Backhoe 758C Backhoe lower swing bearing lube problem

Tractorganic · Apr 20, 2016

I haven't been able to get grease through the zerk of the lower swing cylinder bearing (item #16 pg. page 14 lube chart 2003 NH 758C backhoe Op. Manual). I removed the zerk, sprayed hole w./B Blaster and used a round file handle to clean out the hole some. I did the same on upper fitting #15 and found that the probe went in deeper than #16. Maybe the hole into the #16 bushing is not lining up with the zerk hole aka. a rotated bushing. I read a post on a heavy equipment forum "worse case scenario could be that your bushings have turned. then the holes don't line up. one method for this is to remove the pin and zerk, then drill through the zerk hole and through the bushing. then reassemble." Anyone know if this is a good way to proceed? I don't know how to disassemble the bushing to realign the holes. Maybe just working the swing and applying continuous grease gun pressure might find the bushing hole. Anyone had this problem?

FredH · Apr 22, 2016

A lot of times on my 757 , I have to apply opposite pressure to get grease in several of the zerks . Meaning this , You are looking straight ahead at a clock , at the 9 o'clock position is the zerk , thus I rotate the B.H. / apply pressure via dipper / bucket / or even stabilizer to the 3 o'clock position to get the zerk to take grease . I would need to get my manual out or look online to see exactly which zerk you are having issue's with . Right now it is 02:41 in the morning and I am surprised I am being this coherent :confused3: . I use a lincoln air gun , pull tractor up in front of shop , keep it idling , start on 1 side and work my way around . By keeping the tractor idling , it is no big deal to reach over and bump the controls to do as I described above .

Fred H.

5030 · Apr 22, 2016

Replace the fitting, they are cheap.

joecdeere · Apr 23, 2016

Are you talking about the two bushings in the rod eye end? #22 in this parts drawing?
it does sound as if it has gotten dry and rotated.
If you look at the astronomical price they want for that bearing, I'd get busy trying to save it.
If it were mine, I would set the bucket down on a dolly or floor jack, turn tractor off work swing lever to remove all pressure.
then beat out the pin and use the dolly to ease(right!) the hoe around enough to be able to gain access to the bushings.
You may have to have someone to hold the joystick over to allow oil to move not knowing just how far you need it to move.
remove bushings and inspect and if usable clean and re-install. I don't mean to make this sound easy or anything like that, I've spent the better part of a weekend getting one pin coaxed
out on my 345c before. Be careful, you really need all 10 of those fingers!

New Holland (758C) - BACKHOE (6/-) Parts Diagrams

FredH · Apr 24, 2016

I knew at 0 dark thirty I would not be coherent !!! :confused2: I went out yesterday and greased my tractor and B.H. . Actually use the B.H. to press on the same side the zerk is on . In the diagram Joe shared , the left side zerk ( as you are sitting in the B.H. seat ) , I used the boom / bucket and pressed on the left side ground and pumped the grease in . Same for the right side .

I also have to do something similar for the bucket on the FEL , although No ground pressure is required there , just rotate the bucket down and the weight of bucket seems to free up enough space between bushing and zerk to allow flow .

I second the notion also on replacing zerk . I bought 2 different kits of zerks at H.F. . They have worked fine for Me . Although on my KK disk , those are pressed in type , thus when ever I replace one , I have to tap it for threads , then put the new one in .

Fred H.