General Hood
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yep, what Flu Farm saidIf you're eventually going to switch to hydraulic fluid, you might as well start pouring it in now.
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yep, what Flu Farm saidIf you're eventually going to switch to hydraulic fluid, you might as well start pouring it in now.
OK guys, so I am a FLU419 newbe. I have read all 86 pages and as I did I was working through issues here is the write up but I have some new issues I need help with too.
My FLU has 115 miles on it. All the tires still have knobs on them. It sat in Texas for a LONG time. I bought it as a non runner.
When it arrived it was obvious the batteries were dead so I got OEM replacements ($500!). I then did some basic checks and filled her with fresh diesel and some seafoam to break things up and clean her out. I was getting no dash or starter power so I went right to the fuses first. The fuse boxes were corroded and missing most of the fuses. I cleaned the contacts and replaced the fuses. More items came to life but still no start. So I then went to the relays. I started removing them and tapping on the ground to break them free and started rotating them until I started getting power hear and there. I has two bad relays, Ignition (K1) and Start (K2). Not having 24V relays around I used 12V 30 AMP units to get her going. After priming and such she fired right up. I also had no turn signal switch so after ordering one had the pleasure of figuring out the wiring for it without a schematic. Lots of fun but now everything works as far as lights go save a burned out upper headlight (I just ordered LED replacements). Then the heater blower smoked on me. Turned out it was the capacitor inside the heater box. Since I am not running a radio and dont have any other electronics I just removed it and am back in business.
I then moved on to the implements and after fixing the excavator park lock, greasing all the fittings and such (3 days worth), the implements are all up and working. A couple of exceptions were the hi/low RPM switch (no air) and a sticky main hydraulic for stowing.
I then moved onto the air brakes. I was getting 10 PSI and that was only after a long (unsafe) drive! So never having worked on air brakes I dove in head first. I removed and cleaned and reassembled the Pump, Regulator and Alcohol injection system. There was a fair amount of corrosion and debris in the system and after a full day I had it back together. I am not convinced the pump is really putting out what it needs or should. I can hold my finger over the pump outlet and block it easily. I would love to know if this is correct of if it is weak? The reed valves looked fine and are very clean now and I used a gasket sealer for the head gasket and verified it is not leaking. I am now able to get 90+ PSI but only if run at 2K RPM and it takes a while. I have played with the regulators but even with the main regulator cranked down that is all I get. Can I get some enlightenment on the other two regulators and where they should be set? I am doing all this without an air gauge since I have yet to find an adapter for the test points, so the dash gauge is all I have. The main regulator is blowing air out the bottom so it is regulating but perhaps it is also leaking out the bottom? But is does seem to work with the adjustment screw so I am a little confused. There are no leaks in any on the lines I have found. I am getting enough air to turn off the warning light and buzzer. I also no have a working hi/low switch but it is lazy going back to low? It might need to get pulled out and cleaned too. The hi/low shifter is now working too on the tranmission.
The throttle linkage was a complete mess, I pulled out the hand throttle linkage and straightened it and readjusted everything so it works properly now.
The only other issues are a RT windshield heat that pops the fuse weather on or off? Obviously a short or relay logic? Not sure yet?
The other nasty one is the starter. It stuck on once or twice but then all of a sudden it stuck on and would not turn off! The solenoid was back so it was just spinning itself but that was still bad I had to pull the battery cable! Anybody seen this? I could simply be a bad starter but I am also thinking wiring? Any thoughts?
Thanks guys!
View attachment 646404
Welcome to our sickness.... The reservoir air pressure should be set to 105psi. The FLU has an air OVER hydraulic braking system and only uses air pressure as a booster....Think vacuum but reversed. The rest of the air system is reserved for fun things like shifting, lockers and air brake equipped trailers.OK guys, so I am a FLU419 newbe. I have read all 86 pages and as I did I was working through issues here is the write up but I have some new issues I need help with too.
My FLU has 115 miles on it. All the tires still have knobs on them. It sat in Texas for a LONG time. I bought it as a non runner.
When it arrived it was obvious the batteries were dead so I got OEM replacements ($500!). I then did some basic checks and filled her with fresh diesel and some seafoam to break things up and clean her out. I was getting no dash or starter power so I went right to the fuses first. The fuse boxes were corroded and missing most of the fuses. I cleaned the contacts and replaced the fuses. More items came to life but still no start. So I then went to the relays. I started removing them and tapping on the ground to break them free and started rotating them until I started getting power hear and there. I has two bad relays, Ignition (K1) and Start (K2). Not having 24V relays around I used 12V 30 AMP units to get her going. After priming and such she fired right up. I also had no turn signal switch so after ordering one had the pleasure of figuring out the wiring for it without a schematic. Lots of fun but now everything works as far as lights go save a burned out upper headlight (I just ordered LED replacements). Then the heater blower smoked on me. Turned out it was the capacitor inside the heater box. Since I am not running a radio and dont have any other electronics I just removed it and am back in business.
I then moved on to the implements and after fixing the excavator park lock, greasing all the fittings and such (3 days worth), the implements are all up and working. A couple of exceptions were the hi/low RPM switch (no air) and a sticky main hydraulic for stowing.
