KZJ70 PTO hydraulic pump install

[WojtekSz]

Hello
I am looking for some advice on fixing the hydraulic pump (approx 25ccm) to typical Toyota single speed PTO case. This is supposed to drive the MM 12000 hydraulic winch.
My idea is to replace the side bearing cover with a special wider case to which i could fix the separation case and the pump body itself. I am just wondering if such solution can handle the nesessary forces.
Anyone has done something similar?

 

[PurpleFJ62]

i have never seen a hydraulic winch. seems better than using electricity. So your going to drive this off your transfercase? Can you post up some pics of what your working with?

 

[lowenbrau]

I'm running a 10gal/min PTO pump off the PTO on my BJ74. It runs a hydraulic Superwinch.

I've had the system in a couple of trucks and it pulls fast and hard (breaks 5/16" Amsteel Blue) but if I could do it again (especially now with the Toyboy in the middle) I'd run a big pump off the engine. I'd let the PTO run a compressor.

 

[WojtekSz]

PurpleFJ62:
i will post pictures as the work will start to progress

Lowenbrau:
how is your pomp fixed to the PTO? I have some ideas but would love to see some pictures of the existing solution ...10gal/min meand some 40liters/minute so quite a lot - i plan to go as high as 70liters/min at 3000rev/min - and this speed would be used only very rarely. Typical revs would be between 1000 and 2000 rev/min. The winch is strong 12000lb as well but already twice i had to use a pulley.

 

[lowenbrau]

PurpleFJ62:
i will post pictures as the work will start to progress

Lowenbrau:
how is your pomp fixed to the PTO? I have some ideas but would love to see some pictures of the existing solution ...10gal/min meand some 40liters/minute so quite a lot - i plan to go as high as 70liters/min at 3000rev/min - and this speed would be used only very rarely. Typical revs would be between 1000 and 2000 rev/min. The winch is strong 12000lb as well but already twice i had to use a pulley.

My pump is on the crossmember above the rear axle, connected by a driveshaft to the PTO. You'll never get 3000 RPM out of the PTO in low range. 1500 is hard enough.

 

[WojtekSz]

now i see the difference in design concept: i am thinking of fixing the pump directly to the PTO case so there will be no drive driveshaft. and the engine vibrations will be taken out by the elastic piping connecting the pump to the rest of hydraulic system.

you are absolutely right about the revs in low range - so either i will have to swich to higher capacity pump or swich the transfer into high gear

but is that referring to the advice i have heard to use PTO with transfercase set to neutral (of course then there will be no wheel rotation)

 

[lowenbrau]

now i see the difference in design concept: i am thinking of fixing the pump directly to the PTO case so there will be no drive driveshaft. and the engine vibrations will be taken out by the elastic piping connecting the pump to the rest of hydraulic system.

you are absolutely right about the revs in low range - so either i will have to swich to higher capacity pump or swich the transfer into high gear

but is that referring to the advice i have heard to use PTO with transfercase set to neutral (of course then there will be no wheel rotation)

Sorry I was thinking about my intermediate case. In your case the PTO speed is independent of high/low range. I do use mine in neutral quite a bit. Self recovery can be a bit of a pain to match wheel speed with winch speed. This is where it would be fabulous to have the pump on the engine. Put both boxes in low range and then winch with the wheels barely turning. I didn't feel that I had sufficient room to mount a big pump right to the case though I've seen some pretty compact SAE spec ones.

 

[Elbert]

do they not make a pump that will mount directly to the transmission? Where you would just have hydraulic hose running between a resivor-winch-pump... Driving the pump remotely off a jack shaft is comparable to the old school mechanical PTO driven/gear and chain type setups for winches.

 

[WojtekSz]

Elbert
the thing is that they do not make such pumps yet it is possible to fix a soluton similar to upgrading rear axle to full floater: take out the small bearing cover and replace with something much bigger:
replace with larger diameter cover to which you fix another cup-like-cover to which bottom central hole a pump is fixed. This way you have pump fixed to the PTO box with a space beteween where the shafts can be connected with some kind of dog cluch.
The pump is some 15cm x 15cm x 15cm cube, the cup-like-cover is some 12cm diameter and 11cm high.
And the only problem is that it is fixed to light PTO body with just 4 x (6..8mm) bolts on about 75 mm diameter so it would be strong and nice enough (it should be nice 'coz the nice solutions usually prove to be much sounder than ugly ones)

this is where a time for innovative solutions is called for

 

[PurpleFJ62]

cool pic lowenbrau,

so there is another driveshaft....thats how it works.

couldent you set your t-case in neutral and change speed with the trans, since it will still dump tourqe at a certin rpm into the t-case?

sorry, as i have no idea how all this cool non usa stuff works. we get all the s*** here.
cheers

 

[lowenbrau]

cool pic lowenbrau,

so there is another driveshaft....thats how it works.

couldent you set your t-case in neutral and change speed with the trans, since it will still dump tourqe at a certin rpm into the t-case?

sorry, as i have no idea how all this cool non usa stuff works. we get all the s*** here.
cheers

Yes, how you described is pretty much how I use it. It works perfectly for recovering other vehicles and because of the fast line speed it is pretty good for self recovery but it is pretty hard to self recover and turn the wheels (like on a ledge) the wheels have to be spinning pretty well in in order for the winch to be turning.

AS far as non-USA goes... With the exception of the PTO itself. Pretty much everything else is made in the USA. Oh I take that back, the hydraulic valve might be Italian

 

[PurpleFJ62]

from my understanding many cruisers outside of north america came with pto winches, I am a fan of mechanical power transfer when compared to electric.

What does the part that bolts into the t-case look like? Where can they be found? Does it use traditional JIC fittings or something unique to that application?