Injector line leak

Steel Soldiers is supported by:

Mass Ownage

New member
46
0
0
Location
sulphur, LA
I've got a leak where the #4 line screw into the HH. I've checked the head for cracks and none. It slowly seeps out from the threads of the line. I've replaced the line and that slowed it down but it will not seal completely. I tried rotating the line a little, and that didn't work. Any ideas, tricks or suggestions? I replaced the line with one for TNJMurray, they use a metric nut and probably came from china, but they were the only ones I could find.
 

m-35tom

Well-known member
Supporting Vendor
2,904
38
48
Location
eldersburg maryland
they do not have to be very tight. more than likely it is the plug in the center of the HH that is leaking. you would not always see a crack, but it is very high pressure. the fix for many people ends up being a new HH.
 

Mass Ownage

New member
46
0
0
Location
sulphur, LA
Thanks for the info. You can see the leak start at the #4 line. It pools around the treads then leaks into the rest of the pump. At idle it's a very slow leak.
 

RobM36A2

Member
299
3
18
Location
The Netherlands
I have something similar going on, its seeping from #6 or the middle bolt.
got the middle one out, cleaned and inspected, nothing to see. Start and run idle, no leaks, went to inspection, it drips all over.
 

Mass Ownage

New member
46
0
0
Location
sulphur, LA
I tried removing the center bolt but couldn't get it to break loose and I didn't want to break anything. Might try putting a breaker bar on it.
 

Rusty nuts

New member
91
0
0
Location
Oregun
I am having the same issue on a couple of my lines. It is coming from the threads as I start to see it getting wet at the center of the rubber cap and when I lift the cap with a screwdriver, diesel run out from under the cap. I have tried tightening them and it got better but is still weeping a little.
 

Mass Ownage

New member
46
0
0
Location
sulphur, LA
I read on another post where a couple guys changed just the ferrules. Anyone have the Napa part #s. no good counterman work the part houses here anymore. If its not in their computer by year make and model they can't find it. I told him a 1966 M35A2 and he gave me a blank look...
 

volver

New member
57
0
0
Location
Moline, IL.
Was this ever resolved?

I was 75 miles into a 200 mile road trip when I noticed the leak. It looked like it was coming for under the HH I figured it was just a bad O-ring. It was a slow trickle of a leak

I drove another 25 miles to the destination. It felt a little under powered. It was leaking worse when I stopped.
After a 1 hour cool down I started the return trip. The truck would not go faster than 45 mph.
When I arrived home the truck would not go faster than 35mph. It died in the drive way.

After investigating further I found a leak on injection lines 2,4,6. I trimmed the old line to remove the ferrule. I replaced with a bite ferrule available at Grainger. Grainger # 1DCH2 Parker Model # 4 TU-S. It was a 1/4" bite ferrule.

This did not slow the leak one bit. The engine will start if you use staring fluid and 1/2 throttle. If you drop below 750 rpm the engine will die.

It seams odd that 3 injection lines would start leaking all at the same time.

I suspect a cracked hydraulic head.

What do you experts think?
 

rustystud

Well-known member
8,487
103
48
Location
Woodinville, Washington
Was this ever resolved?

I was 75 miles into a 200 mile road trip when I noticed the leak. It looked like it was coming for under the HH I figured it was just a bad O-ring. It was a slow trickle of a leak

I drove another 25 miles to the destination. It felt a little under powered. It was leaking worse when I stopped.
After a 1 hour cool down I started the return trip. The truck would not go faster than 45 mph.
When I arrived home the truck would not go faster than 35mph. It died in the drive way.

After investigating further I found a leak on injection lines 2,4,6. I trimmed the old line to remove the ferrule. I replaced with a bite ferrule available at Grainger. Grainger # 1DCH2 Parker Model # 4 TU-S. It was a 1/4" bite ferrule.

This did not slow the leak one bit. The engine will start if you use staring fluid and 1/2 throttle. If you drop below 750 rpm the engine will die.

It seams odd that 3 injection lines would start leaking all at the same time.

I suspect a cracked hydraulic head.

What do you experts think?
Did you actually have leaking from the injector lines ? If so did the new ferrules stop the leaks ? If the leaks have stopped then yes you might have a bad Hydraulic Head. I would first check the fuel filters before doing anything else. Then check the fuel pump, then check the Hydraulic Head.
 

Floridianson

Well-known member
Steel Soldiers Supporter
Supporting Vendor
6,268
214
63
Location
Interlachen Fl.
From what I read looks like you have more than one problem. When I am looking for a leak at the head I cut off the stupid tin number cover. Just right down your firing order. Then I clean off the head and run/inspect to locate where the leak really is.
I have not seen the parker fittings and know nothing about them but the fittings that are on our lines are made to spin at the tips to prevent twisting of the line. The hard starting could be many things so you will need to start with the leak then move on to the main fuel control. Then from there you might need to check delivery valve or overflow valve.
 
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website like our supporting vendors. Their ads help keep Steel Soldiers going. Please consider disabling your ad blockers for the site. Thanks!

I've Disabled AdBlock
No Thanks