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P&H inline 6 cylinder

Fig

Registered
I'm picking this up this week. It's badged as a Fairbanks Morse. I really need to know the weight so I can decide what to take to fetch it. If anyone has any idea if be grateful.

I've no idea of condition. I bought it online auction based on pictures. I didn't see the pic of the tach stuck at 3,000 rpms so hopefully it wasn't a run away. If so it will just be a large, heavy conversation piece.
 

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dieselsteveo

Subscriber
Last Subscription Date
07/10/2019
Don’t know exact but it looks similar in size and design to other engines I’ve dealt with that are just under 3000lbs

Also, that turbo! Wow! It’s huge
 

Fig

Registered
Guess I'm not sticking it in the bed of my truck then. It's supposed to have alot of aluminum in it. I was hoping it was comparable to Cummins 6bt. I did find a post where the 3 cylinder version weighs 1300 lbs
 

K-Tron

Registered
The 687C was also a 4.5" bore, 5.5" stroke engine, but typically rated 150-190hp @ 1800rpm. The 687 ranged from 1900 to 3000lbs depending on the configuration. The marine hardware added a lot of weight. I would safely say that your engine is up near 3000lbs with that skid, air cleaner, turbocharger and all. I just happened to notice that your engine has provision for dual starters. That is really unusual on an engine of that size. It appears to have lived a nice sheltered life indoors, hopefully it was well cared for. P&H put the dry weight of the engine on the aluminum valve cover tag. Perhaps that information is still there. Im pretty sure every P&H had an aluminum crankcase. It is said that these engines had lots of issues with cavitation if the proper coolants were not used. In particular the aluminum blocks corroding out around the wet liner o-rings, allowing coolant to dump into the oil.

Chris
 

Fig

Registered
We'll I got it home. I'll have to see what kind of mechanical condition it's in later. I have to do something else right now.
 

Fig

Registered
I have some pics of tags today. If anyone has any information on this engine I'd appreciate it. Particularly looking for fuel system, timing, it has some oddball cooling system (marine maybe), and it appears to have a 24 volt starter which I have no experience with. None of the starting system is wired and I have no idea where to start with that. Thanks.
 

ronm

Subscriber
Last Subscription Date
07/10/2019
Give the RoosaMaster number off the pump to a pump shop, they should be able to tell you the engine model. Maybe also timing specs.
The 1800 RPM is like a genset engine, maybe FB used the P&H engine for one of their electrical sets.
 

cornbinder89

Registered
Last picture is a measured shot ether system to aid in cold starting. 24 volt cranking is wired just like 12 volt, the only time there is a difference is when the charging system is 12 volt and 24 is only used for cranking. In most cases this is only used on on road vehicles.
 

enginenut2

Registered
Age
78
I found the P&H engines listed in my "Diesel Engine Catalog" books as both Harnischfeger and Fairbanks-Morse in the volumes 19 (1954),20 (1955),22 (1958), and 24 (1959).The 6 cyl F-M was called Model 49B4 1/2 while the P&H was called Model 687c18. The earlier ones pictured used individual injection pumps actuated by the valve camshaft where the later used Roosa Master. Unique cylinder/head/piston assembly as the individual head was screwed on the cylinder and the piston was allowed to rotate in the cylinder-having no piston pin but a mushroom shaped connecting rod end that nested in a matching cavity in the piston. The F-M ads offered twin 4 and 6 cyl sets. the 6cyl naturally aspirated was rated 825 ft lbs @1300 RPM but for some reason none of the turbocharged units listed a max torque rating.

PS: The F-M ad mentioned approval and rating for fire pump service. That could explain the unusual cooling setup and possibly the letter F at the end of model number.
 

miltruck

Registered
Look like solenoids for the starter circuit. May have used two due to the 24 volt system and the high inrush current load.
I would just use a new single 24 volt solenoid wired to the starter terminal with a simple push to start button. If the existing coils/solenoids are 24 volt one of them may work but might not handle the load.
 

Oil Power

Registered
[Give the RoosaMaster number off the pump to a pump shop, they should be able to tell you the engine model. Maybe also timing specs.
The 1800 RPM is like a genset engine, maybe FB used the P&H engine for one of their electrical sets.]

I have looked up the number from the plate on this pump, in my old Roosa Master microfiche. The test plan below is the closest listed. It is for engine model 687C-18. All it tells us about timing is that it is timed to the line on the OD of the cam ring. This will be visible when the small plate on the side of the pump as shown in the photo is removed. When the engine is turned a timing mark etched on the weight retainer in the pump will show up. this mark should be in line with the groove in the cam ring when the engine is in the timing position. Look for an injection mark on the flywheel.
Hugh
 

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