MaX28XlL is 98 lb weakling, Main Pump Pressure Low

drajj5 · Mar 30, 2015

Anytime!

Good luck, I am sure you will get it to do whatever it is you need it to do.

David Devuono · Apr 2, 2015

My B3200 is of similar size but less advertized power on the loader. That advertized lift is at the bucket pivot pin and not the bucket front edge. For sure it should break out a bucket of soft snow. What size bucket on the loader? I use a 54 inch for snow but for hard digging I use a 48 inch toothed bucket which has more acceptible break out force. If your tractor has a 60 inch bucket, you may be experiencing normal operation. Good Luck

mike69440 · Apr 2, 2015

David Devuono said:
My B3200 is of similar size but less advertized power on the loader. That advertized lift is at the bucket pivot pin and not the bucket front edge. For sure it should break out a bucket of soft snow. What size bucket on the loader? I use a 54 inch for snow but for hard digging I use a 48 inch toothed bucket which has more acceptible break out force. If your tractor has a 60 inch bucket, you may be experiencing normal operation. Good Luck

Best thing I ever did was to put Ecso teeth on my L39 Bucket. I'm considering a tootbar, maybe a BXpanded Piranha for the Max.
The Max28 (ML205?) Loader comes with a 52" bucket that is about 7 Cu Ft. I ordered fittings and a short piece of hose by mail order to hook up my 5,000 psi gauge.
I pulled the engine side covers to get a look at my new tractor. Having the engine panels off made it a lot clearer as to how the hydraulics was routed.

**** that oil dipstick is not so easy to reach! Kind of a pain.
Maybe this weekend I can get to some welding on the stuff I'm doing to the tractor.

Snow is finally beginning to melt. Supposed to be almost 60 F tomorrow!

mike69440 · Apr 10, 2015

Rather than post my results in numerous locations, here os the link to post #55 in kubota-buying-pricing
http://www.tractorbynet.com/forums/...98-l45-tlb-4n1-thumb-tulsa-6.html#post4104276

My Max28 is about 100 psi low on pressure. Does anyone know if Mahindra sells shims for the relief valve?

mike69440 · Apr 11, 2015

Max28 is up to Spec

Many thanks to Dave at Dave´s tractor and drajj5 for their help in assisting me in adjusting my Max28 so that it performs to spec and then a just a bit more, rather than living with factory pressure below spec.

I think I'll leave the pressure gage on the loader valve for a while.

Today I got the grill guard welded, the front weight brack fabricated, and ut sunshade bracket done on the Max28, but I spent most of the day repairing and reinforcing he QA and frame to my L39's old Fisher plow, taking off the tire chains, putting the loader bucket on and greasing the rest of my equipment.

The Max28XL lifted the +750lb. plow, but without ballast sure was light on the rear. The smaller Kubota I just sold could not quite lift the plow.

It is way too muddy for field work, beside the is still snow in spots., But tommorrw I'll finally get some seat time that does not involve !#)_*$*&()!! plowing snow, taking down some fencing, a few trees, and moving rock with the Excavator & L39.

oldpilgrim · Apr 11, 2015

Exactly what did you do and how did you do it? im sure others would like to know.

mike69440 · Apr 12, 2015

oldpilgrim said:
Exactly what did you do and how did you do it? I’m sure others would like to know.

The Hydraulic Block is right below the Oil filter.

I thank Dave at Dave tractor for telling me to use a 27 MM socket, 1/2" Drive with 3" extension and a breaker bar to remove the relief valve.

I used an 0.035" thin stainless washer, about 11/16" OD. and a dab of grease to holt it in the top of the cap.

This gave me about 2400 psi pressure, so I backed off the relief in the loader valve to drop the pressure to a bit over the high side of the tolerance. The spec range of the pressure is 2060 to 2130 PSI. I set the relief on the loader to 2200 PSI at about 1500 RPM. All in all, I only increased the pressure 300 PSI but it makes enough of a difference the loader seems right for the size of the Max28. On a good note. the pressure only changed 50-100 PSIG between idle and 2500 RPM, indicating the pump internal tolerances are not recirculating much.

Without ballast, if you pick up a load on the corner of the bucket, one rear tire comes off ground. If a load is in the center, the rears stay on ground and the loader goes into relief. The engine & oil pump do not strain with the hydraulics going into relief. Given the size of the tractor, that's all I can expect.

Removable ag type loaders are flexi so I'm not going to be reckless banging into immoveable objects or drive into pliesr eal hard. The Loader on the L39 is far more rigid, as it is part of a sub frame and this will do the heavy lifting around my place.

Now that thats taken care of, I really need to get my combination 3 Pt. QA hitch, removeable counter weight, tow-draw bar, middle buster, ripper shank, tool boxes, sprayer tank holder, and TOOL CARRIER welded together. I nearly ran over my chain saw as it bounced out of the bucket. Never carry anything valuable moving fast in the bucket.

drajj5 · Apr 15, 2015

Sounds like you got it set as my loader will do the same. Wife asked to pluck some daylilies/irises (flowers that have bulbs), so I thought I would just hook the corner of the bucket just underneath them,"they have multiplied over the years and you could no longer reach the birdbath that was centered in a 6' diameter mass of flowers. Scared/uneasy as I felt the opposite rear tire lift off the ground. Buggers were so thick I had to used the backhoe to separate the mass of bulbs.

cgendron · Apr 17, 2015

Sounds like you have that front loader working as advertised now. I have a MAX 28 also. Last fall I was able to lift half pallets of sod off the ground. I have pallet forks that attach to the bucket. We did move the rolls of sod all to one side of the pallet before lifting. The center of the weight was still about two feet in front of the pins where they quote the 1400 lb lift capacity. But basically I was lifting about 1100 lbs two feet in front of the pins. I was pretty happy about that. Couldn't tilt the bucket, but I could at least lift it. Plus I put two people on the back of the tractor for ballast. LOL

later,
Curt

DavesTractor · Apr 17, 2015

Glad you got this performing Mike. The Max22/24/25 and the larger Max26/28 are strong performers, but not with low pressure. System pressure must be at spec, nothing lower will do as that is how the specs in the brochures are calculated. If anyone else has a Max XL model and it isn't a little hot rod of a tractor, have your dealer check pressures the next time you have it in for service.