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3 - 53 rack info?

Tenwheeler

Senior Member
Joined
Dec 15, 2016
Messages
957
Location
Georgia
The old injectors were set at about 1.540, using a dial caliper. I was reluctant to make that big of a change but found other similar settings on line to Simmons 1.480 and went with that. I even had that gauge. Installed an electric fuel pump before the primary filter and let it run while I put all the tools away. Took that pump out of the system. and cranked it at about 1/2 throttle. It came to life shortly and I kept it down at a lower speed " no tach " and checked all the fuel lines for leaks and worked it on up.
Brought it back down and it shuts off with the throttle as it is pulled back. Push the throttle back up and it fired right up.
 

Tenwheeler

Senior Member
Joined
Dec 15, 2016
Messages
957
Location
Georgia
It runs great a the top 85% of throttle but if left running at lower speeds it starts to act like it is running out of fuel. If down around 750? RPM it will shut down. No one can tell me if this is a new thing or prexhisting condition. Ran it at higher speeds and shut it off. Hours later it was hard to start. Will go back with clear fuel lines and gauges.
Did not take the top off the governor. The gasket would have broken and I did not have thin paper. Backed the buffer screw out. Tied the shut down full open. Throttle did not seem to make much difference 1/2 maybe. Ran the rack. Did not find an idle screw like I expected. It is probably the screw on the back of that long housing but I did not want to be a knob dicker.
Any good advise and or copies for this unit out of the shop manual appreciated.
 

Simon C

Senior Member
Joined
Jul 1, 2015
Messages
2,990
Location
Rocky Mountain House , AB., Canada
Occupation
Heavy Equipment Mechanic
It runs great a the top 85% of throttle but if left running at lower speeds it starts to act like it is running out of fuel. If down around 750? RPM it will shut down. No one can tell me if this is a new thing or prexhisting condition. Ran it at higher speeds and shut it off. Hours later it was hard to start. Will go back with clear fuel lines and gauges.
Did not take the top off the governor. The gasket would have broken and I did not have thin paper. Backed the buffer screw out. Tied the shut down full open. Throttle did not seem to make much difference 1/2 maybe. Ran the rack. Did not find an idle screw like I expected. It is probably the screw on the back of that long housing but I did not want to be a knob dicker.
Any good advise and or copies for this unit out of the shop manual appreciated.
The right side of your picture is the governor adjustment for high idle internally with shims. The screw sticking out is the buffer screw. It needs to be backed out before adjusting the fuel racks, then with the engine running you turn it in very gently until it goes up about 10-15 rpm, just enough to take the hunting out. go up a hair too much and it will run away! The engine should idle okay with it set properly unless you have a fuel supply issue of some kind. 1.480 is the correct setting for the injectors with the valves down.
Not sure what else to say other than watching the injectors back out of full fuel when it is starting and watching that all the injectors are even in every position.
Simon C
 

John C.

Senior Member
Joined
Jun 11, 2007
Messages
13,128
Location
Northwest
Occupation
Machinery & Equipment Appraiser
It's be a long time ago but I was working on one of those but it sounds like the injectors are not adjusted against the governor all the way.
 

Simon C

Senior Member
Joined
Jul 1, 2015
Messages
2,990
Location
Rocky Mountain House , AB., Canada
Occupation
Heavy Equipment Mechanic
When the injectors are just sitting there, are they all inwards the same for start up. Have not done one for years but, need to have snap on the little U that the fuel rack arm goes into.
Put your vice grips really solidly on the clevis where the governor linkage hooks up to the fuel rack with a pin. That is your protection device to be able to pull the fuel rack out of fuel when adjusting the buffer screw and testing for performance. By passing the governor with the fuel rack disconnected from the governor can be done, but those vicegrips best not fall off or it is all over. Have done this test before to prove if the engine runs okay without a governor hooked up. If it won't run okay without the governor hooked up, you can rest assured it won't run correctly with it connected. Don't be doing this test unless you are fully prepared and not been drinking.
Simon C
 

terex herder

Senior Member
Joined
Nov 10, 2017
Messages
2,307
Location
Kansas
That is the newest looking Cleveland I've ever seen. All the ones around here look about a half generation newer than Fred's Flintmobile. That 3-53 would be a big improvement over the dual fuel 'binder engine I've worked on (notice I didn't say fixed). But I don't think anything can dig a ditch more efficiently than a Cleveland.
 
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