KSB wiring on 89, any experts?

[M37]

I have a 89 5.9bt in a F250 and the wiring for the KSB has never been hooked up. It is the wax pellet style of KSB and what I have read it seems like it defaults into the advanced setting.
I would like to connect it properly, does anyone have a wiring diagram for the early engines (89) showing the normally open sensor and the wax pellet KSB?

Wonder what the fuel mileage will do after its corrected? (21 mpg now, 4x4 crew cab)

[bgilbert]

Just run a 'jumper' wire from the shutoff solenoid down to the ksb. It just needs 12 volts. This is how I did my crew cab.

[Tacoclaw]

Wouldn't it technically have to run through the temp switch on the intake, or does the wax style get away with this since it takes so long to activate anyways?

[M37]

It needs to be wired through the temp switch. The KSB uses coolant temp and is normally open until 160 deg. That is what I could find in the Cummins serv manual. Unfortunatly, the Cummins manual goes into detail on how to wire the starter (which has not changed since the 50's), but leaves out all the emissions controls (which seem to change every few years, as example by the wax pellet only used until the 90 model). They also reference a resistor in line with some KSB's.

I really was looking for the correct way of wiring it (as Cummins engineered). I didn't want to ass-u-me that it was a simple series circuit with the KSB grounded at the end, but that is proably how it is, just want to do it right.

[BobS]

It needs to be wired through the temp switch. The KSB uses coolant temp and is normally open until 160 deg. That is what I could find in the Cummins serv manual. Unfortunatly, the Cummins manual goes into detail on how to wire the starter (which has not changed since the 50's), but leaves out all the emissions controls (which seem to change every few years, as example by the wax pellet only used until the 90 model). They also reference a resistor in line with some KSB's.

I really was looking for the correct way of wiring it (as Cummins engineered). I didn't want to ass-u-me that it was a simple series circuit with the KSB grounded at the end, but that is proably how it is, just want to do it right.

The Dodge Cummins without intercooler and with intercooler use a similar circuit.

The non-intercooled circuit runs from the shut off solenoid terminal on the injection pump through the switch on the side of the engine and down to the KSB solenoid terminal. This switch should be normally open when cold and closes upon temperature rise.

The intercooled circuit runs from the shut off solenoid on the injection through the precision resistor mounted on the side of the head attached by the heat shield [attached to the intake cover bolt] over through the switch mounted on the intake manifold and onto the KSB solenoid terminal. This switch should be normally closed when cold and opens upon temperature rise.

You can direct wire the KSB to the solenoid in the non-intercooled versions as described above by Bill. The only downside is that in some cases you will have some whitish smoke hanging around a bit longer until the engine reaches operating temperature.

I just went through all of this education process when I added an intercooler to a non-intercooled engine and retained the original non-intercooled injection pump. In either case you RETAIN the original KSB circuit with the matching KSB switch for proper operation.

[M37]

Thanks, I went through a lot of post trying to get a good answer. Your answer should be saved for future generations........

[ahale2772]

bringing this back up...

Is there anyway to tell what KSB is on a pump? I suspect that my engine may have a KSB from an intercooled truck. My suspision is soly based on the fact that my ksb has been unplugged for about 3 years... with no ill effect.

lately she has been starting a bit hard, so literally 20 minutes ago I tested my truck, the KSB wiring is hot with key on, even if the intake air heater grid is active.

so im confused... will that 12v hot lead shut off at watertemps of 160deg?

With the line unplugged/plugged in I see no difference in case pressure throught my case pressure guage.

[PToombs]

Yes, it looks different than an IC KSB. I can't tell you off the top of my head, but if I saw a pic I could. Maybe search and look at pics of KSB's, I know there are plenty on here, just have to find them.

[dazedandconfused]

93

[Ed ke6bnl]

I just got me a 4bt motor 1987 with the ve injector pump. I am so confused on this KBS, finally got some pictures and mine does not have this unit on the side of the pump at all


any help on this issue is appreciated ED

[RCCUMMINS89]

No issue... ag applications didn't receive ksb solenoids.

[Ed ke6bnl]

No issue... ag applications didn't receive ksb solenoids.

Thanks for input, this came out of a bread truck I think 1987

any idea what the spring acuated part is right in the middle of the injection pump??

[bgilbert]

Manual shutdown lever.

[Ed ke6bnl]

Manual shutdown lever.

ok thanks a little like on my old ford tractor. my put that to use maybe cable operate it.

[PToombs]

Nice banjo bolt in the AFC top. Looks like somebody had a problem with it.