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  1. S

    JLG 40HT no reverse, other issues and repairs

    just went and messed with it some more. ohmed at 6 ohms. put a meter on the coil lead and could read 13 VDC. put meter inline to measure amp draw and got no amps. reconnected, now it works. ghost in the machine I guess. Also, I found my serial number: 0308609993 for posterity, more part...
  2. S

    JLG boneyard or salvager for obsolete parts

    just went and messed with it some more. ohmed at 6 ohms. put a meter on the coil lead and could read 13 VDC. put meter inline to measure amp draw and got no amps. reconnected, now it works. ghost in the machine I guess.
  3. S

    JLG boneyard or salvager for obsolete parts

    Hi Moon, I did put it on the bench and cycled 3 or so times with 12V and it worked. I ended up swapping the coil on the boom lower prop valve and that proved it was something with the solenoid and not controls or hydraulics. I've got a troubleshooting thread here...
  4. S

    JLG boneyard or salvager for obsolete parts

    Got off the phone with JLG, and got some equivalent Vickers Part numbers: 689610 Solenoid Coil [7009315 (coil and frame, round) has been superseded by Item 7020361 (KIT, COIL 12V FLYING LEAD), OBSOLETE] 7009360 (Adaptor Kit, OBSOLETE) contained the following Vickers part numbers: 686035 core...
  5. S

    JLG boneyard or salvager for obsolete parts

    Hi All, I have a 1986 JLG 40HT. I am looking for a square solenoid for the vickers type prop valve block. The original square solenoids are obsolete, and the superseded parts are also obsolete. Looking for leads on a salvager in the US or some other JLG parts wizard who could advise. The...
  6. S

    JLG 40HT no reverse, other issues and repairs

    Finally had a nice day and was able to get back to this. Wouldn't you know, I swapped the reverse solenoid with one of the lift solenoids and BAM, both forward and reverse works and the lift-lower now does not. It really confuses me because I pulled the suspect solenoid out and bench tested...
  7. S

    JLG 40HT no reverse, other issues and repairs

    Hi, Yeah I put a meter on the leads to the coil and verified 12V when I tell it to reverse. I pulled the coil and actuated it on the bench, and measured it approximately same OHM as the coils next to it, so I think it is in the prop valve. I have zero experience with rebuilding a valve like...
  8. S

    JLG 40HT no reverse, other issues and repairs

    Hi Off, I did that today and it did change from not driving reverse to not driving forward, so I think it is an issue with the valve block in the first pic of my last post. I'll swap them back to normal so I can at least drive forward and try not to drive into a corner again.
  9. S

    Fair Value:

    How does JLG dealer service work? when I search on their site, it only shows me Sunbelt and United Rental and the like. Mine is a 1986 40HT and I just figured there was no hope in getting real parts support. Thanks!
  10. S

    JLG 40HT no reverse, other issues and repairs

    Replaced 3 of the 4 hoses for the platform level and rotate. The 4th goes to the platform level cylinder inside the boom and I didn't know how I was going to get to that one (also I was afraid to have my hands chopped off when I pulled the line off of the cylinder and if it shifted). Looks...
  11. S

    Fair Value:

    instead of the 9v, I was using one of those amazon jump starter batteries that outputs 12v for boost, just to be sure I was getting right volts to saturate the coil. maybe I am overthinking it
  12. S

    JLG 40HT no reverse, other issues and repairs

    I think my next step will be to swap the drive output hoses before tearing into the "working section" AKA 7006760
  13. S

    JLG 40HT no reverse, other issues and repairs

    I can't edit my post and links to Imgur didn't work (maybe because I am new), so here is the post on Imgur https://imgur.com/a/P7rRWeG
  14. S

    Fair Value:

    Great read! I'm starting my own journey on a 40HT, mostly functional with a few exceptions. The electric controls I can figure out, but the valve blocks are new to me. Luckily everything is obsolete on mine as well! Regardless, your story has given me the motivation to dig in and fix it...
  15. S

    JLG 40HT no reverse, other issues and repairs

    Hi all, This is kind of long, but I tried to include a lot of detail I'm hoping there's a JLG wizard out there who can give me some pointers. Basically I need help figuring out how to get reverse working again, or how I can put this thing in "tow mode" so I can roll it back some and steer it...
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