F/R switch... There is a new design now. The switch will have an s on the side of the new ones. They put a piece of steel shaft in the center of the thumb lever. Should take care of most problems. They still wear out though. The drivers need to be a little conservative and they will last longer. I know the old ones could be slammed but those days are gone. I guess the new ones are for the driver in his place of zen.
I may need your help to keep these going :-)
So far they have blown tilt cylinders (internally), trans. pumps blew a leak, lockoffs gone bad, f and r switch, seat switch, radiator leak, and a fork carriage bent like a pretzel (nobody knows how that happened).
I work with a dealer here.
I'm an independent repair service
mrfixit. you said 3 trucks. Are you with a yale dealer or other?
I actually did that fix already. I have the fortune of having Resident engineering in my back yard. That is what they wanted me to try but did not take care of problem. There was also a problem with the wires going down to the coils were assembled too short causing the wires to rub on the side shorting it out. Caused it to backfire also. But unfortunately I ended up being right. It was just poor maintenance by the company. I fell for the we just did a tune up a while ago. After going through the motions I checked the plugs and all the amenities and figured out I was temporarily an idiot for listening to them. Made the repair and Vuala<--(sp?).
The 3 that I service do the same thing as your's. Two of them run all the time and I didn't realize how quick the plugs wear out. Then a huge backfire and it blew the carb diaphram. There was a service bulletin about the coils not being insulated good enough and you should remove them and apply silicone sealer under them.
I had a problem on a similar truck where the plugs weren't changed regularly and it caused some extensive backfiring. The Air filter was clogged horribly and when the backfire occured it transfered pressure to the regulator through the balance line damaging the seals in the regulator. I rebuilt the regulator and it took care of it. Obviously this isn't your exact cause but when they are overheated and poorly taken care of they will start to backfire like crazy.( I have A LOT of experience with these trucks).
This machine has the regular filter in the hose bulkhead and one in the regulator also. I see code 522660-0 too. I think the carb may be the problem. It runs 24/7 and has 7500 hours on it in 15 months.
Hi Robb
I read the error Hyster Ft
Early defect in the fuel lean
PSI has helped me always directly connected to the ECM
This machine has a secondary LPG fuel filter?
DTC 522655-0 - Short Term Closed Loop Correction Bank 1 Less Than NOR -40% (Rich Engine
Operation)
CAUSE B - PROBLEMS THAT MAY CAUSE RICH ENGINE OPERATION
PROCEDURE OR ACTION:
1. Common problems that may cause rich codes:
* Clogged/dirty air filter
* Fuel quality (Very high butane content)
* Operation at high altitudes
* High primary fuel pressure (for trim fuel injector)
* Faulty trim fuel injector or wiring
* Faulty LPG carburetor (power valve stuck open)
* Faulty LPG regulator
* Manifold vacuum leaks
* Improper ECU grounds on engine block
* Faulty ECU injector driver 2
2. If DTC continues to be displayed after examining/correcting the above, go to Cause C.
CAUSE C - SENSOR FAILURE
PROCEDURE OR ACTION:
1. Ensure truck power is OFF.
2. Replace sensor.
NOTE: Do not discard original sensor after removal.
3. Ensure that all connections are completely inserted.
4. Turn truck power ON.
Does reported DTC reoccur?
YES: Reinstall original sensor and go to Cause D. See Electrical System 2200 YRM 1142.
NO: Problem has been corrected. Resume operation. Discard faulty sensor.
CAUSE D - FUNCTIONAL FAILURE IN CONTROLLER
PROCEDURE OR ACTION:
1. Ensure all previous procedures have been completed.
2. Ensure truck power is OFF.
3. Ensure that all connections to the controller are completely inserted.
4. Ensure truck power is OFF for no less than 30 seconds, and then to ON to clear displayed DTC.
Does reported DTC reoccur?
YES: Go to Step 5.
NO: Problem corrected. Resume operation.
5. At the DSC, press ENTER to access Main Menu.
6. Scroll to VIEW VERSIONS, press ENTER.
7. Scroll to TRUCK SERIAL NUMBER, press ENTER.
The following procedure does not specifically address the troubleshooting of the oxygen (O2) sensor circuit
but provides information relating to symptoms and other DTCs that need to be examined or resolved that may cause
this DTC to be displayed.
1. Common problems that may cause lean codes:
* Sensor wires contacting exhaust manifold pipe
* Vacuum leaks
* Exhaust leaks
* Low fuel pressure
* Contaminated or spoiled fuel
* Dirty injectors or faulty injector driver
* Improper ECU grounds at battery or frame