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Post by yachtsmanwilly on Apr 10, 2022 7:32:01 GMT -5
Anyone, feel free to jump in on this ok? The CHEYENNE is a 1966 Bushey Built 85 foot tugboat with a 2000 HP 10 cyl. Fairbanks-Morse 38 D 8-1/2 main engine. The question here is about fuel filtration. There is a compound pedestal mount fuel filtration system with TWO primary 30Mc filters and TWO secondary 5Mc filters. These are DUPLEX units. So far I havent gotten into these but will soon. Both the primaries and secondary's are set to "both", kind of defeating the purpose of the compound system. The primary elements are 6" dia x 2+ feet long; good sized right? Theres 2-3 fuel filter PRESSURE gages on the pedestal, but no VACUUM gages. It would be nice to be able to determine restriction values before it becomes critical. I dont think run of the mill RACORS will supply the demand; even the 1000 models. Whats the solution? So now, a few other boats in the "fleet" run at 850 rpm. This one tops out at about 765. I really dont want to play with the governor until the filters are changed. Right? The main produced 850 turns last year coming down from Detroilet. That is leading me to believe its a filter issue. It has a Woodward hydraulic governor. I hope SCROD or BANNED can shed some light on this. Thanks! Attachment Deleted
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Post by badhattitude on Apr 10, 2022 12:36:51 GMT -5
Whats the gph of the circuit?
I've set up dual 1000 racors to meet the gph requirements of larger detroits where 2 run in parallel to increase the flow. It's all in the numbers.
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Post by yachtsmanwilly on Apr 10, 2022 19:10:38 GMT -5
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Post by skycheney on Apr 10, 2022 20:02:52 GMT -5
I see the problem. Two of the soup cans are tilted in the wrong direction.
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Post by Avenger on Apr 11, 2022 10:14:40 GMT -5
Just a guess, but if the filters are set up so you can run one, the other, or both it would make sense that they are capable of supplying the engine individually.
Racor and Dahl make much larger units, or as Scott said, ganged units to meet flow demand. Just be careful of the ratings. Racor can be,... ummm,.. optimistic?... about their flow ratings. Dahl used to give you one for comparison, and then a much lower real rating at which the filter could actually work effectively.
The governor is a Woodward UG-8L "L" meaning lever control. There's a high-speed stop screw sticking out the side of the face plate of the governor. If you pull off the shiny cover that the throttle lever sticks though it will be very obvious how it works.
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Post by yachtsmanwilly on Apr 11, 2022 12:26:55 GMT -5
Not too sure, but we think the Wizz kid adjusted it! Boat runs about 9 mph light now and was running at about 13 before the "fine tune"...Adjustment under upper or lower cover?? Attachment Deleted
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Post by Avenger on Apr 11, 2022 14:21:25 GMT -5
The green thing is the governor, so upper. Actually the adjustment sticks out the side, but you may need to pull the cover off the front to access the jam nut. BTW, the governor oil needs to be changed occasionally. Don't be like EVERY F-Kin' ship I've ever gotten a governor off of where they change the oil after the failure. Sparking clean oil and the inside of the governor is just sludged.
That Woodward green is a lovely color isn't it? We had a hell of a time painting the rebuilt ones. Actually had to get them color matched and use a spray gun. Then Krylon started making a spray bomb that was "close enough." Saves us hours.
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Post by Avenger on Apr 11, 2022 14:41:33 GMT -5
Well, aren't you the lucky one. I just happened to have one on my workbench. That stop on the shaft is only held on by the cover. It fits the spline on the throttle shaft so can be shifted any number of teeth. Also, there may be more than one on your governor. It's possible the stop was moved, or the screw was adjusted. Needless to say, make sure the bridge controls are commanding the stop plate all the way against the screw before you start adjusting stuff.
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Post by yachtsmanwilly on Apr 11, 2022 16:02:35 GMT -5
Verry EEnterestink ! So without pulling this one apart yet (I recommended not making any adjustments without a warmed up engine) there appears to be two adjusters; one on the side and one on the top. They both have square head screws with a hex jam nut. Oil appears pretty clean. Theres also a "bar" that seems to be like a counterweight (it swings to the straight down position when released). Pardon the fat fingers, but they are holding up all the linkage for the photo op LOL. Just above the governor is a ledge where the engine room control/bridge disconnect is situated.. Throttle and clutch can be control from downstairs. Is that where commanding the stop plate comes into play? The yard that we are working for gave us a pair of Racor 1000s with what appears to be the same size AN 12(?) supply hose. I figured 30Mc elements in those and an Individual on engine 500 with a 4-5 Mc element? Attachment DeletedAttachment DeletedAttachment Deleted
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Post by yachtsmanwilly on Apr 11, 2022 16:05:10 GMT -5
I see the problem. Two of the soup cans are tilted in the wrong direction. Engineer has to make lunch too... My MMD rates me as an OS, WIPER, and a STEWARD... Todays lunch is luke warm Spaghetti O's... right!
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