Larry Cobb
Member
Mine has both, now what?
Electric Clutch engages the shaft which turns the blower.
I am talking about PTO's WITHOUT an electric clutch . . .
which is the weak link.
Larry
Mine has both, now what?
Electric Clutch engages the shaft which turns the blower.
I "think" Lar is talking about a real PTO (drive shaft/transfer case)Mine has both, now what?
Electric Clutch engages the shaft which turns the blower.
Jus sayin ; )
I had 22000 hrs on my '87 electric clutch before the van rusted out and close to 10000 hrs on my present electric clutch on my '03 WM. Just exactly when does the weak link come into play?
I'm pretty sure my vac motor is maxxed out. When I've run the engine RPMs up to 2000 and the lift set at 20" then the belts on the blower start to slip and fail after about 45 minutes, so I keep the RPMs at 1600 and the lift at 16" which it handles easily. I don't know what the vac motor RPMs are but the CFMs seem to be double that of my 230 cfm Air Hog Plus so it would appear that the Roots 56 blower is running at it's 500 cfm capacity.when you try to run that blower at, or near it's full capacity .
None of the direct drive TMs run their blowers anywhere near the blower's capacity
..L.T.A.
Mine has both, now what?
Electric Clutch engages the shaft which turns the blower.
Jus sayin ; )
I'm pretty sure my vac motor is maxxed out. When I've run the engine RPMs up to 2000 and the lift set at 20" then the belts on the blower start to slip and fail after about 45 minutes, so I keep the RPMs at 1600 and the lift at 16" which it handles easily.
What I'm saying is the blower just can't go any faster without overheating. It is turning much faster than the 1600 rpm van engine speed. Maybe 2-1, I don't know.White Magic used a water cooling device on the blower for their hi-vac version that was run at 2000 van engine rpms and 20 lift but I don't have that.only reenforces my point, Art
nowhere near maxed out @2000 RPM..
AND you have problems before you even get near max
..L.T.A.
I have a 34 horse 47 blower machine nick built for me and the 34 hp kohler seems to have plenty of power. After doing some resurch the Judson c4 was pushing a 4008 gardner Denver blower on a 30hp briggs if Im not mistaken, the 454ss was using a 35hp briggs or vanguard maybe to push the 4008 also and I think the titan 575 also runs the equivalent. I thinkThat is because a 47 requires 5 more hp than a 45 to spin at any useful rpm. The 45 doesn't develop 15-16" until a much higher RPM. At 2620rpm the 47 blower is already developing 14" and more cfm than the 45 is capable of......
BUT I have seen what I think is a 39hp 47 blower (direct coupled) option built by Nick...so the power is available...but I still think Larry is FOS
Where is Bawb?
In denial about the limitations of the pitts clutch he uses.......
Ive heard from several people that running an air cooled engine such as a kohler like mine well below its maximum rpm's is actualy harder on the enging because the cooling fan doesn't draw in as much fresh air to cool the engine.s
Larry since my 47 machine is a direct coupled slide in with a 34hp kohler, what rpm in your opinion should I be running my unit at for normal use to avoid unwanted wear and tear?absolutely true, Jon
30hp is actually plenty to run a 47.
Matter of fact, TM manufactures generally use larger than needed engines simply due to increase heat for HX'ers
...not power needs .
If you look at blower manufacture HP specs needed to drive blowers, you'll be surprised how little they actually require ..
I'll venture a guess a 47 only needs 15 to 18HP...add 4 or 5 HP for the pump and "needs" are actually lower than most realize
it isn't power you're lacking ..it's the torque on the drive line where your issues will manifest.
spinning 47 and up blowers to capacity put WAY more stress on the system
..L.T.A.
Larry since my 47 machine is a direct coupled slide in with a 34hp kohler, what rpm in your opinion should I be running my unit at for normal use to avoid unwanted wear and tear?
only reenforces my point, Art
nowhere near maxed out @2000 RPM..
AND you have problems before you even get near max .L.T.A.
if the 45 was so good.....WTF would a company spend hundreds of thousands
tooling up for production of a 47....?
All the major manufacturers make and sell lots of both sizes.
ohh...and in 40 years of using an electric clutch...
i have NEVER ever fried one........~
jebus Lee...i cleant a LOT a carpet.......so you haven't really cleaned that many carpets?
about TEN GRANDWhat's the difference between clutch and transmission driven PTO?
Thanks Chris. Mine is clutch driven too. Which is better and why? Hope I'm not hijacking this thread ;-)
The Clean Machine