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09-11-2022, 10:26 AM
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#1
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Junior Member
Join Date: Apr 2015
Posts: 14
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Fuel Primer Button
Can anyone explain where the fuel pump primer button is on a Cummins ISC 350.
My engine stopped due to low oil (just had it serviced 2 days ago).
I added 1 1/2 gallons but because it stopped running (vs shutting it off) air got in the fuel line after the pump.
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09-11-2022, 10:38 AM
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#2
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,500
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What year ISC ?
Normal prime cycle on Cummins engines ; is ; 12 volt primer pump runs for 30 secs at ignition key on , repeating key off/on will restart the primer pump cycle .
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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09-11-2022, 10:50 AM
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#3
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Junior Member
Join Date: Apr 2015
Posts: 14
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I thought there was also a manual rubber primer button?
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09-11-2022, 10:54 AM
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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 Skip426
What year ISC ?
Normal prime cycle on Cummins engines ; is ; 12 volt primer pump runs for 30 secs at ignition key on , repeating key off/on will restart the primer pump cycle .
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Should apply.
Easy to verify: have someone turn the key to first position while you listen by passengers side behind rear tire. Electric pump should run 20-30 seconds and shut off.
If pump is running at high RPM, it is AIR. Lower RPM is diesel.
__________________
Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
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09-11-2022, 11:33 AM
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#5
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Junior Member
Join Date: Apr 2015
Posts: 14
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Disconnected a fuel injector line and fuel is being delivered.. still won’t start. Might be a fuse to the ECM?
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09-11-2022, 01:34 PM
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#6
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Senior Member
Join Date: Oct 2021
Posts: 410
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I’m curious where the gallon and a half of oil went? Was it not filled during the ‘service’?
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Jimmy……
2001 Alpine 36 mdds
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09-11-2022, 01:52 PM
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#7
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,500
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Quote:
Originally Posted by 1Proudvet
Disconnected a fuel injector line and fuel is being delivered.. still won’t start. Might be a fuse to the ECM?
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Still would like to know the year of your ISC .
Two different injection systems possible on ISC . CAPS and HPCR .
Removing an injector line on HPCR can be hazardous to your health . 33,000 PSI.
But many years of ISB and ISC had 4 or 5 battery fuses ( non ignition feeds) to the Cummins ECM ; some years inline fuse holders , some years chassis would have a rear fuse panel . No idea what Alpine used , but Cummins specified the circuits and number of fuses .
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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09-11-2022, 01:59 PM
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#8
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,500
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Quote:
Originally Posted by 1Proudvet
I thought there was also a manual rubber primer button?
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That was on a 12 valve , 8.3 L Cummins engine with the mechanical P-7100 injector pump , the predecessor of the 24 valve ISC
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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