Kenworth you can use forward and reverse and all forward if the pto is on the transfercase, It would be the same as one on the back box on a set of boxes.

 

Hey guys, forgive me if I'm confused, but as far as I can see, the pto can't involve any of the gear ratios in the transmission because you typically run it when the vehicle is stopped -- that is to say, clutch out, trany in neutral, not moving... Although you could have an application where it's used while moving, it generally does also work while stopped, so it can't be related to the turning of the wheels. Also, if it did work that way, you'd be stuck correlating the pto speed to the gear choice and consequently the vehicle speed. I think logically a pto has to run off the front section of the trany that's always turning when the clutch is out, regardless of gear selection or neutral.

Any body have any tips for swapping a pto between zf5 transmissions? What to look for? How to measure/set the gear lash? The source is a 93 SD with a big gas engine and the destination is a 95 Powerstroke...would that make a difference?

 

If the PTO is on the TRANSFER CASE, you could in theory use it with any combination of forward or reverse speeds set on the TRANSMISSION.

If the PTO is on the TRANSMISSION, it only works on one speed and is driven by the first gear on the countershaft (basically running off the input shaft).

A ZF has two PTO ports, one on either side of the transmission. One side, I can't remember which, sits a little lower. To measure the gear lash pull the cover off the other side of the transmission. Then you can wiggle the countershaft gear to measure the gear lash. I know I've seen the specs in one of the service manuals I have at home, if no one else chimes in with them I might be able to look it up tonight or tomorrow.

I'm not sure it it would make a difference going from the gas to the diesel engine, do you know the gear ratios for both? If they match I think you're fine, if they don't match, the input gear on the PTO might not mesh. The gear can be swapped if you can find a place that does PTO's

 

onboard air off the pto would be cool..

 

Yah that would be cool, and pretty handy.

 

I have a pto on my zf5

Its on the drivers side, sorry no pictures.

I don't know if youre not SUPPOSED to use it in gear, but I have. Engage clutch (disengage from flywheel), engage PTO, release clutch (engage flywheel), enjoy

More throttle means it moves faster. I've left the pto engaged when moving around the farm to warm up the fluid in sub freezing temps. Is it bad for the PTO? I hope not

 

A PTO can be run with the vehicle moving, just be careful not to overspeed whatever you are driving. I had a driver burn up a $5000 vacuum pump on a semi by leaving it engaged going down the road.
Also watch out that whatever you are driving doesn't drive the truck. Some things with a lot of inertial mass can keep the truck moving even with the clutch in, since the PTO is directly driven by the countershaft. This is why tractors have an overrunning clutch on the PTO.

Sent from my Brigadier using IB AutoGroup

 

Zombie Thread, been dead for 6 years.

 

Not dead if we're still sharing good info

 

Hey guys, I'm full of PTO questions and I finally had a chance to crawl under my trucks to check things out.

I have a '93 F-Superduty (F450) 2WD 460 gas engine, ZF5 transmission w/brake and a Chelsea pto driving a hydraulic pump mounted about a foot & a half back via shaft with 2 u-joints.

I want to swap this pto/pump and dump bed onto my '95 F350 7.3L Powerstroke, ZF5 4WD. The complete info from the ID tags is below.

1: Will this swap work. Does that PTO work on my new trany?
2: Is there a hydraulic pump I can mount directly to this PTO? It looks like the transfer case on my new truck may be in the way of mounting the hydraulic pump where it was on the old 2wd F450.
3: Can the PTO mount on either side of the ZF5? or is it made specific for one side.

Thanks guys!!!


“Donor” ’93 F-Superduty 2WD 460 gas engine ZF5 Trany w/ parking brake
Model: S 5-42
ZF Parts List #: 1307 050 080
Transmission Serial #: 8397497
Ford Parts #: F2TA-7003-RA
Total Ratio: 5.72 - 0.76
Spedo Gear: —
Build Date: 031693
Oil Cap: 3.2L
Oil Grade: ESP-M2C 166-H
Made In: USA

Putting PTO onto: ’95 F350 4WD 7.3L Powerstroke ZF5 w/ BW1356
Model: S 5-42
ZF Parts List #: 1307 050 109
Transmission Serial #: 8557110
Ford Parts #: F4TA-7003-FC
Total Ratio: 4.14-0.77
Spedo Gear: --
Build Date: 112294
Oil Cap: 3.2L
Oil Grade: E6AZ-19582-P
Made In: USA

Chelsea PTO (Made in USA - Dana Corp.)
MOdel #: 420XQEDX-W3XD
Date S/N: K93
Mounted on drivers side of transmission

Hydraulic Pump - Commercial Intertech
Part No. 312-9610-246
Ser. No. N091-6894
Mounted about a foot and a half back on an added cross-member
shaft with 2 U-joints connecting

 

1: I'm not sure if the input gear/countershaft gear is the same or different for the different ratio ZF's. I may be able to figure that out looking at the parts files I have on my desktop at home. If the gear is different, you could get a different gear for the PTO that will work.
In short, it will bolt up, but I don't know for certain if the gear will mesh.

2: You would have to talk to a shop that does this stuff, but my guess is no, that PTO is meant for a shaft. However it is possible that there is some pump with a bracket that could bolt onto your PTO

3: Yes it can be attached at either port, and that may solve your problem with the transfer case, but it may also run into the exhaust...

 

I found an available pto off a '89 f450 with zf5 and 7.3L diesel.

Reportedly it's the setup that Ford sold it with, but I haven't had a chance to see it for myself or get a model yet.

Just wondering if any one has any knowledge of what it would be. One question: it's an electrically activated pto. Is that good or bad? I've only ever used the cable activated kind with a push/pull in cab. seems like it would be nice to save the space and just have a switch on the dash, and in my experience the cable can take some muscles to operate which can be awkward depending on where it's located.

Also found a '92 f350 4x4 wrecker with a 7.3L diesel, zf5 and an available PTO, but I don't know much about it and it's a little harder to get.

 

Sorry, I posted in wrong thread....I need bifocals, cant see this stupid phone half the time!

 

My PTO is cable actuated

 

Bit late to the party here, buuuut

I have a pic of a Chelsea PTO on the driver side of a zf5. 95 F350 DRW 4x4 460. Has a direct mount hydraulic pump for running a dump bed. The pto is cable operated.



Also, most all BW1356 transfer cases were built without the PTO provision. Only certain ones, like in this f350 had the special front case half with the PTO port.

Sure, a PTO can be driven in multiple speeds, but the items the PTO normally drives are rated for a certain input RPM. Many of them, the number is 540 RPM, at least on tractors. Running a brush hog at a higher rpm than its rated for will inevitably destroy something.