I then moved onto the air brakes. I was getting 10 PSI and that was only after a long (unsafe) drive! So never having worked on air brakes I dove in head first. I removed and cleaned and reassembled the Pump, Regulator and Alcohol injection system. There was a fair amount of corrosion and debris in the system and after a full day I had it back together. I am not convinced the pump is really putting out what it needs or should. I can hold my finger over the pump outlet and block it easily. I would love to know if this is correct of if it is weak? The reed valves looked fine and are very clean now and I used a gasket sealer for the head gasket and verified it is not leaking. I am now able to get 90+ PSI but only if run at 2K RPM and it takes a while. I have played with the regulators but even with the main regulator cranked down that is all I get. Can I get some enlightenment on the other two regulators and where they should be set? I am doing all this without an air gauge since I have yet to find an adapter for the test points, so the dash gauge is all I have. The main regulator is blowing air out the bottom so it is regulating but perhaps it is also leaking out the bottom? But is does seem to work with the adjustment screw so I am a little confused. There are no leaks in any on the lines I have found. I am getting enough air to turn off the warning light and buzzer. I also no have a working hi/low switch but it is lazy going back to low? It might need to get pulled out and cleaned too. The hi/low shifter is now working too on the tranmission.
The throttle linkage was a complete mess, I pulled out the hand throttle linkage and straightened it and readjusted everything so it works properly now.
The only other issues are a RT windshield heat that pops the fuse weather on or off? Obviously a short or relay logic? Not sure yet?
The other nasty one is the starter. It stuck on once or twice but then all of a sudden it stuck on and would not turn off! The solenoid was back so it was just spinning itself but that was still bad I had to pull the battery cable! Anybody seen this? I could simply be a bad starter but I am also thinking wiring? Any thoughts?
Thanks guys!
View attachment 646404
OK guys, so I am a FLU419 newbe. I have read all 86 pages and as I did I was working through issues here is the write up but I have some new issues I need help with too.
My FLU has 115 miles on it. All the tires still have knobs on them. It sat in Texas for a LONG time. I bought it as a non runner.
When it arrived it was obvious the batteries were dead so I got OEM replacements ($500!). I then did some basic checks and filled her with fresh diesel and some seafoam to break things up and clean her out. I was getting no dash or starter power so I went right to the fuses first. The fuse boxes were corroded and missing most of the fuses. I cleaned the contacts and replaced the fuses. More items came to life but still no start. So I then went to the relays. I started removing them and tapping on the ground to break them free and started rotating them until I started getting power hear and there. I has two bad relays, Ignition (K1) and Start (K2). Not having 24V relays around I used 12V 30 AMP units to get her going. After priming and such she fired right up. I also had no turn signal switch so after ordering one had the pleasure of figuring out the wiring for it without a schematic. Lots of fun but now everything works as far as lights go save a burned out upper headlight (I just ordered LED replacements). Then the heater blower smoked on me. Turned out it was the capacitor inside the heater box. Since I am not running a radio and dont have any other electronics I just removed it and am back in business.
I then moved on to the implements and after fixing the excavator park lock, greasing all the fittings and such (3 days worth), the implements are all up and working. A couple of exceptions were the hi/low RPM switch (no air) and a sticky main hydraulic for stowing.
I then moved onto the air brakes. I was getting 10 PSI and that was only after a long (unsafe) drive! So never having worked on air brakes I dove in head first. I removed and cleaned and reassembled the Pump, Regulator and Alcohol injection system. There was a fair amount of corrosion and debris in the system and after a full day I had it back together. I am not convinced the pump is really putting out what it needs or should. I can hold my finger over the pump outlet and block it easily. I would love to know if this is correct of if it is weak? The reed valves looked fine and are very clean now and I used a gasket sealer for the head gasket and verified it is not leaking. I am now able to get 90+ PSI but only if run at 2K RPM and it takes a while. I have played with the regulators but even with the main regulator cranked down that is all I get. Can I get some enlightenment on the other two regulators and where they should be set? I am doing all this without an air gauge since I have yet to find an adapter for the test points, so the dash gauge is all I have. The main regulator is blowing air out the bottom so it is regulating but perhaps it is also leaking out the bottom? But is does seem to work with the adjustment screw so I am a little confused. There are no leaks in any on the lines I have found. I am getting enough air to turn off the warning light and buzzer. I also no have a working hi/low switch but it is lazy going back to low? It might need to get pulled out and cleaned too. The hi/low shifter is now working too on the tranmission.
The throttle linkage was a complete mess, I pulled out the hand throttle linkage and straightened it and readjusted everything so it works properly now.
The only other issues are a RT windshield heat that pops the fuse weather on or off? Obviously a short or relay logic? Not sure yet?
The other nasty one is the starter. It stuck on once or twice but then all of a sudden it stuck on and would not turn off! The solenoid was back so it was just spinning itself but that was still bad I had to pull the battery cable! Anybody seen this? I could simply be a bad starter but I am also thinking wiring? Any thoughts?
