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 Post subject: ASR - Reading T-1 2100 2016 - Throttle Part II - Sept 17
PostPosted: Sun Sep 18, 2016 11:28 pm 

Joined: Sat Aug 21, 2004 10:50 pm
Posts: 417
The following stalwart volunteers attended Saturday’s work session while 765 was masquerading as 767 in grand historic fashion barely 10 miles south of the 2100:
● Gordon Hartschuh
● Tom Gross
● Tiffany Saultz
● Perry Krzyzaniak
● Rick Engle

It was an intense purposeful day at the roundhouse and the rewards were quite gratifying. The throttle body was still our primary concern and immediate efforts were placed on the throttle rebuild and getting it back together. A more coarse lapping compound was ordered and volunteers spent all day seating in the valves. It wasn’t until after lunch that finer compounds were used to start dressing up the valves.

A limited number of people could work on the throttle at the same time so the remaining volunteers started on new tasks. The steam chest water drains were repaired and reinstalled. Air compressor air filters were hung into position. Insulation was placed in the air intakes of the ash pan to block off cold air flow once a heater is placed in the firebox for the upcoming hydro. The big task was pressure testing of the steam lubricator. All the oil lines were disconnected and each pump in the lubricator was individually tested to 400-600 psi. All lines were reconnected and are ready for service.

Though it was getting late, the throttle valve lapping was on the last cycle of 220 grit compound and the seats were looking very smooth and shiney. Everyone wanted to see the throttle completed so everyone stayed late to see it through to completion. With the lapping complete the valves were seated into the cam lobes. It took a little effort to find the right order but they all locked into place and properly cycled open and closed several times. The valve head studs had previously been chased and cleaned so the valve body heads were put into place and new nuts were installed and tightened down. The throttle linkage was connected to the throttle lever in the cab and tested and was found to move very smoothly. By this time, it was after 7 pm, so it was well past time to start cleaning up.

Many thanks goes out to today’s volunteers for the extra effort in completing all the tasks that were started. Everyone went above and beyond today and are to be commended for their dedication to the project.


Rob Gardner
On behalf of Gordon Hartschuh, ASR Roundhouse Foreman

File comment: Throttle valve covers reinstalled
Reinstalling Throttle Valve Covers (2).jpg
Reinstalling Throttle Valve Covers (2).jpg [ 17.93 KiB | Viewed 1121 times ]
File comment: Lapped throttle valve seat
Lapped Throttle Valve Seat (2).jpg
Lapped Throttle Valve Seat (2).jpg [ 13.22 KiB | Viewed 1121 times ]
File comment: Lapping throttle valves
Lapping Throttel Valve Seats (2).jpg
Lapping Throttel Valve Seats (2).jpg [ 17.21 KiB | Viewed 1121 times ]
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