plant mentioned earlier that this tractor doesn't have a live PTO so with the clutch disengaged, the winch shouldn't spin, right?  It looks like there's an inspection cover on top of the clutch.  If I take this off, I should be able to verify what's going on.  Any tips on freeing the clutch if it is indeed hung up?

Plan is also to try to get the winch disengaged.  Anyway, it has two side covers that unbolt for access; a large one and a small one, both on the left side.  Based on what I'm seeing in the manual, I can remove smaller cover and access a lever to disengage the clutch.

Also picked up a heavy duty 12/24v jump pack from HF.

Thanks,

Scott