Grovecomm
Active Member
Jonesy, you certainly have ambition. Your cable tray looks great. I see your electric cable cost $1000, do you have any idea what the hydraulic lines are going to be? Makes me wonder if it's worth rebuilding my early 40F.
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The JLG 40F Boom Lift Dilemma
- Thread starter od1
- Start date
OFF
Senior Member
There's no easy way to release the swing brake. No "quick release" or anything like that. If it's got the external disc brake with caliper setup, you could just de-adjust it. But be warned, gravity is unstoppable. The counter weight will always seek the lowest point. Fun ride as long as there is nothing in your way.
OFF
Senior Member
Any automotive electrical rebuilder (starters and alternators/generators) will be able to rebuild your pump motor for you
RPM I believe is 1400 on low, 2400 on high. The solenoid pulls the governor linkage onto high engine.
Jonesy
Member
Grovecomm...I have no idea what the hydraulic lines will cost. I have a local guy who does that kind of thing. I have five lines off now. Two of them are the two long ones to the basket cylinder. I think I'll take the first five lines to him and see what I'm in for dollar-wise.
Grovecomm
Active Member
I have a John Deere 310 backhoe/loader that has had several hydraulic lines break, even short, small diameter hoses are painful in the pocket book. I can't imagine what replacing everything on the 40F will cost. Keep us posted please.
Jonesy
Member
Rough estimate on all hydraulic lines: My supplier says that the two 40' lines (approx.) will run about $350 each. So, that's $700 for the pair. If there is another 80 ft. of lines & fittings on the lift, that would put me at about $1500 or so, for the whole thing. He told me there are 4 or 5 levels (quality, durability, PSI rating) for hydraulic lines. He rates the stuff he uses at about a 4. I am personally not well versed in hydraulic hose applications, therefore, I bow to his expertise. He has a mobile enclosed trailer completely devoted to hydraulic lines & fittings. He does a lot of work for the railroad. I guess I'll trust his judgment for now.
Jonesy
Member
Hydraulic lines...continued: As I recall, my hydraulic line guy told me he liked to use Weatherhead hose, double steel braided under rubber, with fittings that actually bite into the first steel braid. He said they will not come loose, and are not 'flared' on the hose end so that they won't get 'hung-up' when you're sliding them through things. From what I can tell, a 3,000 PSI working pressure is what I need to achieve. Does anyone have an argument against any of the above?
Grovecomm
Active Member
Good luck with the hydraulic Jonesy.
Grovecomm
Active Member
I'm considering replacing my 30 HP Wisconsin VH4D engine with a new Kohler CH940-2002 engine. My VH4D needs almost $4000 in repair after the oil pump gear split in two, destroyed the remaining gear train and starved the engine of oil until it seized. I believe the hydraulic pump spool piece bolt pattern difference will be the biggest problem, possibly requiring a new spool piece to be made or modified. I would appreciate thoughts or alternatives. Thanks all.
OFF
Senior Member
sorry to hear about the death of your Wisconsin
That Kohler certainly has the HP you need. Not sure if the lighter weight would effect the balance of the machine. If it does, you can always add counter weight to make up the difference. I'm sure your spool piece will need need some mods, no big deal if you know the right people. The other alternative would be an air cooled diesel like Deutz, Hatz, or even a Lister. Let the adventure begin!
The bonus with a diesel powered manlift is fuel economy.
Grovecomm
Active Member
Thanks OFF. Are there any other advantages to diesel? This is only a hobby machine for 40 acres in WI for trees, roof repairs, small crane, etc., I don't think fuel economy will be much of an issue for me. Will diesel fuel age issues, cold weather starting, etc., be more of an issue than spark plugs and a carburetor???? I can buy that Kohler engine for around $2000, do you have any idea what diesel would cost? These are all homework issues for me prior to purchasing.
oceanobob
Senior Member
I was curious to learn what tires I should be installing on my machine (a 40)? It has 15 inch rims, the steer tires are implement (agricultural) tires and the size is 12 wide, ribbed tread style with a tube. The drive tires are 15 inch rims, they are tires from a pickup with an all terrain type tread, size 11.50-15, with tubes.
