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Case 450 dozer won't start

T

TCAT426

Member
Joined
Jan 17, 2017
Messages
24
Location
Palmer
I have a case 450 dozer that will not start, getting plenty of fuel through the injectors
What else would cause it not to run ?
 
Eric a1cnc

Eric a1cnc

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Sep 18, 2020
Messages
159
Location
New hampshire
Not enough info to really help you yet.
Does it do ANYTHING when turning over? Smoke, Try to start?
How old is the fuel?
What is the history on this no start, Did you just get it and it NEVER started or, it was running, sat and now won't start?

Help us help you
 
T

TCAT426

Member
Joined
Jan 17, 2017
Messages
24
Location
Palmer
New fuel, fuel filters and cleaned the injectors, set them to around 2500psi, getting smoke when cranking over.
I am getting plenty of fuel through the injectors, I hooked them up to the injection lines before I installed them, firing order is correct, not sure why it won't start
 
Eric a1cnc

Eric a1cnc

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Sep 18, 2020
Messages
159
Location
New hampshire
If it is turning over good and fast it might be worth bleeding the injectors. I usually find mine need to turn over good and fast to actually start.
Will it start or at least fire with a whiff of ether?
I also am finding if there is any fuel leakage and I turn off the fuel tank shutoff before it sits for a while, I end up bleeding the system to get it running again
 
T

TCAT426

Member
Joined
Jan 17, 2017
Messages
24
Location
Palmer
I tried the ether last night still didn't start, so I pulled the valve cover of to see if the push rods were bent or not moving freely. I tried restarting it and it started, not sure why but it did, while it was running noticed the top low pressure rail was leaking, so I need to replace the seals, The machine ran for about 5 minutes and then it quit, tried to restart and it would not. So next step is replace the top rail seals and try again
 
Eric a1cnc

Eric a1cnc

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Sep 18, 2020
Messages
159
Location
New hampshire
How much ether are you spraying? I find I have to give a 1/2 second squirt into the opening, wait a 1/2 second then turn it over for the ether to actually get the engine to fire. I also find that if the engine doesn't fire after spraying and I wait a couple seconds for the starter to cool, SOMETIMES there is still enough ether in the air filter to get it to fire. YMMV
 
T

TCAT426

Member
Joined
Jan 17, 2017
Messages
24
Location
Palmer
Eric a1cnc said:
Did you open the top of the injection pump to check it or just from the outside?
Click to expand...
Just from the outside, I pulled the injectors out of the head, and hooked them up to the injector pump and cranked it over so fuel is spraying out of the injectors. I took a video but not sure how to post it
 
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