Lorenz 730 Blower

[George2615]

Got a snow blower for my tractor. I wasn't really looking for one since my front QA snow plow is doing a great job plowing snow. While scanning the web the other day and I found a used older Lorenz 730 series double auger blower for sale at a price that was too good to be true. I know its an older model because 1) Newer models have paddles in the center of the augers that push snow into the fan and 2) it has a 3 blade fan and newer ones have either 4 or 6 blade. A brand new 7' double auger Lorenz with hyd. chute rotation sells for 5K and this one was less than 2K so I bought it. All the warning labels look new but the prev. owner always kept it garaged when not in use. Got it home last night and put in garage this morning. Pulled, cleaned, and lubed PTO shaft and U-joints. Replaced all shear bolts and installed spares in the holes provided. Serviced gearbox. Cleaned, lubed and adjusted chain. Cleaned and lubed chute rotating parts. Adjusted skid shoes. Sanded and primed rusty scratches and I'll repaint the whole thing this spring. I still have to install a flow restrictor in the chute rotation hose because it turns way too fast. Made some slight mods so it fits my quick hitch. Hooked it up and tested by backing into some snowbanks I have piled up and it works fine. Will try it on the next snow we get. Plus its an extra 700 lbs on the 3 pt so more weight for plowing. I've added a link to a new model version of my blower.

84" Lorenz 3-Point Tractor Snow Blower Model 731

 

[davesl708]

Good find. Great project restoring it. Enjoy.

 

[leonz]

A gallon of fluid film mixed 1 quart to one gallon of water to slick lube the entire snow caster and the impeller housing and one of Clarences large snow blower impeller kits will make the snow removal much easier for both of your snow plow and the snow caster.

 

[FatTire]

Good find, and quick work getting it ready to go. Post an update once you've been able to really test it.

 

[Captain Dirty]

Got a snow blower . . used older Lorenz 730 series double auger blower for sale at a price that was too good to be true. . .I still have to install a flow restrictor in the chute rotation hose because it turns way too fast.

Congrats on a beast of a blower.

If you just want to slow the speed, many will recommend adjustable restrictors. Fixed restrictors (little more than disks with small holes) are a fraction of the cost. My experience is that they are so inexpensive that my local hydraulic shop couldn't be bothered, and mail order shipping was disproportionately dear. I did finally get a fixed restrictor for the deflector which had been so fast as to be either full up or full down.

You may want to limit the rotation range of the chute. The chute of my Lorenz 310 series PTO snowblower rotates 360 degrees as yours also appears to (5th photo). I clear 3, pea-stone to 1-1/2" stone drives and did not wish to throw any stones back at me. At Lorenz's suggestion I installed two bolts in the appropriate notches of the toothed chute flange to limit the rotation to 270 degrees. The horizontal spur gear on the rear-remote-controlled hydraulic motor rode over the bolts, bent the "L" shaped motor mounting bracket, and continued to rotate the chute. I straightened the bracket and welded gussets to make it more robust. I also installed a crossover relief valve at the motor and adjusted the relief so the hydraulic fluid would bypass when the spur gear encountered the bolts. Worked faultlessly for 3 winters. This winter we have had wet snow/rain and the chute behaves as if water gets on the flange and freezes. I may be able to fit a 1/8" gasket of UHMW plastic under the chute and still install the clamp, or I may drill and tap the top flange for zerks and just pump in more grease than the pre-season re-lube.

(Keep an eye on the tightness of those chute clamp bolts. Even with jam nuts mine tend to back off.)

 

[George2615]

Good find, and quick work getting it ready to go. Post an update once you've been able to really test it.

It didn't really need anything other than a service and some TLC. Minor things like the PTO shaft was stuck and had a burr inside and same with the shoes. They also has burrs inside and couldn't adjust them. I expect minor repairs on any used equipment. Hopefully get to use it tomorrow as the snow prediction is 8" over the next 24 hours.

 

[George2615]

Congrats on a beast of a blower.

