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D318 Fuel pump question in an 8T grader
2 years 1 month ago #241071
by oldbeek
Cat 12 grader, 8T6995 running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 22, ser#438
D318 Fuel pump question in an 8T grader was created by oldbeek
Fuel getting into the crank case. Looked in my parts book. Only seal I see is at the front of crankshaft of the inj. pump. Seems to simple. Is that the seal that is leaking? How possible is it that the fuel transfer pump is dumping fuel into the crank case. That would be an easy fix also. My 80 yr old mind is getting fuzzy so help me out here guys. D318 engine on a friends 8t cat 12 grader.
Cat 12 grader, 8T6995 running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 22, ser#438
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2 years 1 month ago #241074
by Delta KJ
Replied by Delta KJ on topic D318 Fuel pump question in an 8T grader
A faulty seal between the injection pump and the fuel tower housing is a common reason fuel ends up in the crankcase. The seal is actually an o-ring and it isn't difficult to replace.
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2 years 1 month ago - 2 years 1 month ago #241079
by Rome K/G
Replied by Rome K/G on topic D318 Fuel pump question in an 8T grader
Takes an 8B4967 seal [o-ring], plus the gasket between the filter housing and pump housing.
Last edit: 2 years 1 month ago by Rome K/G.
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2 years 1 month ago - 2 years 1 month ago #241085
by oldbeek
Cat 12 grader, 8T6995 running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 22, ser#438
Replied by oldbeek on topic D318 Fuel pump question in an 8T grader
Thanks guys, With the fuel tower all filled with fuel, I am still confused how fuel can get into crank case. Got out my service manual. It shows the o-ring. Still don't see the shaft that drives the inj. pump.
Cat 12 grader, 8T6995 running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 22, ser#438
Last edit: 2 years 1 month ago by oldbeek.
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2 years 1 month ago - 2 years 1 month ago #241088
by Rome K/G
Replied by Rome K/G on topic D318 Fuel pump question in an 8T grader
The shaft drives from the timing gears and goes through the filter housing. That area through the filter housing is open to the front gear case, oil lubes the transfer pump drive gear and inj. pump drive shaft.
Last edit: 2 years 1 month ago by Rome K/G.
The following user(s) said Thank You: oldbeek
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2 years 1 month ago #241139
by oldbeek
Cat 12 grader, 8T6995 running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 22, ser#438
Replied by oldbeek on topic D318 Fuel pump question in an 8T grader
I was going to take on the job , but, how the H do you get a tool into those nuts on the block side of the pump? Anyone removed one of these, with some good hints of what they used.
Cat 12 grader, 8T6995 running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 22, ser#438
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2 years 1 month ago #241146
by Rome K/G
Replied by Rome K/G on topic D318 Fuel pump question in an 8T grader
3/8" drive long extensions and patience. Remove the governor first. Make sure everything is cleaned good before disassembly.
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2 years 1 month ago #241155
by oldbeek
Cat 12 grader, 8T6995 running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 22, ser#438
Replied by oldbeek on topic D318 Fuel pump question in an 8T grader
Looked like governor was worse yet. Book said remove governor after. I will go back and look at it again. Thanks Rome
Cat 12 grader, 8T6995 running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 22, ser#438
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2 years 1 month ago #241156
by Ray54
Replied by Ray54 on topic D318 Fuel pump question in an 8T grader
You need a young helper or a lifting device as it maybe less than a 100 pound but in a pore position to grab and lift. If I recall a swivel may be needed on the long extension.
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2 years 1 month ago #241162
by oldbeek
Cat 12 grader, 8T6995 running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 22, ser#438
Replied by oldbeek on topic D318 Fuel pump question in an 8T grader
I looked again. Impossible to remove the governor. The top and bottom nut no problem with a swivel socket and extension. Getting that center nut can be done but I wonder how I will get it started back on. Thinking of some kind of lifting device. Would be a lot easier to see and do if the exhaust manifold was off.
Cat 12 grader, 8T6995 running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 22, ser#438
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