D7e fan removal

Hi Team,
we used to pull the fans out the top as you describe after unbolting the blade cylinder cross shaft and necessary hoses and clamping suitable blanking plates over the hose and steel line ends, then moving it back some for clearance--tie and block as needed for safety.
I think I have seen that with the cross bar and cylinders suspended safety on a crane very carefully power the assembly back within the confines of the hose lengths and do as described.

Those reversible fans are a known cause of overheating when they have done many hours. The blades are reversible and yours is set as a blower fan--blows out the front-- the keys at the fan blade end in the hub and the slots they set into wear and the blades flatten out and so push less air.
They can be dismantled and the wear rectified or to get out of trouble simply reverse the blades to get full pitch but fan will be a sucker instead but may get you out of trouble for the time being--from memory the blades are recommended to be reversed periodically to clear trash from the radiator cores.
I will see what scans I have on these.

Cheers,
Eddie B.

Thanks for the scans and info. I’ve found if I run the fan to push during the summer months the cat runs a bit cooler and so do i lol. Once it starts to get colder out I switch it back again. I don’t have that tool but should make one so I don’t have to remove the side shield all the time. There is times where it would be nice to reverse it in the winter to blow the rad out a bit.

Sounds like I’ve got more work ahead of me either way unfortunately. Didn’t think there was a shortcut I was missing but was hoping.

May be worth your while to try and find a better pulley while you are into it. That one looks pretty worn and could be slipping quite a bit.
Merry Christmas

[quote="wimmera farmer post=234197 userid=732"]May be worth your while to try and find a better pulley while you are into it. That one looks pretty worn and could be slipping quite a bit.
Merry Christmas[/quote]
They are quite worn yes. I’ve been looking online for replacements but so far coming up empty handed. 

part numbers I think are
3s8415-fan pulley(confirmed with the numbers on the pulley) 
4s6837-crank pulley(unverified just going by sn.)
3s5036 or 7m7589 not sure which it is. Both parts diagrams look the same but have different numbers. Don’t have it off yet to verify.

All these numbers come up in the cat system but say indirect replacement available call dealer. Called dealer this afternoon though and they were a little clueless and just said nla. I did see one listed online for 353$ can’t remember which one it was now. Saw one used one in Australia as well.

Hi Team,
at the Dealer we often re-profiled the belt pulley grooves in our machine shop.
They had a few different shaped tools ground up especially to suit each size of belt groove--the outer diameter would be skimmed down too so the belts ran just above the top of the groove as I believe they were designed to do.
The root of the groove was lowered also to suit so the belts did not run on that bottom surface--obviously there are limits as to how much to remove before you break out the bottom of the groove.
Scan below has some dimensions that may or may not help.
Cheers,
Eddie B.

May be worth your while to try and find a better pulley while you are into it. That one looks pretty worn and could be slipping quite a bit.
Merry Christmas

Got the fan out today finally. Everything came apart fairly easily thankfully. Was afraid of getting to the bottom bolt but once the lower rad guard was removed it wasn’t to bad. Lifted it up and walked it out onto the track with the chain hoist. From there I just lifted it down and took it apart. Found out the bearings are fine and I’ll likely reuse them as they seem to be in perfect shape. The problem lies within the shaft. Bearings have gone out at some point in time and wore the end of the shaft. That or the spacer they put in is incorrect and it did t tighten in correctly. Thinking I’ll weld the shaft back up and turn it to size as new isn’t readily available here. [attachment=66083]F0DCE902-C8C9-4778-9C54-D0A37B435EE7.jpeg[/attachment][attachment=66084]C611AF5E-CA84-4147-B7B3-D5E09B6F6B18.jpeg[/attachment][attachment=66085]2F4B5638-729F-419D-ADB4-E39ED807C299.jpeg[/attachment]

American Crane and FP Smith both show having new and used 3S2121 shafts. I would also order a new 5M5957 spacer. Norcan Salvage shows having one [?] Disc from Cat.