Power pack build

[Greenland South]

Does anyone know of a link to a hydraulic power pack build. I want to mount a snowblower to the front end loader and I don't have enough flow with the tractor hydraulics. Done some searching, coming up empty.
I had this posted over in the Build It Yourself section. teg suggested I post it here.
Thanks

 

[Leejohn]

How much flow does your snowblower need?

 

[Greenland South]

I haven't bought one yet, but the few I've looked at on line require 18-21 GPM.
I've been pushing snow with the bucket for a few years now, slow process at times. Facing backwards does not appeal to me in the least. I know these systems, if bought at retail can be quite pricey. 10k with the blower in my neighbourhood. Thought if I could save a couple grand by building the power pack, it would be worth doing. I'm a hydraulic rookie, so I might be out to lunch.

 

[katoomed00]

Would a pto driven pump work instead of a separate power pack? Should be able to get some ideas for that on youtube. Surely a lot cheaper too.

 

[teg]

Would a pto driven pump work instead of a separate power pack? Should be able to get some ideas for that on youtube. Surely a lot cheaper too.

The pump will need a reserve of hydraulic oil to pump from (and to dissipate heat) just don't know how big of a tank. Like all pressure systems, you'll need a bypass valve back to the tank to release excess pressure if something happens...

 

[teg]

Some reading material...

http://www.tractorbynet.com/forums/hydraulics/323100-need-help-hydraulic-snow-blower.html

http://www.tractorbynet.com/forums/...aulic-snowblower-pump-motor-calculations.html

...but no one with an actual build.


Store bought one...
MIE Manufactures Three Point Auxiliary Power Units

 

[katoomed00]

Aluminum tanks and relief valves are cheap and can be mounted anywhere, since it's winter an oil cooler probably won't be necessary.

 

[jmc]

I haven't bought one yet, but the few I've looked at on line require 18-21 GPM.

You will also need the pressure required at that flow rate to calculate power supply horsepower. Found this pretty quickly online:

{Power required by a a pump with 20 gpm capacity and 1500 psi pressure can be calculated as
PHP = (20 gpm) (1500 psi) / 1714= 17.5 HP

Efficiency
Note that the equation above can be used for a 100% efficient pump - which in the practial life is never true. An overall efficiency of 80 - 95% is common. The equation above can be modified to

PHP = q p / ((μ / 100) 1714)
where μ = overall efficiency (%)}

What are your power supply choices for 15 to 30 hp? Can you put a front PTO on your NH?

 

[Everhard]

Are you talking about putting a regular 3pth snowblower onto your fel? There are a number of posts about doing just that and running the snowblower off an engine that's mounted along with the snowblower. So it runs separately from the tractor. But looking at the tractor you've got - I'd have thought you've got enough power to run a hydraulic system? Hang a hydraulic pump off the rear pto, and either have the reservoir tank hanging off the 3pth for ballast (you'll need something anyway.) and then plumb lines up the snowblower on the fel run off a hydraulic motor. Also set up a valve so you can control the snow blower - on/off. If you keep that system somehow modular and not specific to the snowblower you could use it for other things - post hole digger for example. (hydraulic post hole digger is so much nicer than a pto one plus you can mount it on the fel etc etc.)

Anyway look up those posts of guys running snowblowers with a separate motor on the fel - even if you're going with the hydraulic idea at least that will give you good ideas on mounting the snowblower for the rest your build should be simpler since you don't have to figure in a separate motor as well.

Last thought - go get a 3pth snowblower and blow snow backwards for now while you figure out what you want to do. Yes it's not as nice as driving forwards but it beats using your bucket by a long shot!!! Then once you figure out how to adapt it to the fel, well you'll have it there to hook up. Also if for some reason the system doesn't work at some point you can always revert back to using it on the rear. Options. I like options.

E.

 

[Farmerford]

See old topic I brought up today in Owning and Operating forum.

 

[oldnslo]

possibly check with a hydraulic distributor that builds systems in your area. They could provide the expertise to make your system meat your requirements Vs I have a pile of components and hope they work.