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I learned I can get the 'ag' type tires but the tire guy was nervous at first because it is a "man lift", then he called back and agreed it would be OK; he also said the pickup truck tires were definitely a poor choice. If I do the smooth ribbed implement tires at all four corners that selection may be adverse to traction....which is kind of silly since the machine is only 2wd and has a four point frame.
Any suggestions?
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I learned I can get the 'ag' type tires but the tire guy was nervous at first because it is a "man lift", then he called back and agreed it would be OK; he also said the pickup truck tires were definitely a poor choice. If I do the smooth ribbed implement tires at all four corners that selection may be adverse to traction....which is kind of silly since the machine is only 2wd and has a four point frame.
Any suggestions?
I think I would be looking for something used on a 4wd backhoe front axle? Designed to carry mucho weight with a good traction tread.
Grovecomm
Active Member
I have a John Deere 310, 4WD loader/backhoe. When I replaced the front tires they turned out to be the same tire used on large skid-steers. Skid-steer tires are quite popular and may work on your JLG40????? Just a thought.
oceanobob
Senior Member
The so called ag implement tires size 12-15 are in the tire shop - these ones are ribbed and are likely going to be similar to the ones on the machine's steer axle. There is some thought the bias ply of the tires allows them to last longer (in respect to storage degradation, uv, etc).
As to the drive axle, I may look around and try the used 'pickup truck all terrain' tire once again. I note a typical farm tractor drive tire tread is available in this size, but on parking lots this could wear perhaps, so the old school military mud snow tire could be the solution for the drive axle.
The load capacity ratings of the tires (ag vs pickup) aren't that much different. Foam-fill could be a recommendation but with the four point solid frame, some tire 'mushing and flexing' helps to cross uneven surfaces.
As to the drive axle, I may look around and try the used 'pickup truck all terrain' tire once again. I note a typical farm tractor drive tire tread is available in this size, but on parking lots this could wear perhaps, so the old school military mud snow tire could be the solution for the drive axle.
The load capacity ratings of the tires (ag vs pickup) aren't that much different. Foam-fill could be a recommendation but with the four point solid frame, some tire 'mushing and flexing' helps to cross uneven surfaces.
George66
New Member
@ Jonesy, ..Hello, ..yes, my joystick problems have been resolved, only by cutting new ones out on the machine lathe, ..I checked around everyplace I could to find these, ..near to impossible it seems to find an exact replacement, ..other than switching to newer styled stick units, I really wanted the originals, so , that is what I did on mine. The springs, were an easy fix, NAPA auto had the exact springs there, but I went with a slightly larger o.d. on the coil, that made them a little stiffer to move, but not bad. Sticks are back in and working good. Thanks OFF, and Willie59 on your inputs , next thing I think I may need is a cap and rotor, points and condenser, getting I little tough to start. Good luck on your rebuild, these things are only getting older and tougher to get things for. G
George66
New Member
The 40 
f, in action ,,..
f, in action ,,..oceanobob
Senior Member
I got some tires:
-for the steers I got the same size 12.5-15 implement tires. New ones are American Farmer, old ones Armstrong. The new ones are huge - feel like they could be used on a lunar rover. Would never guess these are the same size designation.
-for the drives I replaced these with some 10.50-15 all weather pickup truck tires. Same as what was removed.
New tubes in all. Can't install rims and tires yet as I am looking for some wheel bearings on the steer.
Anticipating there may be some rake to the rig.
-for the steers I got the same size 12.5-15 implement tires. New ones are American Farmer, old ones Armstrong. The new ones are huge - feel like they could be used on a lunar rover. Would never guess these are the same size designation.
-for the drives I replaced these with some 10.50-15 all weather pickup truck tires. Same as what was removed.
New tubes in all. Can't install rims and tires yet as I am looking for some wheel bearings on the steer.
Anticipating there may be some rake to the rig.
Jonesy
Member
George66.....Looks good! Thanks for the info on the NAPA springs.