Slowing down hydraulic snowblower controls

[sailorman3]

I have a 72 inch Pto snowblower on my ck3510 tractor. The chute moves much to fast up and down as well as sideways. I know I can install a needle valve to adjust the speed but I really don’t want to install four one way valves and bidirectional valves are not at my disposal. If I installed a piece of round stock with a hole drilled through the Centre in the lines where they attach to a threaded coupling, will this work? It shouldn’t be any different than the valve.

 

[oldnslo]

Is the rotate a motor or a cylinder? If a cylinder you just an orifice in one line typically the cap end.

If a motor you may have to have an orifice in each line metering oil in and free reverse flow to prevent back pressure which could damage shaft seals.

 

[zzvyb6]

My broom swing cylinder lines have brass disc inserts that have about a 1/2 mm or less restrictor oriface disc hole in them. about a mm thick. JD part no. N204464. But, these lines have flat faced connections, not pipe or tapered.

 

[Farmer495]

Are you running a hydrostatic and running the engine at PTO RPM continuously? One option is to just feather the levers,

i.e partially move them, rather than move them to full detent.

If I go full detent on my snow blower at PTO RPM I can slam the chute pretty hard, feather valve handle and it's smooth and fast enough.

 

[sailorman3]

Is the rotate a motor or a cylinder? If a cylinder you just an orifice in one line typically the cap end.

If a motor you may have to have an orifice in each line metering oil in and free reverse flow to prevent back pressure which could damage shaft seals.

Both have cylinders.

Are you running a hydrostatic and running the engine at PTO RPM continuously? One option is to just feather the levers,

i.e partially move them, rather than move them to full detent.

If I go full detent on my snow blower at PTO RPM I can slam the chute pretty hard, feather valve handle and it's smooth and fast enough.

even trying to feather the levers they move to fast. I have to run it at full pto speed while moving and need to adjust the chute as I go.

 

[Farmer495]

Both have cylinders.

even trying to feather the levers they move to fast. I have to run it at full pto speed while moving and need to adjust the chute as I go.

Might want just do the needle valves then. Some tractors have flow control on the remote valves.

$49.99 at princess auto, may need some fittings if you aren't ORB.

https://www.princessauto.com/en/12-gpm-high-pressure-needle-valve/product/PA0008689507

 

[Halftrack]

TSC has restricted fittings available (male and female pipe threads) with an approx. 1/16 in hole for flow control. They can be drilled larger if too slow. One per cylinder should suffice. I have a number of them in use on: a front mounted snowblower lift cylinder, a dump cylinder on a 3 pt mixer, a swing cylinder on a 3 pt rake, and a top link for the 3 pt lift.

 

[Halftrack]

https://www.tractorsupply.com/tsc/product/countyline-1-2-in-male-pipe-x-1-2-in-female-pipe-swivel-restricted-orifice-8mp-8fpxr-tsc-1256783

1/2 & 3/8 size

 

[sailorman3]

Might want just do the needle valves then. Some tractors have flow control on the remote valves.

$49.99 at princess auto, may need some fittings if you aren't ORB.

https://www.princessauto.com/en/12-gpm-high-pressure-needle-valve/product/PA0008689507

My lines are in a bracket where the needle valve would have to go. I already saw them at Princessauto and unfortunately there wouldn’t be enough room for four. That’s why I’m looking for an alternative.

 

[sailorman3]

TSC has restricted fittings available (male and female pipe threads) with an approx. 1/16 in hole for flow control. They can be drilled larger if too slow. One per cylinder should suffice. I have a number of them in use on: a front mounted snowblower lift cylinder, a dump cylinder on a 3 pt mixer, a swing cylinder on a 3 pt rake, and a top link for the 3 pt lift.

Unfortunately I have no access to a TSC, but I’ve seen those and I would purchase them if I had access. I can’t seem to find that particular valve in Canada.

 

[old and tired]

My needle valve works in both directions, so only needed 2 of them... there are ones that only work in one direction.

 

[ptsg]

There is usually an adapter between the hose and the actuator (motor or cylinder).

What I've done in the past, was to partially tap the hole in the adapter, then just use set screws of the same thread with a very small hole drilled (this can be drilled till you find the sweet spot or even do various set screws with difference hole sizes).

Finally install the set screw in the adapter, which will bottom out on the thread, hence why it's a partial thread and won't go all the way through, so it's locked in place. There is not real need for any thread locker or sealant.

 

[sailorman3]

My needle valve works in both directions, so only needed 2 of them... there are ones that only work in one direction.

I’m unable to find a bidirectional needle vale in any hydraulic shops in my area and can’t seem to find one on line either. The ones that show bidirectional have only one arrow on them. I already ordered one but I had to send it back because it wouldn’t work.

 

[oldnslo]

A simple needle valve restricts in both directions and may or may not have any arrows. A flow control that restricts in one direction and free flows the other will typically have an arrow showing direction of controlled flow.