leaky injectors 743

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SkidRoe

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I take it that you mean externally? Likely cracked or loose return lines. Had the same problem with the 773, all of the return line nuts had backed off. HTH
 

SkidRoe

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3538.8 hrs
Just thinking that while you had the injectors out to put new seal washers on, you may want to take them in to a diesel shop and have them tested.
That is not a lot of hours, but the machine is likely over 25 years old.
FWIW.
 
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qball 743

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Nov 27, 2013
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Just thinking that while you had the injectors out to put new seal washers on, you may want to take them in to a diesel shop and have them tested.
That is not a lot of hours, but the machine is likely over 25 years old.
FWIW.
Can I get those seal washers at napa, or do I have to get them from bobcat? Are they Brass washers, or copper ???
 

Tazza

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Can I get those seal washers at napa, or do I have to get them from bobcat? Are they Brass washers, or copper ???
Had the exact same issue with a 743 i bought. The copper washers under two injectors had grooves burnt in them from the exhaust gas escaping past the injector and washer.
Napa may have them, if not i diesel injection shop will have them.
When you go to replace them, ensure you give the injector hole a good scrape out of all carbon so it seats correctly. I have installed a rubber cap in the injector hole and scraped the hole with a screwdriver and i used an oring pick to scrape out the threads. I used compressed air to blow the loose crud out but be careful not tp push the cap into the cylinder.
 
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