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10-27-2020, 06:10 AM
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#1
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Junior Member
Join Date: Oct 2020
Posts: 1
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Changing Oil
want to change the oil filters, i have oil wrench, anything else i need to know, 400 cummins engine. 
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10-27-2020, 06:37 AM
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#2
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Senior Member
Join Date: Apr 2017
Posts: 387
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You'll need a large capacity oil catch, my 425 ISL will drop 6.5 gallons
Then there's the oil filter, when you pull that one down it has 3/4 of a gallon full to the top and weighs a few pounds, have at least a 16" tall bucket under it to drop in.
For the oil filter wrench I used a strap style with a 1/2" ratchet and 6" extension to get it loose
Easy job takes about an hour
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2008 Mandalay 43A FL XC ISL 425 '16 GC, Blue Ox 10K Avail Apollo aux braking and TSD Member
1996 Winnebago Vectra 230 DP 2000 Fleetwood Tioga Montara
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10-27-2020, 12:51 PM
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#3
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Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: Apr 2012
Location: Southern NM
Posts: 3,380
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As far as the oil filter, with an oil pan underneath it, punch a hole in the bottom of the filter with a large screw driver. Let it drain, no mess  .
Don’t forget to prefill your filters..
Some folks install a Fumoto drain valve , makes draining oil a bit easier when you don’t have a large drain pan.
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2018 Allegro Bus 37AP
2014 Phaeton 40 QBH (sold)
2022 Jeep JLURD
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10-27-2020, 01:06 PM
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#4
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Senior Member
Join Date: Oct 2014
Posts: 7,882
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Quote:
Originally Posted by garykk
As far as the oil filter, with an oil pan underneath it, punch a hole in the bottom of the filter with a large screw driver. Let it drain, no mess .
Don’t forget to prefill your filters..
Some folks install a Fumoto drain valve , makes draining oil a bit easier when you don’t have a large drain pan. |
Two observations:
1. Slightly loosen the oil filter BEFORE punching a hole in it. Would hate to see you not be able to get the filter off and have a hole in the old one!
2. Both sides of the "prefill oil filter/don't prefill oil filter" have merit. Have discussed "how clean is oil out of the container" with petroleum engineers. THEIR RECOMMENDATION is "oil is clean, but not guaranteed to always have zero particulates/contaminants.
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Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
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10-27-2020, 01:21 PM
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#5
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Aug 2002
Location: Clovis, CA, USA
Posts: 13,149
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wolfe10 said:
"1. Slightly loosen the oil filter BEFORE punching a hole in it. Would hate to see you not be able to get the filter off and have a hole in the old one!"
Amen to that.
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2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
2000 LEXUS RX300 FWD 22MPG 4020 LBS
Criticism is easier than Craftsmanship
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10-27-2020, 01:25 PM
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#6
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Senior Member
Join Date: Oct 2020
Posts: 661
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I would guess there's a Youtube video that would walk you through it. I'd look at the comments to see if they missed a step, or wrong order. For example on my engine they sometimes change the oil filter after plugging the crank case, which is bad because the oil filter is up top.
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10-27-2020, 01:35 PM
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#7
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,395
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Shop towels. Lots and lots of shop towels.
It seems that every time I change oil in anything from the lawn mower to the MH, I manage to have a spill of some sort. 
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Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand! 
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10-27-2020, 02:28 PM
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#8
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Senior Member
Join Date: Oct 2020
Posts: 661
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Quote:
Originally Posted by Unplanned
Shop towels. Lots and lots of shop towels.
It seems that every time I change oil in anything from the lawn mower to the MH, I manage to have a spill of some sort. |
I would say vinyl gloves, if you can find any with people buying them up for Covid.
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10-27-2020, 06:51 PM
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#9
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Senior Member
Join Date: Nov 2013
Posts: 5,778
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Quote:
Originally Posted by wolfe10
Two observations:
1. Slightly loosen the oil filter BEFORE punching a hole in it. Would hate to see you not be able to get the filter off and have a hole in the old one!
2. Both sides of the "prefill oil filter/don't prefill oil filter" have merit. Have discussed "how clean is oil out of the container" with petroleum engineers. THEIR RECOMMENDATION is "oil is clean, but not guaranteed to always have zero particulates/contaminants.
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Cummins service manual specifically states to pre-fill the filter with new oil. There is also a warning for not doing this.
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2015 Tiffin Phaeton 40QBH
2018 Chevrolet Colorado Toad
Roadmaster Tow Setup
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10-27-2020, 07:10 PM
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#10
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Senior Member
Join Date: Jan 2018
Location: Sacramento CA.
Posts: 536
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Rag tied around your arm to prevent oily arm Pitt.
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2005 Itasca meridian
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10-27-2020, 07:21 PM
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#11
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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My ISX takes 14 gallons. Haven't attempted it yet!
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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10-28-2020, 07:07 AM
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#12
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Senior Member
Tiffin Owners Club Texas Boomers Club
Join Date: Feb 2018
Location: North Texas
Posts: 2,121
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Why not use an oil change pump? I use that on most engines. Allows you to get the oil out in a clean orderly manner without getting underneath - since you can shut off the pump if you need to change the old oil container. Optionally, you can then drain the pan with the drain plug, but I've never gotten much additional oil out via that option.
Filter is still a mess to change.
My pump is from Northern Tool. Has worked well for several years now.
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2014 Tiffin Allegro Bus 37AP
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10-28-2020, 07:15 AM
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#13
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Senior Member
Join Date: Mar 2018
Posts: 338
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Must Have
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10-28-2020, 07:34 AM
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#14
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Senior Member
Join Date: Nov 2005
Posts: 7,400
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Thoughts: 1- filter can be very tight--I fashioned a wrench out of cargo strap--wont crush the filter; 2- like fuel filter, guess you can try to pour new oil on outside holes of filter--really don't see an issue with pre-filling, always done it, but do put the packing wrapper over open end of new filter until I get it in place to spin on; 3-hard to see "pumping" 7 gals out of dip stick tube, nor does it allow oil pan to drain/flush; 5-what about changing your fuel filter[s]????
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Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
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