450C that runs for a little bit and loses power then dies?

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JerryDS
MC crawler
MC crawler
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Joined: Sat May 05, 2007 11:18 am
Location: West Tennessee

Post by JerryDS » Sun Jan 20, 2008 11:45 am

As usual - the help I need is here!!! Thanks

joecrawler47
MC crawler
MC crawler
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Joined: Mon Sep 04, 2017 6:37 pm

Re: 450C that runs for a little bit and loses power then dies?

Post by joecrawler47 » Sun Oct 28, 2018 8:57 pm

How do you remove the filter screen going into the injector pump? I'm having the same problem with my 450C crawler loader. Engine starts fine, runs for a few minutes, then dies. I have removed and cleaned the fuel tank, replaced the screen filter in the base of the tank, cleaned the fuel tank vent line, and replaced the fuel filter. I'm stumped.
Thanks in advance for any help.

Jim B
350 crawler
350 crawler
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Joined: Sun Nov 05, 2017 11:36 am
Location: western Maine

Re: 450C that runs for a little bit and loses power then dies?

Post by Jim B » Mon Oct 29, 2018 4:55 am

Have you checked to see that the return line to the tank is clear? That includes removing the check valve fitting from the injection pump and seeing if it has foreign material looking like mouse turds in it. You can remove the timing window cover and check for debris there as well. If you find that condition, it is the Pellethane ring in the pump breaking up and you are looking at a pump rebuild.


The screen in the pump inlet is under the inlet fitting.

joecrawler47
MC crawler
MC crawler
Posts: 6
Joined: Mon Sep 04, 2017 6:37 pm

Re: 450C that runs for a little bit and loses power then dies?

Post by joecrawler47 » Wed Oct 31, 2018 6:20 pm

I have not checked the return line. Will do that next.Sorry, I don't know much about injection pumps. Is the check valve on the pump return line? Thanks for the help.

Jim B
350 crawler
350 crawler
Posts: 2080
Joined: Sun Nov 05, 2017 11:36 am
Location: western Maine

Re: 450C that runs for a little bit and loses power then dies?

Post by Jim B » Wed Oct 31, 2018 8:02 pm

The check valve should be the fitting where the return line connects to the injection pump.

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