• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

JLG 40F Early Machine Information

James Gordon

Member
Joined
Dec 23, 2021
Messages
24
Location
Iowa
Occupation
Retired HE Mechanic
I couldn't figure out how to add text to the pic so here it is. While we are one this subject, This is the other valve bank on the machine. It looks like the same style valve as the other valve bank that is FPS. Is that correct? or are they something else? Thanks again, Jim
 

1693TA

Senior Member
Joined
Feb 27, 2010
Messages
2,687
Location
Farmington IL
Occupation
FAA Radar Engineer, (Retired)
From my inexperienced eye those are also FPS valves. This is is Racine valve which you will see called "Bang-Bang" valves as they are not proportional in operation being either open, or closed.

upload_2022-1-28_11-44-21.jpeg
 

James Gordon

Member
Joined
Dec 23, 2021
Messages
24
Location
Iowa
Occupation
Retired HE Mechanic
From my inexperienced eye those are also FPS valves. This is is Racine valve which you will see called "Bang-Bang" valves as they are not proportional in operation being either open, or closed.

View attachment 252832
Yes, this is the Racine valve that I have for Hi Drive, which led me to believe it was a Racine system. That is what the wrong manual will get ya. I think I have this system figured out now. If it ever warms up, I'll finish it.
 

James Gordon

Member
Joined
Dec 23, 2021
Messages
24
Location
Iowa
Occupation
Retired HE Mechanic
I lucked out with the coil. I removed the grommet around the terminal, dug a little deeper and found the broken wire, soldered it back. Put a bolt that fit in the coil and applied voltage. It held the bolt in place till the voltage was removed. Now just needs to warm outside to finish.
I want to thank "OFF" and "1693TA" for all the time you spent with me figuring this out. The help was much appreciated. Jim,
 
  • Like
Reactions: OFF

1693TA

Senior Member
Joined
Feb 27, 2010
Messages
2,687
Location
Farmington IL
Occupation
FAA Radar Engineer, (Retired)
Great on you and thanks for the report back!! Such a simple design can really be a pain at times.....
 

OFF

Senior Member
Joined
Sep 30, 2009
Messages
1,048
Location
Alberta, Canada
Occupation
HD Mechanic
I lucked out with the coil. I removed the grommet around the terminal, dug a little deeper and found the broken wire, soldered it back. Put a bolt that fit in the coil and applied voltage. It held the bolt in place till the voltage was removed. Now just needs to warm outside to finish.
I want to thank "OFF" and "1693TA" for all the time you spent with me figuring this out. The help was much appreciated. Jim,

that's great news! I'm glad you were able to find the problem and repair it. :cool:
 
Top