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07-08-2011, 08:40 AM
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#1
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Member
Join Date: Jan 2008
Location: kingston, oklahoma
Posts: 34
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Is it best to fill the filters with diesel before installing? 
2005 DSDP 3815 cummings 370
Thanks
Keith
__________________
DSDP 3815--spartan chassis--370 cummings eng--2008 tahoe toad .. M & G break system--roadmaster sterlng tow bar-- 
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07-08-2011, 09:46 AM
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#2
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Community Administrator
Newmar Owners Club
Join Date: Jan 2010
Posts: 4,593
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When I watched the tech do it at Speedco they filled the filters and I believe it's recommended.
__________________
2007 Newmar DSDP 4023
Discovery is seeing what everyone else has seen and thinking what no one else has thought.
If you want to see what man made go East; if you want to see what God made go West.
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07-08-2011, 10:05 AM
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#3
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Community Administrator
Newmar Owners Club
Join Date: May 2000
Location: Newark, DE
Posts: 13,893
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Cummins says do not fill ISL fuel filters, but most shops do as it's faster than the priming process.
Cummins states the risk of contaminated fuel damaging the pump is too great.
__________________
Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, '07 DSDP, '11 Virtual RV
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07-08-2011, 12:24 PM
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#4
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Senior Member
Join Date: May 2011
Location: Vancouver, WA
Posts: 4,278
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On our ISC the instructions say NOT to prefill. The priming procedure works great and no chance of getting unfiltered fuel into the injectors like can happen with prefilling.
__________________
2002 Newmar Dutch Star 4090 ISC 350/1050 with Banks Kit, now 435/1200
Charter Good Sam Lifetime Member, FMCA f47302s
RV'ing since 1957, NRA Benefactor Life Member
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07-08-2011, 12:25 PM
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#5
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Senior Member
Join Date: May 2011
Location: Vancouver, WA
Posts: 4,278
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Quote:
Originally Posted by Route 66
Cummins says do not fill ISL fuel filters, but most shops do as it's faster than the priming process.
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So, turning the ignition on and waiting 30 seconds is too long? That's all mine takes.
__________________
2002 Newmar Dutch Star 4090 ISC 350/1050 with Banks Kit, now 435/1200
Charter Good Sam Lifetime Member, FMCA f47302s
RV'ing since 1957, NRA Benefactor Life Member
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07-08-2011, 12:26 PM
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#6
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Senior Member
Join Date: May 2011
Location: Vancouver, WA
Posts: 4,278
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Quote:
Originally Posted by RJay
I believe it's recommended.
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Better go read your manuals then.
__________________
2002 Newmar Dutch Star 4090 ISC 350/1050 with Banks Kit, now 435/1200
Charter Good Sam Lifetime Member, FMCA f47302s
RV'ing since 1957, NRA Benefactor Life Member
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07-08-2011, 12:28 PM
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#7
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Community Administrator
Newmar Owners Club
Join Date: May 2000
Location: Newark, DE
Posts: 13,893
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Some, like mine took several cycles.
Quote:
Originally Posted by Mr_D
So, turning the ignition on and waiting 30 seconds is too long? That's all mine takes.
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__________________
Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, '07 DSDP, '11 Virtual RV
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07-08-2011, 12:29 PM
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#8
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Community Administrator
Newmar Owners Club
Join Date: Jan 2010
Posts: 4,593
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Quote:
Originally Posted by Mr_D
Better go read your manuals then.
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Yup, Your right! My mistake. 
__________________
2007 Newmar DSDP 4023
Discovery is seeing what everyone else has seen and thinking what no one else has thought.
If you want to see what man made go East; if you want to see what God made go West.
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07-08-2011, 12:37 PM
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#9
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Community Administrator
Newmar Owners Club
Join Date: May 2000
Location: Newark, DE
Posts: 13,893
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Just for the sake of conversation, I believe Cummins recommends filling ISM filters.
If you insist on filling your filter, fill through the little holes, as the large center hole is the discharge.
__________________
Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, '07 DSDP, '11 Virtual RV
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07-08-2011, 12:45 PM
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#10
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Member
Join Date: Jan 2008
Location: kingston, oklahoma
Posts: 34
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Thanks guiys for the info>>>>
Keith
__________________
DSDP 3815--spartan chassis--370 cummings eng--2008 tahoe toad .. M & G break system--roadmaster sterlng tow bar--
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07-08-2011, 04:27 PM
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#11
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Member
Join Date: Jan 2008
Location: kingston, oklahoma
Posts: 34
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Thanks again guys. I just talked with a cummins rep. He said fill the primary and put the secondary on dry. That is for the 370 ISL.
__________________
DSDP 3815--spartan chassis--370 cummings eng--2008 tahoe toad .. M & G break system--roadmaster sterlng tow bar--
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07-08-2011, 04:32 PM
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#12
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Senior Member
Join Date: May 2011
Location: Vancouver, WA
Posts: 4,278
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Quote:
Originally Posted by Route 66
Just for the sake of conversation, I believe Cummins recommends filling ISM filters.
If you insist on filling your filter, fill through the little holes, as the large center hole is the discharge.
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The center hole is a normal pipe thread, get a short nipple and thread it into the hole. That will keep unfiltered diesel out of the filter.
__________________
2002 Newmar Dutch Star 4090 ISC 350/1050 with Banks Kit, now 435/1200
Charter Good Sam Lifetime Member, FMCA f47302s
RV'ing since 1957, NRA Benefactor Life Member
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