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Related Medium and Heavy Trucks Questions
The engine fan will not come on automatically when water
The engine fan will not come on automatically when water temp gets high under a load. The fan works when I turn on manual switch and the fan works with the high pressure side of A/C. this is a C-16 en… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
A/C on my 1998 KW W900L cat 3406E is working great but i am
A/C on my 1998 KW W900L cat 3406E is working great but i am having a problem with the engine fan turning on automatically when the a/c is on i have to turn it on manually. I replaced switch-fan overri… read more
Cat Man
Cat Man
Cat Engine Expert
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I have 1999 peterbilt engine fan wont come on automaticly.
Hi i have 1999 peterbilt engine fan wont come on automaticly … read more
Cat Man
Cat Man
Cat Engine Expert
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Ecm coolant sensor is reading 20 degrees higher than dash
ecm coolant sensor is reading 20 degrees higher than dash gauge. when dash gauge reaches 200 the hot water light comes on then few seconds later stop engine light. check with inferred temp and dash ga… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
I have a 3406E cat serial number 5EK 550 HP I cannot get
I have a 3406E cat serial number 5EK 550 HP I cannot get more than 18 to 20 PSI of turbo boost before this started I would getting 32 PSI it started dropping gradually over a few weeks period I have c… read more
Cat Man
Cat Man
Cat Engine Expert
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10,237 satisfied customers
Working on a 3406e 5ek in 1996 379 pete, eng fan running all
working on a 3406e 5ek in 1996 379 pete, eng fan running all the time, check wiring and fuses and relays all seem to b ok, on the plug that goes on the manual o/r switch in cab all the wires are hot i… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
Have a 3406e in my 2000 model 379 and my engine fan comes on
Have a 3406e in my 2000 model 379 and my engine fan comes on and off at highway speed. It's not running hot. I've replaced the fan sensor on fire wall and a/c sensor on side of the radiator. The fan a… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
I have a 3406e in a 99 westernstar, im trying to locate the
I have a 3406e in a 99 westernstar, im trying to locate the temp sensor that turns the fan switch on, I replaced the one in the thermostat housing and the fan still will only come on if you manually d… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
The fan doesnt come on with jakes or when engine temp is hot
the fan doesnt come on with jakes or when engine temp is hot in our 1998 peterbilt 378 with a 3406e … read more
Cat Man
Cat Man
Cat Engine Expert
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10,237 satisfied customers
I have a 3406e cat and why doesn't the AC gh pressure switch
I have a 3406e cat and why doesn't the AC high pressure switch turn on the engine fan ? … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
have a 2000 fld120 vin# ***** engine fan dont come on with
have a 2000 fld120 vin# ***** engine fan dont come on with engine temp comes on with ac , jake brakes can unplug temp sensor and will stay on have changed temp sensor reparied some bad wiring on harne… read more
Cat Man
Cat Man
Cat Engine Expert
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10,237 satisfied customers
Cat Man, I have a KCB25071 that the engine fan stays on all
Cat Man, I have a KCB25071 that the engine fan stays on all the time. What all inputs will cause the fan to come on? The a/c pressure is off, the manual on/off works, fan output is off. circuit works … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
put bxs engine converted t9o 6nz in 97 pete everything seems
put bxs engine converted t9o 6nz in 97 pete everything seems to be fine except the fan let me explain with the engine harness disconnected I have power on both sides of the ac system also both sides o… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
Hi can you help to change water pump in cat 3406E? This is
Hi can you help to change water pump in cat 3406E? This is the serial number 2ws37184. Thanks… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
I am working on a Caterpillar engine, C15 - Sn#6NZ01357. Using
I am working on a Caterpillar engine, C15 - Sn#6NZ01357. Using Cat ET, is there a way to program the temp that the engine cooling fan turns on? Cant get the fan to come on, let the engine get to 215 a… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
hi, my name is XXXXX XXXXX recently did a engine swap with a 3406e
hi, my name is XXXXX XXXXX recently did a engine swap with a 3406e cat from a 98 international to a 97 pete, I reused my old ecm with the international harness left untouched, everything works great, … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
sensor power feed problem , 5 volt at plug for temp sensor
my fan hub working all time, put power to pin 11 at ecm : fan hub stop....need check :sensor power feed problem , 5 volt at plug for temp sensor but when plug sensor i lost the 5 volt , cat c12 : kent… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
1996 pete with a 3406e. Fan will not come on when under load,
1996 pete with a 3406e. Fan will not come on when under load, the fan will cycle when stopped with brakes applied. Have changed fan stat and no difference. should kick in around 215, but will climb to… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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