LA272 FEL valve... bucket drops, then lifts?

BoominSVX

New member

Equipment
B7500HST
Dec 2, 2018
2
0
0
Taunton, MA
Hi again guys. Been a while, but I finally found a clutch housing (actually a whole parts tractor) for my B7500. I split it, swapped the clutch housings, cut some welds on the backhoe subframe at the mid point that weren't supposed to be there so I cut them, and did a new shaft seal and throw-out bearing. The parts tractor only has 63 hours, so I used the flywheel, forks, clutch and pump as one unit, it runs. It works. I'm having a blast... most of the time....

From what I've found, this is a proprietary Husco front end loader control valve. I haven't ripped it apart yet, but this machine sat for years before I got it, and I'm guessing corrosion is the issue. I had 3 25" oak rounds about 18" long yesterday. Tried lifting them up to the dump truck, but with this valve, the first 1/4 of the travel pulling down will make the bucket drop, then it gets passed that and flies back up... which sends it to full height and bounces a log into the air where it (luckily) chose forward instead of backward to dive. If I let it sink a bit and take it slow, the thing will be back on the ground before I get lift back. It's controllable and I could find the hover point, but I can't use this for any precision work. I hoped to work around it, but this is more of a pain than I thought it would be. I'd love to fix it, but not sure if I really have to remove the whole valve and pull every piece apart, or if it's under one of the caps, or if I need to be on the lever side. Just wanted to ask. Any ideas derived from experience? Thanks, friends. Mike
 

North Idaho Wolfman

Moderator
Staff member
Lifetime Member

Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
33,067
8,480
113
Sandpoint, ID
I'm going to give you some real harsh advice/info.
It's not repairable, there are no serviceable seals or parts that will fix that issue.
Most of the time when I see this issue it's caused by a nick / ding / crack in either the spool valve or the housing, and it's simply no repairable.
The housings and the spools are a mated pair, you can not just replace one or the other individually hence whay they do not sel repair/ replacement parts for them.

A new valve to fix it properly for a safe operating loader is not that expensive.

Joystick valve:

https://www.surpluscenter.com/Hydra...pact-10-GPM-Joystick-Control-Valve-9-7401.axd

With this part added:

https://www.surpluscenter.com/Brands/Brand/Brand-Power-Beyond-Kit-9-7401-B.axd

or this 2 handle valve:

https://www.surpluscenter.com/Brand...rince-MB21GB5C1-DA-Valve-w-Float-9-7862-F.axd