Radiator Repair

[cmillsap]

(04-25-2015 00:27)GregOConnor Wrote:  A member of my RV Club with a HolidayRambler series 60 had a fan come off the fan motor 200 miles out of the shop from a radiator rodding. My thinking was that the shop used the old lock washers?? they then installed a new radiator and the member asked me to check their work. I found that the fan was in backwards. After speaking with the shop tec he thinks the old fan was also in backwards but there is no way to know for sure. Quite a bit to check with the fan hose and spring clamp engineered torque. Looks like they did a good job. Did you pull the fan out the bumper or out the side? I see a bumper in one image?

I plan to do this project next month.

(04-24-2015 19:34)cmillsap Wrote:  Here are some more pics of the radiator ready to install.

Rather than spend too much time trying to experiment with the location of the fan to try to get better cooling, We're just going to stay with the fan located 2/3rd inside and 1/3rd outside for the time being. We're going to run the bus up Cajon pass a couple of times to determine if the cooling is sufficient. If not, then we will experiment with the fan/shroud design and possible adding an ring to the shroud.

The last two pics will show where we decided to leave it for now.

Greg,

I owned a Safari Sahara with a rear radiated system back several years ago and was having trouble with it overheating. I called the factory, the first thing they asked me was which way were the fan blades pointed. Turns out that many motorhomes are equipped with a fan that is capable of being mounted either way to be a pusher or puller. That wasn't my problem but they told me that it happens a lot.

We looked at both ways and decided it was easier to remove the rear bumper and pull the Rad/CAC assembly out through the rear. I think that's easier than trying to remove the assembly from the side. David used a motorcycle jack and removed his Rad from the side because it wasn't possible for him (by himself) to get it out the back. That was a big job for one guy. After seeing the work involved in removing mine, I don't know how he did it.

I hoping to get the bus back on the road on Monday, if all goes well during the hill climb cooling test. I have a Silverleaf connected to the ECU so we can watch it closely. I have noticed (by using the Silverleaf ) that the analog coolant temp gage is just not very precise and lags behind the actual temp rise a bit.

Chuck