Here ya go Mike! I just noticed this. Not all of the Mack engines had the same size pumps. I have numerous slides of the macks, and quite a few have the smaller 1000 gpm pumps. Can anymore verify this for sure?
![[Image: PittsburghEngine22.jpg]](http://img.photobucket.com/albums/v112/Shoop/PittsburghEngine22.jpg)
Engine 22
1974 Mack 1000/500
John Schmidt Photo
![[Image: PittsburghEngine30.jpg]](http://img.photobucket.com/albums/v112/Shoop/PittsburghEngine30.jpg)
Engine 30
1972 Mack 1250/500
Tom Bair Photo
Originally assigned to E29
![[Image: PittsburghEngine32MackR.jpg]](http://img.photobucket.com/albums/v112/Shoop/PittsburghEngine32MackR.jpg)
Engine 32
1973 Mack 1250/500
Tom Bair Photo
![[Image: PittsburghEngine51.jpg]](http://img.photobucket.com/albums/v112/Shoop/PittsburghEngine51.jpg)
Engine 51
1972 Mack 1000/500
Tom Bair Photo
![[Image: PittsburghEngine22.jpg]](http://img.photobucket.com/albums/v112/Shoop/PittsburghEngine22.jpg)
Engine 22
1974 Mack 1000/500
John Schmidt Photo
![[Image: PittsburghEngine30.jpg]](http://img.photobucket.com/albums/v112/Shoop/PittsburghEngine30.jpg)
Engine 30
1972 Mack 1250/500
Tom Bair Photo
Originally assigned to E29
![[Image: PittsburghEngine32MackR.jpg]](http://img.photobucket.com/albums/v112/Shoop/PittsburghEngine32MackR.jpg)
Engine 32
1973 Mack 1250/500
Tom Bair Photo
![[Image: PittsburghEngine51.jpg]](http://img.photobucket.com/albums/v112/Shoop/PittsburghEngine51.jpg)
Engine 51
1972 Mack 1000/500
Tom Bair Photo