B7800 with LA402 Loader Control Valve Problems

Jim K

New member

Equipment
B7800 LA402 Woods RD7200 Woods 7500 Backhoe Mow King Tiller 6'
Aug 21, 2022
12
1
3
Loudon NH
I have posted a few months back on this problem. Problem - control valve that came on equipment had issues where it was very jerky and would freeze up in winter. I had a mechanic work on it and he thawed it out and drilled holes in caps on bottom of spools. But the damage was done, still jerky. I replaced it with an after market Chief loader valve with float (220954) which changed problems 3 pt hitch stopped working and power beyond as well. Didn't realized because I only use power beyond when I put backhoe on. I got frustrated and finally took it to a dealer to repair, after $3100 in parts and labor it still does not work but they say its the control valve I bought is an open center valve and the Kubota LA402 uses a closed center. They wanted me to pay another $2000 to have a Kubota valve installed. So I picked up my tractor and cut my losses with them guessing.

My problem is I have not found an after market valve that has closed center and power beyond as well as 2 spools and the float on one spool. Anybody ever replaced their LA402 loader valve with after market and had success?
 

TheOldHokie

Well-known member

Equipment
L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60
Apr 6, 2021
3,322
1,593
113
Myersville, MD
windyridgefarm.us
I have posted a few months back on this problem. Problem - control valve that came on equipment had issues where it was very jerky and would freeze up in winter. I had a mechanic work on it and he thawed it out and drilled holes in caps on bottom of spools. But the damage was done, still jerky. I replaced it with an after market Chief loader valve with float (220954) which changed problems 3 pt hitch stopped working and power beyond as well. Didn't realized because I only use power beyond when I put backhoe on. I got frustrated and finally took it to a dealer to repair, after $3100 in parts and labor it still does not work but they say its the control valve I bought is an open center valve and the Kubota LA402 uses a closed center. They wanted me to pay another $2000 to have a Kubota valve installed. So I picked up my tractor and cut my losses with them guessing.

My problem is I have not found an after market valve that has closed center and power beyond as well as 2 spools and the float on one spool. Anybody ever replaced their LA402 loader valve with after market and had success?
That is BS. The loader does not use a closed center valve. Are you SURE that is what they said? It does seem your replacement loader valve is likely the problem.

Dan
 

Jim K

New member

Equipment
B7800 LA402 Woods RD7200 Woods 7500 Backhoe Mow King Tiller 6'
Aug 21, 2022
12
1
3
Loudon NH
That is BS. The loader does not use a closed center valve. Are you SURE that is what they said? It does seem your replacement loader valve is likely the problem.

Dan
That is why I picked up the tractor. They had something else new they wanted to try ever time I went it. They hardly ever called I had to stop by to catch someone to talk to about it. Worst part is they sell Kubota products at several of their locations. Never again will I take anything there. I will drive the extra 25 miles to the next closest dealer.
 

TheOldHokie

Well-known member

Equipment
L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60
Apr 6, 2021
3,322
1,593
113
Myersville, MD
windyridgefarm.us
That is why I picked up the tractor. They had something else new they wanted to try ever time I went it. They hardly ever called I had to stop by to catch someone to talk to about it. Worst part is they sell Kubota products at several of their locations. Never again will I take anything there. I will drive the extra 25 miles to the next closest dealer.
So about ypur tractor problem - did you buy the power beyond sleeve to go with your Chief valve? If you hooked it up without installing the sleeve you wont have a 3pt or power beyond for the hoe.

Dan
 

Jim K

New member

Equipment
B7800 LA402 Woods RD7200 Woods 7500 Backhoe Mow King Tiller 6'
Aug 21, 2022
12
1
3
Loudon NH
Have not been able to find one for the Chief valve. Still looking.

So about ypur tractor problem - did you buy the power beyond sleeve to go with your Chief valve? If you hooked it up without installing the sleeve you wont have a 3pt or power beyond for the hoe.

Dan
 

Jim K

New member

Equipment
B7800 LA402 Woods RD7200 Woods 7500 Backhoe Mow King Tiller 6'
Aug 21, 2022
12
1
3
Loudon NH
Just found it on Surplus Center out of Nebraska. Ordered it and should have it by Thursday.

Just to confirm I put this in the power beyond port on side of valve and install hose to other valve on top port above where I put the sleeve? I don't think I would have room enough to put hose to sleeve, loader frame real close.

Jim

Have not been able to find one for the Chief valve. Still looking.
 

TheOldHokie

Well-known member

Equipment
L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60
Apr 6, 2021
3,322
1,593
113
Myersville, MD
windyridgefarm.us
Just found it on Surplus Center out of Nebraska. Ordered it and should have it by Thursday.

Just to confirm I put this in the power beyond port on side of valve and install hose to other valve on top port above where I put the sleeve? I don't think I would have room enough to put hose to sleeve, loader frame real close.

Jim
You install it in the N port on the side of the valve. The sleeve should be connected to the hose going to the backhoe.

Dan
 

Jim K

New member

Equipment
B7800 LA402 Woods RD7200 Woods 7500 Backhoe Mow King Tiller 6'
Aug 21, 2022
12
1
3
Loudon NH
You install it in the N port on the side of the valve. The sleeve should be connected to the hose going to the backhoe.

Dan
I havent got the proper sleeve in yet but I found a fitting that fit in and blocked the return change in the valve casting. The three point hitch works now! But when I tried to hook up the backhoe the valve on it get fluid but not at enough pressure to make it work properly. So I will wait for the proper sleeve to come in. Thanks for the suggestions last night Dan, at least I can see I am headed in the right direction. $38 for a sleeve beats $1500 for new Kubota valve.
 
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TheOldHokie

Well-known member

Equipment
L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60
Apr 6, 2021
3,322
1,593
113
Myersville, MD
windyridgefarm.us
I havent got the proper sleeve in yet but I found a fitting that fit in and blocked the return change in the valve casting. The three point hitch works now! But when I tried to hook up the backhoe the valve on it get fluid but not at enough pressure to make it work properly. So I will wait for the proper sleeve to come in. Thanks for the suggestions last night Dan, at least I can see I am headed in the right direction. $38 for a sleeve beats $1500 for new Kubota valve.
Quite welcome - hope that sleeve fits and fixes your problem.

Dan
 
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Reactions: 1 user