B2400 HST 4wd - Partially stripped bolt housing

NickAdams

Member

Equipment
B-2400 HSD
Jan 11, 2021
48
18
8
22642
Prior to using Loctite 236382 4.8-ML. Form-A-Thread Stripped Thread Repair Kit, I spoke to Loctite technical support - she said that the product was discontinued over 2 years ago (and there was no similar product from Loctite currently for sale). She indicated that because the product was on the shelf for so long, it may not harden correctly. I am aware of no other similar product from any other manufacturer. I carefully cleaned the threads and used a wool dauber (sort of like cotton ball on a stick) to stop anything from falling into the valve. I cut the "stick" so I could easily remove it after application of the Loctite. Then I applied the Loctite to a sacrificial bolt and screwed into the bolt hole per the instructions. When I removed the bolt after 5 minutes, the threads did not look perfect - the Loctite did not fully adhere to the stripped hole but did substantially adhere. I cannot explain why it did not perfectly adhere - I do not think hydraulic fluid caused the failure because: i) I carefully cleaned the threads in the hole and ii) the failure occurred on the high side of the hole where the hydraulic fluid would not flow.

In any event, I waited about an hour and installed the bolt (also used removable Loctite on the threads), spring, "stopper" and a new o-ring. I tightened the bolt snugly but not as tight as I would normally because I doubted the Loctite threads.

The assembly does not leak - no seeping - dry as can be. Time will tell - but for now, I am calling this a win. Thanks so much for all the help I received from this forum.
 
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Reactions: 3 users

NickAdams

Member

Equipment
B-2400 HSD
Jan 11, 2021
48
18
8
22642
Prior to using Loctite 236382 4.8-ML. Form-A-Thread Stripped Thread Repair Kit, I spoke to Loctite technical support - she said that the product was discontinued over 2 years ago (and there was no similar product from Loctite currently for sale). She indicated that because the product was on the shelf for so long, it may not harden correctly. I am aware of no other similar product from any other manufacturer. I carefully cleaned the threads and used a wool dauber (sort of like cotton ball on a stick) to stop anything from falling into the valve. I cut the "stick" so I could easily remove it after application of the Loctite. Then I applied the Loctite to a sacrificial bolt and screwed into the bolt hole per the instructions. When I removed the bolt after 5 minutes, the threads did not look perfect - the Loctite did not fully adhere to the stripped hole but did substantially adhere. I cannot explain why it did not perfectly adhere - I do not think hydraulic fluid caused the failure because: i) I carefully cleaned the threads in the hole and ii) the failure occurred on the high side of the hole where the hydraulic fluid would not flow.

In any event, I waited about an hour and installed the bolt (also used removable Loctite on the threads), spring, "stopper" and a new o-ring. I tightened the bolt snugly but not as tight as I would normally because I doubted the Loctite threads.

The assembly does not leak - no seeping - dry as can be. Time will tell - but for now, I am calling this a win. Thanks so much for all the help I received from this forum.
 

NickAdams

Member

Equipment
B-2400 HSD
Jan 11, 2021
48
18
8
22642
Sadly, I worked the tractor really hard today moving tree limbs- and it leaked at the same. bolt. I tighten it a little more but it did not bottom out. I used it a little more and it did not leak - but I am doubtful. Assuming it does leak - I have the following plan(s) -

1. I will have tomorrow Loctite 545 Automotive Pneumatic/Hydraulic Pipe Thread Sealant Purple. I will try it at the first sign of leaking. I believe that when the tractor is off and the hydraulic pressure released, I will not lose substantial fluid?
2. I could add a second washer?
3. If that doesn't work, I can find someone with the skills to heli coil it - maybe.
4. If the above does not work, I could try epoxying the bolt it place (as opposed to trying to fix the thread with Loctite)?

Your thoughts are appreciated. Thanks
 

TheOldHokie

Well-known member
Lifetime Member

Equipment
L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60
Apr 6, 2021
9,108
4,763
113
Myersville, MD
windyridgefarm.us
Sadly, I worked the tractor really hard today moving tree limbs- and it leaked at the same. bolt. I tighten it a little more but it did not bottom out. I used it a little more and it did not leak - but I am doubtful. Assuming it does leak - I have the following plan(s) -

1. I will have tomorrow Loctite 545 Automotive Pneumatic/Hydraulic Pipe Thread Sealant Purple. I will try it at the first sign of leaking. I believe that when the tractor is off and the hydraulic pressure released, I will not lose substantial fluid?
2. I could add a second washer?
3. If that doesn't work, I can find someone with the skills to heli coil it - maybe.
4. If the above does not work, I could try epoxying the bolt it place (as opposed to trying to fix the thread with Loctite)?

Your thoughts are appreciated. Thanks
Fix the stripped thread using a thread repair insert (Heli-coil, etc).

Dan