Thanks guys!
View attachment 646404
Sad to see that even the military had to give up perfectly good Halon extinguishers for messy and corrosive powder.Peakbagger, I found that PM page you were referring to...
I would like a schematic for sure. I am thinking that the solanoid might be the issue as the starter motor runs all too well ? I will PM you.BTW, I know a guy on this forum with NOS starters and schematics, that may be of interest to you
NOT normal !! Is the fuel return line pulsating while the engine is running? What color is the smoke ( if any ) when you mash on the throttle?Since fuel discussions came up again....I noticed air bubbles on the return line side, I assume that is NOT normal? The engine runs great but I would assume it should not be making bubbles? Thoughts?
The bubbles are a constant flow with the return flow of fuel, but the smaller line right off the back of the valve cover is black so I cant see if they are coming from there or the 'T' itself which might be bad. All the bubbles seem to go back to the pump and not to the tank. The exhaust color normal grey/black, no blue or white. Runs a bit on the rich side it seems but could be normal? I am going to change out the 'T' as that might be leaking. I am strongly considering switching to rubber lines, the hard lines are a PIA!NOT normal !! Is the fuel return line pulsating while the engine is running? What color is the smoke ( if any ) when you mash on the throttle?
The bubbles are a constant flow with the return flow of fuel, but the smaller line right off the back of the valve cover is black so I cant see if they are coming from there or the 'T' itself which might be bad. All the bubbles seem to go back to the pump and not to the tank. The exhaust color normal grey/black, no blue or white. Runs a bit on the rich side it seems but could be normal? I am going to change out the 'T' as that might be leaking. I am strongly considering switching to rubber lines, the hard lines are a PIA!
Air Bubbles in your return line can be a couple things... Leaking gasket at one or more injector return fittings is suspect. There are six banjo bolts at injectors.. the seals are probably fubar and you are getting air sucked into the return line. Check the banjo bolt at the front of your injection pump.. THE BOTTOM ONE for any seepage. That is the one where the line hooks up to the "T" fitting on the return line.
If the FLU starts fine and is not smoking or surging, then the problem is the return circuit.
GASKET PART OF KIT P/N 352 010 26 21
Hope this helps...
Thanks guys for all the help...well UPDATE!!The bubbles are a constant flow with the return flow of fuel, but the smaller line right off the back of the valve cover is black so I cant see if they are coming from there or the 'T' itself which might be bad. All the bubbles seem to go back to the pump and not to the tank. The exhaust color normal grey/black, no blue or white. Runs a bit on the rich side it seems but could be normal? I am going to change out the 'T' as that might be leaking. I am strongly considering switching to rubber lines, the hard lines are a PIA!
Air Bubbles in your return line can be a couple things... Leaking gasket at one or more injector return fittings is suspect. There are six banjo bolts at injectors.. the seals are probably fubar and you are getting air sucked into the return line. Check the banjo bolt at the front of your injection pump.. THE BOTTOM ONE for any seepage. That is the one where the line hooks up to the "T" fitting on the return line.
If the FLU starts fine and is not smoking or surging, then the problem is the return circuit.
GASKET PART OF KIT P/N 352 010 26 21
Hope this helps...
I know my starter solenoid is shot as it stops with a good wack so armed with a hammer I set off driving her to get diesel and see how she runs. Well I now have a TON of air! I saw 130 PSI so I will now turn it back down! So on a long strait I got 50 MPH, but that is all she wrote. That was gear limited as I was not wanting to tach her out. Not really sure what the redline is? Had two cars stop to take pics getting fueled up
So I got home and threw my teenage daughter in the truck and we went and filled in some holes in the backyard and moved so debris to a dumpster in the park. The backhoe and loader worked flawlessly. The backhoe stow took the extended hard swing up to work but work it did. The RPM up switch worked but only to 1800 RPM so I will adjust it later. It still sticks going back to low but does eventually switch after 30-45 secs or so.
Steering was a little grabby so I will look into the power steering system tomorrow but for now she has already started to pay her keep.
I am debating whether to register her as a truck or a tractor...
SO WHO HAS A SOLENOID FOR SALE?
You can also use a Vortex Tube for spot cooling:Hey Skid, if you're wanting to freeze something, I can guaran****tee that an upside down can of keyboard duster will do the job. Works on a lock you may have lost the key too as well. Freeze it solid, then ping it with a hammer. Gloves and glasses are mandatory for that task.
Neither myself, or the other two HMMH owners I've spoken with, got the impact wrench. But, the hydraulic tools on these FLUs are just Stanley Pro. I'm also going to get a hydraulic grease gun -- my thumb had to be surgically repaired, squeezing a grease gun *that* many times on a FLU is just painful for me. One early lesson I learned, is always hand-torque lug nuts when putting wheels back on. I collect vintage dial-indicator torque wrenches, amongst other old hand tools:For those who haven't taken a tire off yet, a breaker bar and a long cheater bar is about the only way to break the bolts loose on the rim while on the road unless someone has the handy dandy HMMH impact wrench. (I picked up 4' breaker bar so I don't need the cheater anymore).
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