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Is this a pressure-timed system? The governor controls engine power by fuel pressure. For these engines, restriction on the return line can cause s runaway so it would make sense that a restricted return would prevent the engine from returning to idle

Whatever you do, don't suck through a secondary filter. The restriction is too high.

The primary filter goes on the suction side of the lift pump, secondary filter goes on the discharge side of the lift pump.

If you disconnect the starter positive (just lift the battery cable at battery) and put 24V directly to the solenoid signal terminal it will push the gear out without turning the starter.

I have personally had to swap the solenoid on a DB4 pump that was mis-ordered. I purchased the ETSO solenoid for a 24V application through Diamond Diesel but any Stanadyne distributor should be able to order one.

You can install the ETSO solenoid in your pump housing and eliminate this risk of failure. The ETSO solenoid can only fail in a run position. It also allows the engine to keep running if you lose an alternator. It allows the engine to run without any draw on the batteries. This part is...

Look from the starter nose where the solenoid attaches. It says "No Shim"

Not to be a negative Nancy but that's a lot of pipe goo on those fittings. Use Loctite 545 or equivalent in the future or better, housings with o-ring boss ports. Copper was not a preferred material for diesel fuel systems due to bad interactions with the sulfur in the fuel. With ULSD I would...

Two problems, the injection pump contains quite a bit of fuel and will keep the engine running for some time. Second, the injection pump relies on a steady stream of fuel for cooling and lubrication. You NEVER want to starve the IP for fuel. There are actually two pumps in the housing, a vane...

Read me: https://www.dieselplace.com/attachments/108-electrical-shutoff-solenoid-service-pdf.648848/ You want the ETSO solenoid or else you'll be shoving a rag in the intake every time you need to stop your engine.

For those trying to bypass the solenoid, it's not cutting off fuel with a valve, it's moving the injection pump to the zero stroke position so that the pump no longer delivers fuel, overriding the governor. It can't be bypassed. FYI, you can order the shutdown solenoid in an energize to stop...

Always had this on mine as well. The alternators need a little more speed to excite and start charging. Everything always worked fine, though.

If you want a gear reduction starter you want a Delco 28MT starter. OEM pad mount units aren't the easiest to find but the pad mount nose is available for tens of dollars which let's you convert any starter. The 28MT starters are very strong. The hardest part about changing a starer is...

The horn switch has a flyback diode that fails in short circuit. Cut the diode out and all will be good. I forgot where the diode is exactly.

Do you have dimensions, pictures, description?

Don't use petroleum jelly. It's a bad habit. Silicone grease is is what should be used as it doesn't deteriorate EPDM rubber components. Internet cheapskates substituted petroleum jelly because it's also a clear grease but color isn't the only part of the story.

Hoo-boy. The HUEI Cat engines are good until they aren't. The repair costs are astronomical. They run forever for some and are nightmares for others. Clean, high quality oil is essential. The injectors are so expensive one failure will offset any savings running cheap oil. I would use a high...

I didn't mean to say we didn't have significant risk from failures of hard lines, just that one never caused the death of an engine. The above lube pipe failure I mentioned would dump 25-35 gallons of oil within an hour. It required a shutdown of the engine but didn't cause additional damage. I...

The problem with soft lines is that theyre difficult to specify. It's especially difficult for the average Joe to make the correct selection. The hose shops don't know, either. Back to the hard lines, I've never had one cause a failure of an engine, just shutdowns. Don't keep running it if it's...

I get the misfortune of racking up a lot of hours on a lot of engines. There are certainly locations that you're going to experience repeat failures. The Cats are especially prone to breaking hard lines. There have been a few cases where we solved problems using rubber hoses. Also know that Cat...