. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . should then be run on the wedge,the blocking removed from the front and back drivingboxes, the middle driver run down, and the back driverrun on a wedge, and the block removed from the mid-dle driving box. The engine is then ready to proceed. Middle Spring. If the middle spring is broken onan engine with underhung spring rigging, the backdriver should be run on a wedge, a block placed ontop of the middle driving box, the back driver runoff the wedge, the middle
. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . should then be run on the wedge,the blocking removed from the front and back drivingboxes, the middle driver run down, and the back driverrun on a wedge, and the block removed from the mid-dle driving box. The engine is then ready to proceed. Middle Spring. If the middle spring is broken onan engine with underhung spring rigging, the backdriver should be run on a wedge, a block placed ontop of the middle driving box, the back driver runoff the wedge, the middle driver run on a wedge andthe forward end of the back equalizer 1 chained, orblocking placed between the safety hanger and theequalizer 2. If there is no safety hanger or chain, ablock should be placed between the forward end ofthe back spring 3 and the lower rail of the frame. 222 BREAKDOWNS. The back end of the forward equalizer 4 should alsobe chained up, or blocking placed between the safetyhanger and equalizer 5, or the back end of spring 6 andthe lower rail of the frame (Plate 101), and the middledriver run off the PLATE 101. Back Equalizer. If the back equalizer is broken atthe fulcrum on an engine with underhung spring rig-ging, the back driver should be run on a wedge, ablock placed over the middle driving box, the backdriver run off the wedge and the middle driver runon a wedge, relieving the back spring. A block shouldthen be placed between the forward end of the backspring and the lower rail of the frame, and anotherblock placed on top of the back driving box toassist in elevating, eliminating the necessity of runningthe back driver on a high wedge. The middle drivershould then be run off the wedge, the back driver run ona wedge, blocking placed between the back end of themiddle spring and the lower rail of the frame, the blockremoved from the top of the middle driving box, theback driver run off the wedge, the middle driver run ona wedge, and the block remo
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