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Onan 2800 gen runs when RV pointed downhill
I decided to start a fresh thread on my Onan 2800 generator issue because I¡¯ve got a very repeatable hint. The problem is that as long as the Dolphin is parked on the very slightest front end downhill slope the generator runs perfectly. The gas tank is full and the oil level in the generator is correct. But when the Dolphin is level or just slightly angled with its front end uphill (as little as 2 or 3 degrees tilt) the generator sounds starved for gas and won¡¯t keep running. Very strange indeed. I previously confirmed that the fuel pump was working by pulling the gas line off of the carburetor and viewing the healthy gas flow. With that pump test done I went ahead and changed out the carburetor but the angle sensitivity is still present. Now back from a few days on the road (deliberately parking down hill) I will reproduce the ¡°uphill issue¡± and pull the gas line to absolutely confirm the pump is pumping when the problem is happening. Anyone ever experience this angle sensitivity even when your gas tank is full and the gen oil level is correct?
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Re: 1991 Warrior V6, valve adjustment and wheel repacks, cost?
It depends on what the shop means by repack/reseal wheel bearings.
For the common definition (remove bearings,? clean and re-grease, reinstall), the estimates are WAY too high. If their definition includes replacing the brakes (new rotors/drums, new pads/shoes) and entirely new bearings, bearing races, and seals, then maybe their estimates are more reasonable. if you are at all handy and have common automotive hand tools, this is the sort of job you can do yourself. The valve adjustement estimate seems more reasonable. There's a lot of stuff that has to be removed to get at the valve covers, so that takes time. The estimates for other work are common practice. The don't know the history of the vehicle, so some suggested work is based upon recommended maintenance intervals or "this is about the age/mileage these parts fail" Other reasons for the high estimate for the bearings (and other work) could include: 1) They are estimating the "worst case scenario" where the bearings have failed and spewed grease all over the brakes, requiring all the work I described above. The actual bill if it's a simple remove-regrease-reinstall? may be lower. 2) They actually don't want to work on your Toyhome, so they're trying to scare you off (or make bank if they have to work on it) 3) They've taken a financial hit elsewhere in the business and are trying to cover the losses by raising prices on other customers. This is a common retail practice. For example, your local supermarket doesn't sell $6 frozen pizzas at two for $5 because their costs went down. Someone somewhere is paying a higher price for something to make up the difference. If you cannot find someone to do the wheel bearing repack at a more reasonable cost, I suggest neglecting it. Repacking bearings is good maintenance practice, but it is NOT absolutely essential. The failure mode is the bearing grease gets old/dirty/sticky, which causes the bearings to start wearing away. As the bearings wear, they will make more and more noise giving you PLENTY of warning that they are going bad. If that happens and you need to replace a worn bearing, it will cost you about what you were quoted to "repack" them.? Unless you ignore them while they are howling like mad, this is not something that's going to strand you somewhere. Good luck, Buzz L. Phoenix, AZ Former '86 Dolphin, '89 HiLux, and '96 Tacoma owner |
Re: 1991 Warrior V6, valve adjustment and wheel repacks, cost?
When I was pumping gas for a living back in the late 1960's, I repacked my share of front wheel bearings for customers, and yeah, it shouldn't take more than a couple of hours max I would think.
The rear, I don't know.? I never did rear wheel bearing repacks.? In those days everything was rear wheel drive and if I recall correctly (been a LONG time) the rear wheels got plenty of lubrication from the differential oil. So, on the (rear wheel drive) toyhouse, do the rear wheel bearings need to be separately repacked?? How much more is involved in doing those than the front? |
Re: 1991 Warrior V6, valve adjustment and wheel repacks, cost?
They didn't say, but I think their shop rate is something like $135 an hour (that could be wrong.... seems high).
