Has anyone opened their Quiet Diesel generator to replace the belts and coolant hoses?
Our generator, a HDKA 7.5 kw is now about 11 years old and I think in need of new coolant hoses and belts. I do not have a manual but believe in order to change them I need to remove the top and/or side of the generator sound proof enclosure for access to the belts and hoses.
Has anyone done this and can you give me some advice as to how best to approach? Our generator is located at the front of the mh and is mounted on a slide out tray.
Your advice is appreciated.
Moved to Tech Issues forum from DIY.
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edited 03/14/12 08:01am by an administrator/moderator *
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While I haven't got that particular model, I think that you'll find that most systems are the same when it comes to this maintenance.
You will have to figure what is the best way to access the engine, so that you can remove those parts. I agree that with that many years on it, it's over-due for replacement. Personally, I think that hoses and belts should get the same look that tires get....7-8 year MAX...no matter how they look. It's still rubber that can break down over time, and better to replace now, than get stuck at some CG without your A/C in the middle of summer heat!
You may need to get a special tool, to move the Tension pulley (if you have one), but they are fairly cheap, and you'll be glad you did.
I would also recommend drawing out the way the belt is situated, unless it is a basic two pulley design. A photograph is always good too. You'd be amazed at how quickly you realize that you've forgotten just how the darn thing goes
Check the clamps, and replace them too, if they are worn, or if they are not the screw type. Some of the older units have those "tension ring" type, and they lose their effectiveness over time.d
I'd also replace the Anti-freeze mixture when you drain the engine to replace the hoses. Who knows when that was done last?
Take your time....read up about it, on-line, and maybe even talk with a Tech when you go to get the parts. Most of the time, they will be pretty helpful. This is probably a fairly simple DIY project, depending on your mechanical abilities. It probably should take about an hour, if you've got all the tools and parts.
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While the above information is well intentioned it is also very generic.
Recommend that you download the service manual for your gen as this will give you a lot on information. First things first - disconnect 12V and any auto start capability. You may find restricted access to the gen depening upon your slide out capability. You will need to remove the panels and access to the back of the gen.
Get the correct parts as some are important like the correct belt what has no tension mechanism.
Well, I completed the work and feel good about it. It did take a little longer than I had estimated--about 6 hours and about $200 for parts from Onan. I replaced all hoses, the radiator cap and the water pump drive belt.
I did not remove the generator from the coach but pulled out the slide and removed the top, right and front panels from the 7.5 kw Quiet Diesel. This opened up the unit so I could access the hoses and belt. I did have to remove the mufflers so that I could gain access to the lower engine hose. The mufflers were relatively easy to remove as all nuts came loose easily.
Biggest problem was getting the panels off with all the wiring in the way and very cramped spaces.