xm757 engine access

[cranetruck]

Been driving the 757 a bit lately and have had problems with the throttle sometimes sticking. On my latest drive, the governor mechanism locked up in "full throttle" and I had a lot of fun driving it about 2 miles back home, braking and shifting the automatic transmission within permissible road speed ranges. Hated to shut it down with the rpm at 2800, but there was no choice (turbo oiling wise).

In the past, the procedure would have been to lift the cab for access to the IP. Without a crane, I decided to tilt the cab just enough to reach the pump and it turned out to be a lot less time consuming anyway. Pictures attached.

Found a piece of a broken plunger return spring, which had messed with the fulcrum mechanism. The spring was broken along with a missing spring keeper part from day one of me owning the truck.

 

[cranetruck]

Of course the images are out of order after uploading... The spring piece is shown below.

 

[paradeduty]

Wow - good thing it did not cause any appreciable damage (hopefully)! Sure glad (as probably are you) that you know what you are doing with the IP's. Good job getting it home. One time years ago I lost the accelerator cable on a cab forward Oshkosh firetruck about 5 miles from home. Fell back to idle, so not you're WOT issue, but it was "fun" coaxing the 8V92 back home at idle in a 35K truck (55' Snorkel basket truck) using "selective shifting" of the Allison. Have a feeling I know what you were doing to keep busy! With that LVS "tuned up" at the factory, it was probably fine. Maybe not working it hard (high RPM, but not beating on it) the turbo may not have been too, too hot. Bottom line, other than shutting it down where it was, there was not much else you could do about the turbo at that point.

 

[rmgill]

Bjorn , did you sell the deuce?

 

[gimpyrobb]

I have IP parts, let me know if I need to dig some parts out for you.

 

[cranetruck]

Ryan, yes it was sold last year, pressure from above...

Gimp, thanks no problem with parts, fortunately, just some FO without damage. The 465-2 IP is different in some ways, it uses a "torque link" to reduce shift shock during automatic shifting, a part not found in any other multifuel IP.

Truck is running good again.