once again see edwardt's post

parrot here :oD

system runs hot, makes compounds added to propane separate and it is like an oily residue that builds up. I've known some people to add an inline thermostat inline with the hoses to the regulator to help keep it cooler.

To clean it use a contact cleaner or some sort, something that evaporates fast and is non corrosive. Harsh chemicals will damage seals etc so stay away from them. Brakecleaner? carb cleaner? bad bad bad

good luck

Hi, I have experienced some problem with a yale 2006 I sale. There is oil in regulator. I have clean it. The injector can be cleaned with any injector cleaner? We can damage it if we don't use good stuff? Thanks for reply

hello William_b

do you have any more information on the filters you used for this issue, we are having severe problems in Canada and are looking for any solution possible!

Its not oil from the odorant they put in to add a smell to the fuel.

It heavier fuels that are in the propane that are "falling out of the fuel". We experience it all the time. We have developed filter to remove these heavy ends. We have filters that can be put on the storage tank to stop them at the source. We also have additives that dissolve the heavy ends and flush them through

see edwardt's post

hate's to be a parrot but...
;o)

good job man,lot of work

I service Yales/Hysters (the new identical trucks, different badge) with the fuel injected GM 2.4. After a LONG process of investigation I found a couple of things. First- the fuel is not as clean as it needs to be for these newer systems- no matter what you buy it or where you buy it. Second- The fuel system on these newer Hysters/Yales is sourced from European sources from the automotive industry- the challenge is they didn't include the filters that are installed on the automotive equivalent.

After going round & round about dirty fuel, adding filters, adding injector cleaner to the LP etc. I made the following deal with the customer- I would modify the LP system at no initial charge- if the changes allowed the lifts to run for 6 months with no LP related problems- I would then invoice them for the total of work done- adding 1.5% per month for the 5 months that I held the invoicing ( the lifts would run about 2 months before needing a new regulator & 4 new injectors- total parts of about 1500.00).

The modifications were: adding a thermostat in the coolant line coming from the regulator, machining the injector openings.010 more open, adjusting the regulator to a lower pressure to compensate for the added flow, adding cooling vents in the hood assy, adding a coalescing filter between the regulator & injectors & finally- adding a fuel injector cleaner to the filter assy at every PM (every 200 hrs).

So far we're at about 8 months with no LP issues. Customer was reluctant to allow the modifications but now is very happy with the reduced costs & downtime of the units.

It is up to the propane tank distributor to clean out their tanks periodically..Yale replacement stone filter for the injector is #580055163

I hope everyone recognizes this thread's original question was posted in 2005. And I sure hope they have not continued to have these problems.
The "oil" in an LPG system is a byproduct of the temp. It is from a molecular/chemical/heat reaction that "cracks out" the oil from the gas molecules at temps above about 130f, but the higher the temp, the more oil cracks out. (that is in part how we refine oil). The "LPG thermostat" goes into the coolant line _out_ from the regulator to the engine, not the line -in- to the regulator. it closes at it's rated temp (usually about 160F), and opens at lower temps. This allows the expansion of the LPG gas to cool off the regulator to a temp less than the 180F+ that the motor coolant is kept at by the engine coolant thermostat.
Since it is a physics/chemical property of heat that causes the oil to "crack out" at the molecule level, I would doubt that any additive would actually eliminate it, although I can see how a solvent might wash it through the system, however, I would want to see the regulator manufacturer's opinion of how save it is for the seal and other parts of the regulator before I added it to any of the units I care for.
Like they say in the car commercials, -your- mileage may vary.

There are two products available for these issues. One is an inline filter that has been developed. The other product is CGX-4 additive which can be added to the propane to dissolve the oil ( heavy ends) and flush through the system. I can help anyone find these items

We run about 65 Toyota's. All the ones with the Asain vaporizer have this oiling problem from the fuel I changed a couple back to impco and have not had that problem any more with those two trucks. So guess whats goning to happen. LOL But all our trucks have carbs. so I don't know if that would work for injection.

Yale does sell a filter for the Aisan regulater, pn 5800171-90. Approx $35. Also they do recomend draining the oil from regulater evey 250 hrs.

I just want to touch on what the use of the thermostat is used for in a LP fuel system. The thermostat is open when the coolant temp is low allowing the coolant to enter the vaporizer unrestricted. As the temp. increases over the LP cracking point the LP thermostat restricts coolant flow holding the vaporizer tempature @ 160-170 f. Most manufactures have removed the in line thermostats from the LP systems and have mandated vaporizer draining intervals ranging from 200 to 500 hours to remove the buildup of propalene (crud).

