It took me several hundred to get enough prime in the filters to get the engine started. Studies have shown 5 – 15% fuel efficiency gains at 75% power and 15 – 30% efficiency gains at 50% power. I would expect the 3126 to be the same and question compression and blow by. Thanks dudes, I will get back to ya on this. A FUEL LEAK, IN THE PRESENCE OF AN IGNITION SOURCE, CAN RESULT IN A VEHICLE FIRE.Remedy: CATERPILLER WILL NOTIFY OWNERS AND REPAIR THE VEHICLES FREE OF CHARGE. CUMMINS QSB3.3 CM2150; CUMMINS QSB4.5/5.9/6.7 CM850 (CM2850) Had a Kubota that would shut off when hot. it starts like it ran outa fuel. There is a bleeder on the fuel pump, crack it open and pump the primer until fuel flows from it. When these engine run out of fuel, they are very hard to get primed without a hand primer. 1st thought is head gasket leaking into the fuel port that feeds the injectors in the head. I do agree when it does catch, run it up in RPM. Read about the history and technical specs of this legacy engine. I've replaced both sensors (timing and speed) under the HEUI pump. Topic: 350 Cat - C7 fuel mileage Posted By: suptrack on 03/03/13 09:09am After reading enough posts all over, it seems that the best mileage I can expect is 7.5 mpg. I have the same problem-- 2007 Phaeton Cat C7 hard to crank. The Electronic Technician's Diary - Berbagi Ilmu dan Belajar. A member of that forum responded, by saying that NO priming is needed for the 3126 or C7 engines. Answered in 59 minutes by: Then replace the plug and it should start after a little cranking. When you try to start the engine this air acts as a lock, preventing the normal supply of fuel into the cylinder. cat c7 engine starts and runs fine. Acts like it runs out fuel and when I check the secondary filter it … Then start. cat fuel in coolant. '06 Cat C9 ACERT 700,000 mi.s No APU every diesels class i have taken has said to prefill the filters with fuel. If anyone knows what it could be that would help out a lot. It makes sense not to prefill filters but is it a necesity? You must log in or register to reply here. The fuel system is self-priming. I have a 2002 f750 dump truck with a c7 cat and I’ve noticed the turbo don’t spool like it use to and can’t hear it at all but it still has power but not nearly like it did before. For C7 engines, replace with the 364-9640 Fuel Lines Kit. Like many informed owners of older CAT C7 engines, I’m aware of issues with the engine’s HEUI pump system. Just turn the key and let the fuel prime pump do its job. Menu. About a year ago this truck had a minor surging problem. I cannot see a fitting there or anything. The Electronic Technician's Diary - Berbagi Ilmu dan Belajar. Usually hidden behind a lifting bracket. However, things don't always go according to plan. Anyone else experience this? I pulled the injectors thinking an inj O-ring was leaking, but realized the inj. I added the fuel pump to my Cat C-7, the pump and gasket ran about $87. Screwed another injector on line to injector in head, cranked engine and it blew fuel. This thing has been hard to start since new. If you run out of fuel, there’s no need to “bleed” the system manually. if you have an eletric fuel pump, turn the key on and wait 30 seconds or so and shut it off and repeat a few times. You want to start the engine at about half throttle, that way if there is any air in teh system it can pass thru and wont lose the system. Mine doesn't have a primer either, I just fill the filters with injector cleaner or diesel. some filter housings have a bleed screw to let air out....freightliner is known for being differant when putting things together. For a better experience, please enable JavaScript in your browser before proceeding. no leaks in fuel system. '06 Cat C9 ACERT 700,000 mi.s No APU I have a bad fuel gauge also. If water is found in the fuel, it will be necessary to drain fuel tanks, lines and filters and refill with known good fuel of the correct grade, and replace fuel filters. weindex.info. Got another C7 cat here. 32000 miles. With this in mind, … I only have a couple cats and the only thing I can think of is that all of them have a fuel return line right there at the top of the head. Then open the bleed screw and turn the key to on. The fuel transfer pump supplies the fuel to the fuel rail at 280 psi. replaced filters. The use of a primary filter/water separator is recommended. Check fuel pressure with a gauge. to replace fuel gauge and will get the line checked then. The new common-rail injectors took injection pressures to 25,000-27,500 psi. I have a 3126 that is leaking fuel from behind the fan mound at the front of the head. O-rings do not seal out the coolant there, just the fuel from oil. Then it should start and run, may be rough, but it will clear up and run smoothly. I wondering if anyone else has had this problem. Had some no start experience with those from cracked injector sleeves. develops intermittent miss under load and no load conditions. For all other Caterpillar diesel engines (mostly older engines with pump, line and nozzle type fuel systems), the use of 4 micron(c) ab-solute or less secondary fuel filtration is strongly rec-ommended. Home; FAULT CODES. The clamp, grommet, and new fuel line that is supplied with the new fuel line kit must be used as replacements for the original