Jones1
Birmingham, Al
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Joined: 09/12/2009
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Hello All
I replaced the air filter on my Cat 3126 and the filter minder does not read anything. It is at the very bottom of the minder.
Is this normal after a filter change? This is the first time I have replaced the filter since I have owned the unit. Checked all tje connections and all seem to be connected properly
Thanks for any replys.
Roy Jones
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wolfe10
Texas
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Joined: 10/08/2000
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Yes, some filters have so little restriction that they do not register on the air filter minder.
But the filter minder is easy to test. Remove the tube from the intake end and suck on it. It should instantly peg full vacuum reading and hold there until you push the button on the bottom to reset it.
And once reset, you will have to drive hard (higher RPM WOT) to pull maximum vacuum reading which the filter will "store" as maximum vacuum achieved.
Brett Wolfe
1993 Foretravel 36' U-240
Cat 3116, Allison 3060
FMCA Forum: www.community.fmca.com/index
Caterpillar RV Engine Owner's Club: www.catrvclub.org
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jauguston
Bellingham, WA
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You didn't by chance install a K-N brand filter?
Jim
2005 Coachman Sportscoach Elite 402 40'
350hp Cat C-7 w/MP-8
7500w Onan quiet diesel generator
6-Kyocera 130w solar panels SB3024i MPPT controller
Pressure Pro TPMS
1987 Suzuki Samurai tintop Toad w/VW 1.6 turbo diesel power
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Valkyriebush
Yuma/Port Townsend
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Make sure the clamps and the ducting is sealed good and tight
Command Master Chief (AW) USN, (ret)
2003 Fleetwood Excursion 330 Turbo Cat 39D
2000 Jeep GC
2005 Big Ruckus (Rides Behind Jeep)
2003 VTX 1800
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badboy368
OHIO
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jauguston wrote:You didn't by chance install a K-N brand filter?
Jim
why did you ask about the K & N filter? i put one on mine and didnt really notice any difference. was this something i shoulnt have done? my filter minder shows the exact same readings.
40' pusher,350 turbo cat, pullin a 37' trailer haulin a drag car. oh yea baby
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down home
south
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Our C7 is the successor to your engine or virtually the same.
The filter minder, was indicating no resistence. Found out why. The exit rubber fitting or whatever was broken on the top side and all that dirty air near the road was getting in. Changed to new and the filter minder kept pegging to just below red. They installed an off brand. Next stop that has a Cat filter and it goes on.
With a good Cat filter though the filter minder was up in the yellow all the time. Not sure one would fit but a larger filter would be nice.
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gswcgi
Wandering
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I have a CAT 3126E and I ignore the cheapo filter minder that Monaco used. I change the air filter every year regardless of the mileage and since I buy the filter at Napa Truck parts store for $80 I consider it cheap insurance since I don't off road with my rig, I'm a happy camper!
'03 Safari, DP, 36" Nissan 4X4 toad
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wolfe10
Texas
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Couple of comments.
The air filter minder reads TOTAL restriction from side of coach to the air filter minder tap location not just the air filter.
So if the inlet on the side of the coach is too small, the duct from side of coach to air filter too small, corrugated and too long, air filter too small, ALL contribute to a high air filter minder reading.
It is a good idea to record the air filter minder reading after changing the filter AFTER resetting the air filter minder to zero and then after the first high RPM WOT run. If high, look to improve one or more of the above.
Also, I would suggest that changing the filter annually is overkill unless you drive a lot of miles in high dust conditions. A filter is actually better at removing dirt after it is "broken in" when the larger pores are filled with dirt.
I agree with the 3 year rule due to the breakdown of the filter media.
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fcooper
Richmond Hill, Georgia
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Regarding no reading on the filter minder:
Be sure the vacuum hose is good all the way from the filter minder to the engine connection.
If the vacuum hose has failed, the screen inside the engine fitting can clog with dust. It can be removed and soaked in solvent to clean.
Fred
Fred & Vicki
Richmond Hill, Ga
2000 Holiday Rambler Endeavor/Freightliner/330 Cat
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Tire Sentry monitoring system
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Jones1
Birmingham, Al
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Thanks to all for the information. I checked all the connections when I installed and did as Burt said to check the filterminder. It worked as it should. I have never run the engine WOT. as your travels are all in the South. I just did not know if it would/should have a reading on a new nama brand filter.
Thanks Again for the information
Roy Jones
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