You would think that more manufacturers with proprietary drive and control systems wouldnt sell their handsets to other companies. Seems somewhat logical from a company minded standpoint, but the customers are going to realize that they arent being treated fairly.

Take a company like walgreens. They have anywhere between 100 and 160 trucks are their distribution centers spread all over the country. They primarily have Crown Turret trucks, but some locations have Raymonds. Figure its a 50/50 mix nation wide. They do their own in house maintenance. I wonder what their response would be if Crown said "We arent going to sell you the service terminals for the turret trucks". My thought is they would reply, "Well, guess we better call Raymond." Recently a Raymond service tech picked up a Crown service terminal from the local Crown dealer. I was shocked that they would sell such an item to their biggest competitor. Apparantly they are more concerned with getting a customers truck fixed, even if they arent servicing it. Perhaps they feel that such a move will lead to another Crown sale. Then again, ther service terminals arent cheap, so perhaps they are just looking for the sale.

I look at it like this, we all have to work somewhere, and it pays to at least be helpful in some form.

I have much better relations with the local Hyster dealer than Yale. I even get a parts priceing break with we in turn give to them as well. You arent doing the work, but you are still selling the part.

Going to try and cool the regulators down some. I have an IR thermometor to measure temperature, so I am going to shoot for the 175 degree. Truck has a std engine thermostat, I wonder what the temp of the engine t-stat is? Maybe droping a bit on that temp would help.

Going to have my customer ask if the Yale dealer has the said handset and cables in thier service tool inventory. And to ask if they can buy one. Should be interesting.

Anyone hear anything about the fan issues on the new line of trucks from Nacco? I heard that was the reason for the delay in getting the new series trucks to market.

James, while I do realize the importance of what you are saying, having trucks that can only run 12-15 hours before needing repair isnt a viable option for anyone.

There has to be a solution somewhere, the trucks are passed their warranty period, so that isnt a concern.

Its difficult to run a business when you cant ship your product out of your truck dock.

Had the local Yale dealer done more to help rectify the situation up front, perhaps this customer wouldnt be in this situation.

Fuel quality is a big issue as of late. There doesnt seem to be alot of consistancy in fuel from source to source. I checked into this quite a bit on behalf of this customer and many fuel supply companies are concerned about fuel quality. Even HD5 spec doesnt guarantee that you are running good fuel. There are too many sources for possible contamination. This seems to be a problem for Yale/Hyster in the western part of the US with companies that have large storage tanks. Even though all the fuel essentially comes from the same pipelines in a given area, how its stored and transferred can lead to contamination. This is info right from fuel suppliers, not just hearsay. Of course the local fuel supplier says his fuel is fine. Fuel companies say that storage tanks are in need of cleaning every 50 years. this customers storage tank was cleaned less than 15 years ago. So if storage tank cleaning is an issue, when was the last time that the fuel supplier had a tank cleaning? if the fuel at the supplier has too much oil, then so will the fuel at the end user. This fuel doesnt just sit in this customers tank, the go through 50 tanks a day, running three shifts.

Had Yale (Nacco) done more research they would have seen that fuel quality could be an issue, and perhaps not designed a truck that isnt robust enough to accept poor fuel. This doesnt happen to other manufacturers trucks, such as Nissan whose fuel injected propane engine in my opinion is the best on the market. Quite frankly, the fuel injector is of poor quality. After taking apart a fuel system on one of these trucks, the injector is a very low cost, tempermental part, requiring a filter of such a small micron that its almost quaranteed to plug. The filter is also very small in physical size, meaning that there is less filter volume, and therby less material is required to plug the filter.

After having tested the customers fuel by an independant source, there was not excessive amounts of oil or contaminants in the fuel. Also, they have taken these trucks and run them on new aluminum tanks, with fuel supplied directly from the source and still have this problem. One truck was sent into the Yale dealer for a complete fuel system cleaning and rebuilding. Totalling $1400 ( all billed to the customer) the truck came back with a tank from the Yale dealer on it and ran about 12 hours, before plugging the filter up.

As to the carb issues, the Yale parts book lists a thermostat for the regulator. These trucks dont have it installed, but since its in the parts book it seems that installing it shouldnt affect the emissions. This is a California emissions truck that isnt being unsed in CA.

No other customer in this vicinity has trucks equipped like these, meaning they havent sold any more like it in this area. The new trucks Yale is selling now are slightly different in configuration, they are all fuel injected (not fuel injected/carbureted) but the Yale dealer wont tell the customer if it has the same cruddy injector for the start/idle circuit, of it is has the same fuel filter as these trucks.

Calls to Yale directly do not get replies, they keep referring them to the dealer. This is terrible customer service on Yales part.