LXi and WideBody PTO/Pump Splines

[davidbrady]

Folks,

Some time ago I worked on and provided a solution to the early PTO/Pump spline failure that some of us see on our Series-60 equipped LX[i]'s and WideBodies. For those who don't know, the PTO and pump assembly is what provides hydraulic power to our hydraulic engine cooling fan assemblies. The PTO bolts to the transmission and spins the hydraulic pump.

The problem is that the 7/8"-13T SAE 'B' splines aren't strong enough. Going to the 1"-15T is markedly better and if cared for properly (or if wet splined) should achieve lifetimes on the order of the Allison transmissions.

Chelsea provides the 1" splined PTO and QCC provides the pump. The system is proven on our buses.

Part numbers:
The original Pump, 7/8"-13T spline: CPC 1040 CPC 030-R-2-AA-BC
The upgrade Pump, 1"-15T spline: CPC 1049 CPC 030-R-2-AF-BC

The original PTO, greasable, 7/8"-13T spine: 267XDFJP-M5GK
The upgrade PTO, greaseable, 1"-15T spline: 267XDFJP-M5GF

The original PTO, wet-spline, 7/8"-13T: 267XDFJWM5AK
The upgrade PTO, wet-spline, 1"-15T: 267XDFJW-M5AF

The 'field serviceable' 7/8"-13T, wet spline kit: 328591-141X
The 'field serviceable' 1"-15T, wet spline kit: 328591-129X

Additional part number:
The 'field serviceable' 1"-15T, greaseable and rotatable (in 30 deg increments) kit: 267XDFJPM5GH

In WaGu's trusty Document Library, you can:
click here for Chelsea PTO Documentation, and
click here for Quality Control Corp (QCC) Pump Documentation.