LXi and WideBody PTO/Pump Splines

[davidbrady]

Hi Chuck,

Thanks for clarifying the process for upgrading a SAE B (7/8"-13T) PTO to a wet splined SAE BB (1.0"-15T) PTO. I'm on your heels! This upgrade is on my short list.

Concerning the use of flex hose in place of the steel U-Pipe. From our Document Library, the Chelsea 267 PTO Installation documentation, page 3, has this to say:

Chelsea strongly recommends the use of pump supports (Support Brackets) in all applications.
P.T.O. warranty will be void if a pump bracket is not used when:
1) The combined weight of pump, fittings and hose exceed 40 pounds [18.14 kg].
2) The combined length of the P.T.O. and pump is 18 inches [45.72 cm] or more from the P.T.O.
centerline to the end of the pump.

It's been a while, but I think our combined PTO + Pump length is shorter than 18 inches and I think we come in at less than 40 lbs. If not, then the steel flex pipe does serve as a support of sorts. (It's better than nothing)!

[cmillsap]

(06-29-2013 00:23)davidmbrady Wrote:  Hi Chuck,

Thanks for clarifying the process for upgrading a SAE B (7/8"-13T) PTO to a wet splined SAE BB (1.0"-15T) PTO. I'm on your heels! This upgrade is on my short list.

Concerning the use of flex hose in place of the steel U-Pipe. From our Document Library, the Chelsea 267 PTO Installation documentation, page 3, has this to say:

Chelsea strongly recommends the use of pump supports (Support Brackets) in all applications.
P.T.O. warranty will be void if a pump bracket is not used when:
1) The combined weight of pump, fittings and hose exceed 40 pounds [18.14 kg].
2) The combined length of the P.T.O. and pump is 18 inches [45.72 cm] or more from the P.T.O.
centerline to the end of the pump.

It's been a while, but I think our combined PTO + Pump length is shorter than 18 inches and I think we come in at less than 40 lbs. If not, then the steel flex pipe does serve as a support of sorts. (It's better than nothing)!

Thanks, David,

I will get the part #'s and their cost together when I know what they are for sure and post the info here. I just don't have it broken out yet.

The problem with the steel u-line is the coupling nuts have bad threads.
A new steel U-line pipe would probably have to be custom made. The present u-line configuration does include a length of flexible hose.

I haven't measured it but I think it is less than 18"s but not much less. It may also be that the 1" pump is longer than the 7/8", I don't know that it is tho. I wouldn't be surprised if the weight exceeds 40#s. There may be a convenient way to add some bracing, I'll speak to Rolando about Chelsea's recommendations. I wouldn't want the weight to fatigue the bolts and let the assembly fall off. Yikes!

[davidbrady]

(06-29-2013 01:05)cmillsap Wrote:  The present u-line configuration does include a length of flexible hose.

Hi Chuck,

There is a section of flexible hose, but on my bus there's a metal bracket attached to the top of the transmission that attaches to the U-Pipe to support it. The bracket attaches to the U-Pipe with one of these.

From our Document library, Chelsea Parts List and QCC Series 180 Pump Tech Specs:

Length:
Chelsea: centerline to end of AF flange: 4.32"
QCC Series 180-30: 6.04", weight: 20.5 lbs (This is with the standard side ported configuration, the rear port config might add another inch or two).

Combined Length: 10.36" (Plus a smidge for the rear ported config)

I think we're good with length and probably okay with weight too depending upon the weight of the fluid filled hoses; nonetheless, Chelsea recommends a rear mount in all cases.

[cmillsap]

Here's how the PTO U-line hose is installed on my bus. It is a replacement for the U-Line steel pipe.

[davidbrady]

Lookin' good Chuck!

[Darrell Snell]

How does one know when this problem needs attention?
I keep it lubed with the grease recommended by Ron Rueckwald (sp) at 3k intervals.

[davidbrady]

Darrell,

When they start to develop excessive spline wear they vibrate and sound like a box of empty coke bottles. Get things nice an hot, put the coach in neutral with the parking brake set and walk back to the foot of the bed. Listen for clanging sounds. It's sufficient that they rattle like coke bottles but it isn't necessary; that is, they can be quiet and still have lots of spline wear. The best way to tell is to unbolt the unit and visually check. We've seen coaches with as little as 45K miles that have excessive spline wear.

[Darrell Snell]

(07-03-2013 22:27)davidmbrady Wrote:  Darrell,

When they start to develop excessive spline wear they vibrate and sound like a box of empty coke bottles. Get things nice an hot, put the coach in neutral with the parking brake set and walk back to the foot of the bed. Listen for clanging sounds. It's sufficient that they rattle like coke bottles but it isn't necessary; that is, they can be quiet and still have lots of spline wear. The best way to tell is to unbolt the unit and visually check. We've seen coaches with as little as 45K miles that have excessive spline wear.

Thanks David
So far so good, but it's know on my watch list

[timetravelers]

Where are the best places to purchase the:

1. Chelsea 1" spline kit 328591-129X

2. QCC pump 1"-15T CPC 1049 CPC 030-R-2-AF-BC

& what's the delivery time?

I need to change mine, it's starting to make noises.

[pgchin]

(07-06-2013 10:56)timetravelers Wrote:  Where are the best places to purchase the:

1. Chelsea 1" spline kit 328591-129X

2. QCC pump 1"-15T CPC 1049 CPC 030-R-2-AF-BC

& what's the delivery time?

I need to change mine, it's starting to make noises.

If you have a "truck pro" in your area, they offered me the best price on the PTO. If not call the central office in Missouri and they will drop ship to your home from Chelsea. No wait, just ship time

Williams and Williams was the best price for the pump....... all this data is 1 year old 4/12....... the pumps usually takes 3 weeks from original order plus ship time.

BTW FWIW, like David, after I installed the new PTO and NEW Pump and ran it on the first 400 mile shakedown, it appears to have a "seal weep" on the output shaft of the new pump, more like a "weep". The new PTO is fine. About an ounce a run. Screw it, unless the weep turns into a leak I'll pull the pump and have my local guy change the shaft seal on the next fluid and filter change.......kinda disappointed in the company that now builds these pumps new. Most hydraulic shops can rebuild old pumps but only one company now build the pumps new..........