If you just want to slow the speed, many will recommend adjustable restrictors. Fixed restrictors (little more than disks with small holes) are a fraction of the cost. My experience is that they are so inexpensive that my local hydraulic shop couldn't be bothered, and mail order shipping was disproportionately dear. I did finally get a fixed restrictor for the deflector which had been so fast as to be either full up or full down.

You may want to limit the rotation range of the chute. The chute of my Lorenz 310 series PTO snowblower rotates 360 degrees as yours also appears to (5th photo). I clear 3, pea-stone to 1-1/2" stone drives and did not wish to throw any stones back at me. At Lorenz's suggestion I installed two bolts in the appropriate notches of the toothed chute flange to limit the rotation to 270 degrees. The horizontal spur gear on the rear-remote-controlled hydraulic motor rode over the bolts, bent the "L" shaped motor mounting bracket, and continued to rotate the chute. I straightened the bracket and welded gussets to make it more robust. I also installed a crossover relief valve at the motor and adjusted the relief so the hydraulic fluid would bypass when the spur gear encountered the bolts. Worked faultlessly for 3 winters. This winter we have had wet snow/rain and the chute behaves as if water gets on the flange and freezes. I may be able to fit a 1/8" gasket of UHMW plastic under the chute and still install the clamp, or I may drill and tap the top flange for zerks and just pump in more grease than the pre-season re-lube.

(Keep an eye on the tightness of those chute clamp bolts. Even with jam nuts mine tend to back off.)

Thanks for the info. I am going to install an adjustable flow restrictor and was also thinking of a way to limit the rotation as it does go 360*.

 

[Jimbo913]

I know this post is old but curious if you still have the blower and if you could provide me the p/n off the hydraulic pump?

 

[George2615]

I forgot about this post. I did get it all serviced and repainted. Got to use it one last snowfall in the spring and it worked great. Also got rid of snow banks that had piled up. Looking forward to using it this coming snow season.

PS to Jim, PM sent.

 

[Wild and Free]

How well does it blow the snow as in how far can it launch it? Your tractor handle it nice powerwise even in heavy snow? What works ours hard is when the snow blows in at 50+ mph it lays in like concrete and on top of that if the temps are just right and or the snow is wet when it comes like that can get and even harder crust on it which is hard as heck for a regular auger type snowblower to chew into which is why I chose to go with the Lorenz with the more aggressive beater style augers and awesome reputation they carry for durability and overall quality.

 

[George2615]

How well does it blow the snow as in how far can it launch it? Your tractor handle it nice powerwise even in heavy snow? What works ours hard is when the snow blows in at 50+ mph it lays in like concrete and on top of that if the temps are just right and or the snow is wet when it comes like that can get and even harder crust on it which is hard as heck for a regular auger type snowblower to chew into which is why I chose to go with the Lorenz with the more aggressive beater style augers and awesome reputation they carry for durability and overall quality.

As I mentioned above I only got to use it on the last snowfall earlier this year. I did use it to chew up and throw the hard packed 7' tall snow piles and it chewed them up and spit them out easily. I went into the piles slow and easy and about 2000 RPM (not at PTO speed) because it was hard. It still threw about 20' or so. I imagine fresh snow at full PTO speed would throw 30' or more.

 

[Wild and Free]

Just got my new to me 730 home. Bought it online site unseen other than 3 pics online. Doesn't look too bad overall. Need to replace 2 of the 3 seals on the gear box but that is all I see right off looks really good for being an older one being serial # 375. Will get the gear box oil changed tomorrow and mounted up to the new to me Bobcat CT450 tractor and will get some pics to post up for everyone.
Here is the online PDF operations, maintenance and parts manual for the 30 series Lorenz snowblowers.

http://www.lorenzmfg.com/Manuals/30SERIES June 2006.pdf

 

[Wild and Free]

Here is my new toy. Got to replace the input seal and get a longer pto shaft made other than that she is ready for business.

