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I have a 1998 FL70 with a CAT 3126. The air pressure wont build up over somewhere around 10psi and it sounds like there is air hissing from inside the compressor. I had the old governor in my toolbox and swapped that out and also an old unloader valve kit. I also noticed on oil leak on the front...

I have a 1998 FL 70 with a 3126 in it. It is starting to leak air out of the top plate (?) of the air compressor. There are 3 bolts I believe that secure the plate/cover. Do they make a kit for this or should I replace the compressor?

I have a 1998 Freightliner FL70 with a 3126 in it. The truck has ran great until recently. This problem has been intermittent......someitmes it starts right up then other times it will take a second (acts like it has air in it) rough idle then die. The only way it will start again is if I take...

I have a 1998 FL70 with (2) 100 gallon square steel fuel tanks. Here lately it seems like I'm beginning to see some rust looking particles in the bottom of my water/fuel filter. How hard or would you get a couple of round aluminum fuel tanks the same length and replace them with those. My...

I have a 1998 FL70 and the power windows aren't working (they were) and I'm trying to locate the fuse for them (or what they are tied in with). I've looked over the owner's manual fuse box diagram ad nauseum. Any suggestions? Thanks in advance.

I have a 1998 FL70 with a 3126. Anyway, my fuel tanks are 100 gallons each. My fuel tanks are not equalizing. I have about 80 gallons of diesel in my passenger side tank and not very much in my drivers side tank. I did blow the vent lines out on each tank to make sure they were clear...

I need to replace my muffler on my '98 FL70 with a 3126. My current one has holes in it. Anyway, I called Freightliner and they want $328 for it? Whats special about that muffler and why couldn't I replace it with something from someplace like Ryder Fleet products with the same dimensions...

Recently I disconnected my battery cables, pulled the speedometer out to look for something else and now my check engine light and engine heater light won't go out and the code it flashes is 49 which is "Inlet Air Heater Driver Fault" (open/closed circuit) or something like that. I called CAT...

I have a 1998 FL70, 3126 that keeps giving me from time to time a "31" code. According to the engine Operation and Maintenance Manual its the code for "Loss of Vehicle Speed Signal" does anyone have any ideas about this? Problems, symptoms, location of sensor and what to do about it...

I recently bought a truck that had a Tag-A-Long apu on it. Well, I understand they are out of business and I'm looking for an owners manual or wiring schematic for one. For the life of me I can't get any electricity to the plugs. The generator starts and runs good. The tattle tales aren't...