resealing cooling fans

Topic: resealing cooling fans (Read 851 times) previous topic - next topic

resealing cooling fans

March 24, 2022, 10:52:54 pm

I started on the job this afternoon. Drained the radiator and removed one of the cooler
pipes and got the JIC fittings on the cooler loose. I used a floor jack on a 18 inch
crescent as there was no room for a cheater. It work really good with the help of a 4
lb. hammer.

Re: resealing cooling fans

Reply #1 – March 27, 2022, 07:35:34 pm

I got the cooler out yesterday so that's out of the way. I got all the hoses off this afternoon
and letting everything drain. It's a messy job, so hopefully the oil will all drain and I can get the
fans out without oil pouring on me. I bought some degreaser awhile ago and it cleans up the
mess quite well. It is not a fun job.

Re: resealing cooling fans

Reply #2 – March 27, 2022, 07:39:49 pm

My fans seep, same as a couple of years ago when I got the coach. As long as they seep, I will keep watching. When I start seeing drips...

I am watching your posts and will learn from them.

Re: resealing cooling fans

Reply #3 – March 27, 2022, 08:01:21 pm

That's what mine where doing since I bought it too and as I have the time to do it I
thought just get at it. It's not a job I was looking forward to. I will change the oil and
filters for the transmission at the same time.

Re: resealing cooling fans

Reply #4 – March 27, 2022, 10:18:09 pm

Quote from: oldguy – March 27, 2022, 08:01:21 pm

That's what mine where doing since I bought it too and as I have the time to do it I
thought just get at it. It's not a job I was looking forward to. I will change the oil and
filters for the transmission at the same time.

I have bought the fan motor seals, and I may try to tackle the job this summer. We don't do much traveling when it is hot, so I can take my time with it.

The first time I looked at it, the job seemed impossible. A few months ago, I spent some time scraping off the residue from the area. I got more familiar, and it seems less scary now. I do think it would be easier if we could stand up, and not be on our backs and reaching up.

We share the air bag tools... Can someone mail me a 40,000 pound lift?

Re: resealing cooling fans

Reply #5 – March 27, 2022, 11:02:03 pm

A lift or a pit would be great. I used a 11/4 open end end of a combination wrench for
the hydraulic fittings and a bent open end wrench would be handy and maybe necessary.

Re: resealing cooling fans

Reply #6 – March 27, 2022, 11:48:55 pm

Quote from: oldguy – March 27, 2022, 11:02:03 pm

A lift or a pit would be great. I used a 11/4 open end end of a combination wrench for
the hydraulic fittings and a bent open end wrench would be handy and maybe necessary.

I use several sizes of a crow's foot for the hydraulic lines and for the fuel fittings on the top of the diesel fuel tank that I have trouble reaching. Those and a 1/2" or 3/8" extension make breaking them loose easy. Once a JIC/AN fitting has be loosened even a tiny bit, they spin off with a couple of fingers. Examples: https://www.amazon.com/crows-foot-wrenches/s?k=crows+foot+wrenches

Pierce

Re: resealing cooling fans

Reply #7 – March 28, 2022, 05:06:25 pm

Do you carry both the jumbo and standard size crow's foot wrenches?

Re: resealing cooling fans

Reply #8 – March 28, 2022, 05:27:52 pm

Quote from: oldguy – March 27, 2022, 11:02:03 pm

A lift or a pit would be great. I used a 11/4 open end end of a combination wrench for
the hydraulic fittings and a bent open end wrench would be handy and maybe necessary.

I used wood blocks and backed up on them to get some height. No special wrenches needed just a lot of tools.

hydraulic fan motor

Re: resealing cooling fans

Reply #9 – March 28, 2022, 07:44:37 pm

There is a thread from about 2 years ago started by Mister Ed that many joined in on and was very informative for replacing the fan seals. It includes McMaster-Carr part numbers. That thread was my inspiration to do my seal replacement, and they have been dry since.

Re: resealing cooling fans

Reply #10 – March 28, 2022, 09:29:57 pm

Got the fans out today and that part of the job was not bad. I expected the top bolts to
be hard to get at but they were easy. Lots of cleaning up as with oil seeping and dust it
makes quite a mess. Got one of the seals out and there are numbers so that will make
it easier at the seal store. Chuck is right, I got it apart without any fancy tools. There is one
fitting that if I had a 11/4 angle open end it would make it easier and if it was really seized
on it might be necessary.

Re: resealing cooling fans

Reply #11 – March 28, 2022, 10:38:43 pm

Peter, if you have any trouble finding the seals, McMaster-Carr carries them. Below is the link with the part number and seal sizing.

McMaster-Carr

Re: resealing cooling fans

Reply #12 – March 28, 2022, 10:40:02 pm

And quite a bit of work for a $4 seal

Re: resealing cooling fans

Reply #13 – March 28, 2022, 11:19:11 pm

Thanks Mark now the numbers I got off the seal make sense. The repair is cheap.
Getting to do the reseal would cost a lot if I had to pay someone to do the job.

Re: resealing cooling fans

Reply #14 – March 30, 2022, 07:55:45 pm

Picked up the new seals today. I was looking at the flow pattern of the motors and the
front motor is the lead motor and they run in series. I'm thinking of replacing the top hose
between the motors as it is still a pressure hose and the hose from the pump to the lead
motor I replaced as it blew.

Re: resealing cooling fans

Reply #15 – April 25, 2022, 10:21:43 am

Got the fans all back in and hooked up. Now I have to figure out what kind of oil to use.
I have been using Rotella T4 but that is not available right now.

Re: resealing cooling fans

Reply #16 – April 25, 2022, 10:37:10 am

Delo 400 15-40 was the OE oil in most of these systems. That would be Plan B.

Plan C would be any CK-4 15-40 (same as your Cummins engine).

Most hydraulic reservoirs have a label for exactly what fluid is in there.

And, assume you are changing the filters and lid gasket.

Re: resealing cooling fans

Reply #17 – April 25, 2022, 11:59:49 am

I've got new filters and haven't got a new o ring yet;

Re: resealing cooling fans

Reply #18 – April 25, 2022, 12:15:00 pm

I just phoned chevron and there is no dealers in the lower mainland so I will figure out
a different oil for the hydraulics.

Re: resealing cooling fans

Reply #19 – April 25, 2022, 12:36:17 pm

Barring supply chain issues Walmart usually stocks both Shell Rotella T and Delo 400 15-40.

Supply chain issues-- no idea.

But as posted, any 15-40 diesel motor oil can be substituted.

Re: resealing cooling fans

Reply #20 – April 25, 2022, 01:06:39 pm

Walmart in Canada doesn't carry Delo 400 I might get Valvoline at Cummins

Re: resealing cooling fans

Reply #21 – April 25, 2022, 02:05:17 pm

Quote from: oldguy – April 25, 2022, 01:06:39 pm

Walmart in Canada doesn't carry Delo 400 I might get Valvoline at Cummins

This isn't right. No mail order either? Last time I purchased there was none to be found, ordered on line Walmart and showed up two days later
Scott

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