 

[Wild and Free]

Just for reference if anyone ever needs to change a leaky seal on the Lorenz 30 series gear box here are some part #'s.
There are 3 seals all the same on the gear box.
Seal dimensions are 1-1/4 inch shaft diameter by 2 7/16" outside diameter by 3/8" wide / thick however one wants to refer to it lol.
Lorenz part # is 010444
Seal that came out of mine was a TCM # 12243SC
crosses to a Timken / National seal # 471818
and the SKF / CR seal # 12621
SKF / CR is what I am installing as that's what my local parts house gets.

 

[George2615]

Thanks for the info.

 

[FatTire]

Just for reference if anyone ever needs to change a leaky seal on the Lorenz 30 series gear box here are some part #'s.
There are 3 seals all the same on the gear box.
Seal dimensions are 1-1/4 inch shaft diameter by 2 7/16" outside diameter by 3/8" wide / thick however one wants to refer to it lol.
Lorenz part # is 010444
Seal that came out of mine was a TCM # 12243SC
crosses to a Timken / National seal # 471818
and the SKF / CR seal # 12621
SKF / CR is what I am installing as that's what my local parts house gets.

That's great to post info like that. Someone will feel like they hit the jackpot when they find this in a search months or years from now.

 

[Wild and Free]

You guys are welcome!
I like to share info that is actually meaningful and factual when I can to eliminate the BS and opinion type stuff that clutters up threads.
Sorry i hijacked this thread but since it was titled for a specific model I wanted to keep it simple as i think it helps cut down on forum clutter too.

Ha Ha, Just picked up the seals, SKF box part # 12621 on box, take seal out of box and it is a national seal part # 471818 inside.:laughing:
As my post above shows I have the correct part #'s but didn't expect this lol.

 

[Wild and Free]

Well my good deal isn't so good anymore. Replaced the input seal today popped the top off the gear case and cleaned out the sludge and crap from having moisture in it and lack of maintenance over the years the way it looked filled with new oil and installed PTO shaft and hooked it up and ran it for a few minutes at rated speed to make sure nothing else was going to fly apart lol.
Spending money on it in a big way. PTO shaft was way too short so had local driveline shop build a complete new one $600.
Replace JD ends with Pioneer male ends and hooked up the Hydraulic chute / spout rotational motor and hit the lever a couple times and no turn and oil squirting out between the sections of the motor, removed it and it's completely shot. So found a brand new aftermarket replacement on e-bay for $113 free ship and 2 year warranty, new Char-lynn eaton motor is $300+shipping.
Just as reference old Char-lynn Eaton PN was 130-1001-003
New Char-lynn Eaton Motor # is 101-1001-009.
NEW AFTERMARKET CHAR-LYNN 11-11-9 / EATON 11-11 MOTOR | eBay

Oh the joys of buying someone else's used stuff.:confused2:

 

[Wild and Free]

Got to try my blower out for the first time a couple days ago, had some drifts in my yard that were about 2 feet deep, had to adjust the angle a couple times as i relocated a fair amount of gravel and sod lol. Got that done and am super impressed at how this thing eats snow and how far it throws it is purely amazing. I have a longish driveway so by the time i get to the end about the last half of the distance is once blown snow already and it ate this stuff up like nothing, didn't even phase the performance like it does most other blowers. I am impressed to say the least, did have one auger shaft bearing begin to fail have it apart right now and will get a new one next week.

Lorenz part # is 010021
replacement bearing part # is SBPF 205-16
SBPF25-16 Flanged Mounted Bearing, 3 Bolt, 1" Inside Diameter, Set screw Lock, Steel, Inch: Bearing Houses: Amazon.com: Industrial & Scientific

 

[Jimbo913]

I am finishing up rebuilding an older 630. Converted to hydraulic rotation, electric chute power angle, new chain, replaced all bearings (if yours set out and became rusted, plan for a tough job), replaced most all hardware and painted. Still need to put on the new decals.
Working on an upgraded chute rotation bearing plate to replace to horrible factory metal on metal design.
Couple words of advice. If you buy any parts trom Lorenz order them ALL at the same time because they don稚 quote freight and I was suprised when the <1lb $30 chute clamp cost me $20 shipping.
If you have blown geabox seals, make sure that the fill plug breather hole is not plugged with dirt or paint because they will just blow out again replacement.