Changing air filter on Freightliner 300hp ISB
- Thread starter jetfromtn
- Start date
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Gary RV_Wizard
Site Team
You have to reset the indicator yourself. You can do that anytime - it will re-indicate the status the next time you start the engine.
Changing an air filter on a big diesel can be a chore. It is is big, heavy, unwieldy and often hard to get at, but it is not rocket science. I've always paid to have it done, but am thinking about doing it myself this winter, when I do other maintenance (oil, oil filter, fuel filter, generator, etc.). But I shudder a bit when I think about it... I know it will be a struggle for this old fat man.
Changing an air filter on a big diesel can be a chore. It is is big, heavy, unwieldy and often hard to get at, but it is not rocket science. I've always paid to have it done, but am thinking about doing it myself this winter, when I do other maintenance (oil, oil filter, fuel filter, generator, etc.). But I shudder a bit when I think about it... I know it will be a struggle for this old fat man.
Utclmjmpr
Well-known member
You might be pleasantly surprised Gary,,on your American its not bad at all and a lot of room to work.>>>Dan 
Gary RV_Wizard
Site Team
It's also a job that takes at least three strong arms at the same time. On my '04 with the Freightliner chassis (most Americans are Spartans), it looks like you have to loosen everything, then drop it down underneath. Reverse that with the new one. Problem is holding it up while making the air hose connections on top and back side. Looks like a two man job to me! Strapping it down after is likely easy enough.
Utclmjmpr
Well-known member
AAH, my bad, I thought yours was the Spartan, my Spartan uses the right rear bay and is a snap.>>>Dan
catblaster
Well-known member
Shop around for that filter. NAPA wanted $213, RVchassis parts.com gets $119. I bought a Baldwin locally for $140. I can get beer and lottery tickets with the difference and still by the DW a rose on the way home.
Gary RV_Wizard
Site Team
Mine is in the left rear corner. Easy to see and easy enough to get at the snap straps, but awkward to lift out through the engine door. Dropping it straight down and out underneath seems easiest and no sweat to remove, but putting it backs means somebody underneath to lift it into place, while somebody else up top slides on the two air pipes and locks the retaining straps in place. I'm thinking maybe I can cobble up some sort of jack stand to hold it up while I do the upstairs work.
The right rear access door on mine has only the jack hydraulics and the muffler. Spartan did a better job there than Freightliner.
Thanks guys for the replys. On my coach the filter is in the left rear bay and is right in your face. Looks like I might be able to do this job without screwing something up. Don't know what filter you guys are using but I found a FARR 114880-003 at kustom-parts for $62 + shipping.
Utclmjmpr
Well-known member
Your requirements must be vastly different than the later model coaches, for my ISC, I searched and could not get below $110.00.>>>Dan
catblaster
Well-known member
While we're at it does everyone have that 6" flexible accordion hose from the filter to the outside pick-up grill?? I replaced it with 6" PVC , SDR35 and greatly reduced my suction pressure.
SargeW
Site Team
Several of the diesel head truck guys do that in an effort to boost air flow with adding more fuel either thru a downloader or power chip. It is effective in that situation, I would be interested to know if you notice a difference in performance or turbo response.
catblaster
Well-known member
Sarge...hard to notice since my waste gate was stuck partially open. Just fixed that and now I notice a big difference but can't blame it on the hose. The air cleaned indicator used to go almost to red before and not that I changed the hose it barely moves up. The waste gate has been frozen up since I bought it last year so I never realized the difference. I also opened up the intake box and made a plenum out of it for better airflow.
BernieD
Well-known member
utahclaimjumper said:
Dan
Have you tried RV Chassis Parts, the parts department of Spartan Chassis. If you are a Spartan Chassis Chapter of FMCA member you always get rally prices and free shipping for online orders. They usually have prices around the lowest in the country.
Utclmjmpr
Well-known member
Bernie, thank you, thats exactly were I bought one.>>>D