I asked them specifically for an estimate for the valve adjustment and wheel repacks and if you would like a morning laugh, here was their reply (names deleted to protect the guilty): ?= = = = = = = =
Total for all was just south of $5000.? For the valves and wheel repacks, $2681.74. The timing belt, water pump and radiator hoses were done less than 25,000 miles ago so I'm not considering them. I can get my regular mechanic to do it for considerably less but he's too busy right now to fit me in.? So, I'm asking around. |
Re: 1991 Warrior V6, valve adjustment and wheel repacks, cost?
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I just got a quote of $2681.74 to do the 60K-mile valve adjustment and wheel bearing repacks on the toyhouse V6.? Seems kind of excessive... what do you all think? |
Re: Lifetime of rear air bags?
All things made of rubber eventually deteriorate.
The rubber air suspenion bags on ToyHomes have the advantage of NOT being exposed to very high temperatures, heat cycling, or corrosive chemicals. Being under the chassis, their exposure to UV radiation is also minimized. Deterioration from ozone depends where the vehicle spends most of its time. If it's parked in an area with significant photochemical smog, the rubber will degrade sooner than areas with better air quality. (Side note: The U-2 spy plane had problems with hydraulic fluid leaks when it was first developed. Lockheed engineers figured out the terrible smog in Burbank, CA (Where it was built) was attacking the rubber seals in the hydrualic system. They had to replace the natural rubber seals with silicone rubber seals to fix the problem). The good news is rubber tends to deteriorate gradually, so a sudden blowout of the airbags is unlikely. Even if one does, you can still drive the vehicle. You should get it replaced as soon as you can, but a bag failure is unlikely to cause damage which would leave the vehicle stranded. Buzz L. Phoenix, AZ Former '86 Dolphin, '89 HiLux, and '96 Tacoma owner |
Toyota Motorhome Price reduced for Quick Sale
Vintage Toyota SandTana Motor Home Runs Strong the undercarriage is rusty but can be protected with a coat of rust oleum. |
Re: Lifetime of rear air bags?
I had a slow leak on one side and used a spray bottle with soapy water to check over everything. Found a very small bubble leak on a hose connection and tightened it up. Since then they hold air for a few weeks it seems. This may also show very small cracks in the rubber. At another time one of the filler valve stems had a very slow intermittent leak. On Mon, Jul 10, 2023 at 10:41?AM Doug Hertzog via <itsuptoyoudad=[email protected]> wrote:
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Re: Lifetime of rear air bags?
I guess we are all on borrowed time, but the terms of our loans may vary. All joking aside, "I don't know" would be a better answer.? I do know that they are made of good heavy rubber, and the fact that they are in the shade should help them live longer. Just getting down there with a good light and looking at them, and feeling them with your bare hands can give you some idea how healthy they are. Cracking even on the surface, would be an indicator that they are aging, (but you already know that haha). What tends to do them in is driving with little or no air in them, especially over rough roads or terrain.? |
Re: Lifetime of rear air bags?
Thanks, Doug.? I have replaced and retightened the valve stem inserts.? I haven't troubleshot it further but it's not critical.
My question is more general in nature... do these airbags come with a useful life?? Mine are probably 32 years old and definitely at least 23 years old,,, is there a point beyond which the bags should be considered on borowed time? |
Re: Lifetime of rear air bags?
It will be either a fitting/connection point as suggest Tika,? or the valve stem.?? Either can be isolated by using something like "Snoop" that is made to find small propane leaks or even plain dish soap will usually work fine.? The valve stem may just be loose and can be tightened with the little notched tip found on most metal and some plastic valve stem caps I have seen.? If the bag itself was leaking it would be flat far sooner than a couple of days. Probably within minutes. (I think)? ![]() |
Re: Onan Cummins Microlite 2800 carb question
RZ Where is the crankcase breather? ?And how do I assess a ¡°blockage¡±? Easily done visually?
The 2800 generator with its brand new carburetor and fuel filter ran perfectly for perhaps three accumulated hours but now it¡¯s back to its maddening intermittent behavior once again. Everything has been changed out and checked. I¡¯ll try substituting an external fuel source but I¡¯m at my wits end with this. Too many hours. Too many disappointments while camping, like right now. Just use a totally reliable portable generator instead. Giant mobile paperweight.? |