parts. I would expect the 3126 to be the same and question compression and blow by. Last week the truck ran out of fuel close to a truck repair place. Posted - 03/07/2019 : 09:32:00 AM . OK, guys. More powerful than its predecessor, the C7 engine offers a maximum power output of 460 mhp at 2800 rpm. OK, guys. JavaScript is disabled. Menu. I have a 2008 Cat C7 with 92,500 miles on it and it dies very erratically, usually when coming to a stop sign or railroad tracks. I noticed when I fill up and park in storage building, I have fuel on floor under the tank. Took an oil sample to confirm the input seal of the power steering pump was leaking into the front cover so that's all good. ... Cat 277 AND 287 (1) Caterpillar 247 (2) Caterpillar 247 -267 - 257 (1) Caterpillar 3176B (1) Caterpillar 3406 Engine (2) Caterpillar 6D16 (1) Caterpillar 6NZ (1) I cannot see a fitting there or anything. Every fuel filter we change here gets filled with diesel before being put on our bulk fuel tanks have filters on them, have never had a problem in all the years. I’ve been told that providing clean filtered oil to the engine should help to minimize a HEUI pump failure. Fill the fuel tank(s) with clean diesel fuel. The Caterpillar C7 Engine was produced from 2003 - 2009 and was originally touted to be the greatest CAT Engine ever made. You may have to give it some throttle until it smooths out. I am about to put a new set of fuel filters on my 2006 M2 frieghtliner. O-rings do not seal out the coolant there, just the fuel from oil. Had some no start experience with those from cracked injector sleeves. OK, guys. Engine features include turbo-charged air intake, common rail fuel injection system, full electronic control system and Caterpillar's ACERT fuel/air management system. If you look on the engine near the secondary fuel filter, there is most likely a cap held on by two bolts. CUMMINS QSB3.3 CM2150; CUMMINS QSB4.5/5.9/6.7 CM850 (CM2850) When you pulled the injectors, did you pressurize the cylinders with a rubber tipped blowgun? Posted - 03/07/2019 : 09:32:00 AM . So here are a few things I would like to share that may or may not help you. I ran Seafoam through a couple of tanks of fuel and the problem went away. I cannot see a fitting there or anything. Started normally, ran for 30 seconds or so then died. The displacement of the C7 is 7.2 liters, or 441 cubic inches. The next morning, cranked it over ran about 30 seconds and died. The new common-rail injectors took injection pressures to 25,000-27,500 psi. However, things don't always go according to plan. 2. Cat C7 diesel chip increases MPG, Horsepower and Torque. acts like air in fuel. The Cat C7 is an inline 6-cylinder diesel fueled engine. United States Low fuel pressure: a. Below is his response: OWNERS MAY CONTACT CATERPILLAR TOLL-FREE AT 1-800-447-4986. This most often happened after they were ran out of fuel. No need to prefill them. Jump to Latest Follow ... You want to blow out the fuel system, before you start so you do not get fuel in the cylinders. Here are the steps to take in bleeding air from a diesel fuel system: 1. Recently the kids driving the truck have run it low or out of fuel and it lost it's prime. It will make life so much easier when changing the fuel filters or if the engine has been run out of fuel. ran fuel line directly to transfer pump from bucket of fuel. My dilemma is that the sample also showed 15.5% fuel dilution. The fuel transfer pump supplies the fuel to the fuel rail at 280 psi. I drive between 60 and 65MPH and average about 7 MPG. You may have to put an air nozzle, threw the injector hole and blow into it to see if coolant is leaking into the cylinder there. The fuel change dictated that the fuel system of the CAT C7 ACERT needed to change to a common-rail injection system. Advanced Member. Contents ... CAT, CATERPILLAR, their respective logos and “Caterpillar Yellow”, as well ... be modified to run on blended fuels, but extreme PREVENTIVE MEASURES MUST BE TAKEN, My question, how do you prime this CAT C& accert if there is no hand primer? OEM trained in wiring and all engine platforms for 20 years. Never really thought about prefilling filters to be bad, but will the fuel system prime if it has to expel that much air out of the filter? i believe you just turn the key and the fuel pump will prime itself, however, there may be a primer switch in the dash board, like on the volvos. United States 3820 Posts. cups/ports visible. Home; FAULT CODES. Pre-filling filters is strongly discouraged as it allows unfiltered fuel past the filters (regardless of if you fill from the outside, it's still not recommended). But you shouldnt need to prime it if it didnt run out of fuel and you fill the filter up good before you spin in back on Replace the discarded fuel line tube assembly with the 310-6031 Fuel Lines Kit for C9 engines. It dies like you turn the key off and to restart it requires alot of cranking, but it starts. Anyone else experience this? Turn off fuel valve. I have a 3126 that is leaking fuel from behind the fan mound at the front of the head. My first time changing fuel filters so this is all handy info. I posted a fuel filter question in the Cat section of another forum. equipped with common-rail fuel systems, and for all Caterpillar diesel engines that are equipped with unit