 

[teg]

See old topic I brought up today in Owning and Operating forum.

Link to his thread:
http://www.tractorbynet.com/forums/owning-operating/95678-mower-fel.html#post1086898

 

[robstaples]

I built mine. 20 gal per min pump, 25 gal tank, return filter, pressure relief, pressure gage, hoses, 3pt hitch frame ( had custom built). Will find pictures tomorrow most all parts were from Surplus Center.
Rob

 

[oldnslo]

Does anyone know of a link to a hydraulic power pack build. I want to mount a snowblower to the front end loader and I don't have enough flow with the tractor hydraulics. Done some searching, coming up empty.
I had this posted over in the Build It Yourself section. teg suggested I post it here.
Thanks

I found this site.

Loftness "PowerPak" Tractor PTO-Driven Hydraulic Power Unit / Power Pack Model HPP25C / HPP33C / HPP40C

 

[CJONE]

1st find out the GPM and pressure your blower requires. There are many ways to build a power pack. The cheapest is to use a high cube gear pump or a PTO pump [same basic thing] Most of them have a 2500psi limit. a pressure relief that will handle your GPM spec, a return line filter and tank. Looks like the link that oldnslo posted uses a rpm increaser to a inexpensive aluminum gear pump. Like I said, a bunch of different ways to do it. Mine will have a pto pump with a drive shaft so I don't have to fight the weight and hoses on the pump. This is just a general power pack. When I build my blower unit I will either go open loop piston units or closed loop hydrostat. Just because I have it all available and I can run smaller lines to the front of the tractor at higher pressure. CJ

 

[Greenland South]

Thanks for the interest and links.
Tractor only has a hydraulic pump capacity of 9.8 GPM. So a power pack is really my only option if I want to run hydraulic attachments. The PTO is rated at 38 hp.
I'm not at all experienced with hydraulics, so any pictures or parts lists anyone has for a build would certainly help me out. We have a Princes Auto discount retailer near by that should have most of the parts I would need.
Most of the blowers I've looked at require in the range of 21 GPM.
Luckily our winter has been more tropical than normal(thank you El Niño). We can still see the grass. Last year I think we had close to 4' of the white stuff by now. Hence my desire for a front mounted blower.

 

[robstaples]

This is most of what I used. Still need fittings and hoses for pump tank connections and suction side.
Purchase Requisition Request
No:
Surplus Center
PO Box 82209
Lincon, NE 68501

Phone: 800-488-3407
Fax: 877-474-5198

PO Number:___________
Date:________________
Name:_____________________________________
Address:___________________________________
City:__________________St:_____ Zip:___________
Phone:___________________
Fax:_____________________
QTY Item No. Description Price Each In Stock Extended Price
2 9-8313 3/4" NPT FLUSH FACE QUICK COUPLER SET ISO 16028 $56.95 Yes $113.90
1 9-1047-1-C 9.9 CU IN PRINCE HC-PTO-1AC PTO PUMP CI 540 RPM $553.05 Yes $553.05
1 9-6135-75-H 3/4" NPT 30 GPM 1500-3000 PSI RELIEF VALVE RV-2H $43.65 Yes $43.65
1 9-8103-20 20 GALLON HYDRAULIC RESERVOIR / TANK $194.95 Yes $194.95
1 9-8282 1-1/4" NPT 25 GPM 141 MICRON ZINGA SUCTION FILTER $43.95 Yes $43.95
1 21-1044 3000 PSI 2.5" LF LM GAUGE $11.95 Yes $11.95
2 9-078-120 3/4" X 120" 3/4 NPTM X 3/4 NPTM 3100 PSI HYD HOSE $43.95 Yes $87.90
Subtotal: $1,049.35
Tax: ___________
Shipping: ___________
Handling: $2.00
Total: ___________
Reference Number: 100164273

 

[Greenland South]

Thanks for posting your parts list, it will help a lot.