injected fuel systems. The C7 is… There should also be a plug, 5/8 head. I am dealing with a 2005 GMC C7500 with a C7 Cat. I had read that you could prime the filter after replacement with about 60-70 strokes on the pump. Complaint that power steering was loosing oil and engine had blow by. Translate. I can't find a hand primer any where on the fuel system. The Engine Has Been Run Out of Fuel. A diesel will not pull the fuel from the tank to the engine if the fuel line is full of air. THE SAFETY RECALL IS EXPECTED TO BEGIN ON OR ABOUT SEPTEMBER 1, 2010. what happens is the chrome starts pealing on the cam in the heui pump and the metal go's though the fuel system and scores the injectors. No zinc anodes are required. Industries and applications powered by C7.1 engines include: Agriculture, Aircraft Ground Support, Bore/Drill Rigs, Chippers/Grinders, Combines/Harvesters, Compactors/Rollers, Compressors, Construction, … Turn the ignition switch to the "OFF" position. Clean outside of filter housing. Re-install it full of fuel. Cat C7 power chip diesel performance chips in stock. 3820 Posts, Bluenozer I have run into similar problems with cat C7 engines. Fuel Leak on 3126 Cat in Chevy C7 New Topic Reply to Topic Printer Friendly: Author: Topic : bwest Administrator. 3116 would run on either at any temperature any time. 1st thought is head gasket leaking into the fuel port that feeds the injectors in the head. No coolant in inj. no codes..any ideas? Fuel Leak on 3126 Cat in Chevy C7 New Topic Reply to Topic Printer Friendly: Author: Topic : bwest Administrator. I pulled the injectors thinking an inj O-ring was leaking, but realized the inj. When you change a diesel fuel filter, run out of fuel or disturb the fuel system, air is trapped. The C7.1 Industrial Diesel Engine is offered in ratings from 129-225 bkW (172-302 bhp) @ 2200 rpm and meets U.S. EPA Tier 4 Final, EU Stage V emission standards. Cranked it over, ran great, high idled for about 30 minutes. would suggest full injector replacement and fuel pump, as well as cleaning out the fuel rail inside the head. The Caterpillar C7 Engine was produced from 2003 - 2009 and was originally touted to be the greatest CAT Engine ever made. cups/ports visible. I think I have enough power on hills, but wondered if one of the new chips may help fuel economy? Also you may create a leak in the process. But you shouldnt need to prime it if it didnt run out of fuel and you fill the filter up good before you spin in back on. 3116 would run on either at any temperature any time. 330HP C7 Diesel Cat engine, changed the single fuel filter and didn't pre-fill, didn't go through the prime sequence. Close it and continue to pump it until you get good resistance. Screwed another injector on line to injector in head, cranked engine and it blew fuel. Can't get it to start since. We will replace the pump. C9 • C-9 • C7 DIESEL FUELS & DIESEL FUEL SYSTEMS APPLICATION AND INSTALLATION GUIDE. Had a Kubota that would shut off when hot. I dont want to risk damage to my rig. weindex.info. 6. Filters have been changed. This is the first I have ever heard of this. You must first prime the engine with fuel before attempting a successful restart. C9 • C-9 • C7 DIESEL FUELS & DIESEL FUEL SYSTEMS APPLICATION AND INSTALLATION GUIDE. He claims he has never primed his new filters with diesel fuel, ATF or anything else. The fuel change dictated that the fuel system of the CAT C7 ACERT needed to change to a common-rail injection system. Read about the history and technical specs of this legacy engine. United States 3820 Posts. 3. Valve breakage is a very common problem on the C7 … Just spin on the new filter. Replacing the proven Cat 3126B marine propulsion engine, the C7 engine from Caterpillar is touted by the company to have increased acceleration response and power, excellent fuel economy, and low emissions and smoke. I would just like to know what's going on before I take everything apart. No coolant in inj. I have a 40 ft 2007 Damon Tuscany with the C7 350 Cat. If a diesel powered truck runs out of fuel, it will not restart after you have obtained some diesel and put it in the tank. Cat fuel systems run a very high pressure and can hurt you. cylinder cut out seems equal. I'm really anal so I fill them through the outside holes not down the center so it actually gets filtered, i believe you just turn the key and the fuel pump will prime itself, however, there may be a primer switch in the dash board, like on the volvos. Cat sells the pump and injectors as a kit and has great warranty as long as its installed by a Cat repair centre or Cat mobil repair, I had an issue 2 years later and Cat replace the complete kit again. Translate. I have a 3126 that is leaking fuel from behind the fan mound at the front of the head. Contents ... CAT, CATERPILLAR, their respective logos and “Caterpillar Yellow”, as well ... be modified to run on blended fuels, but extreme … It will run the fuel pump and fill the filter. I do not recommend breaking the injector lines loose. Remove the plug and use the hand pump until fuel comes out of the plug. exhaust temps. I have appt. read normal. USE ECONOMY MODE IF AVAILABLE Running in this mode whenever possible reduces engine speed and can cut fuel usage by up to …
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