Ordnance Maintenance: 155-MM Gun and Carriage M1 and M1A1

155-mm gun recoil air filling tube Assemble Belleville spring Bogie Lifting bore bottom carriage Breech bushing connection CONTROL ROD Cotter pins counterrecoil piston cradle lock Disassemble Dismounting drain plug drain valve release drill press Drum Brake equilibrator locks equilibrator valve FIGURE filling and drain filling valve firing mechanism firing pin FITTING-CLDXIA floating piston Gage reading GROOVE IN CONTROL GUN AND CARRIAGE gun M1 gun recoil mechanism gutta-percha inches jack kg per sq leakage M1 AND M1A1 MAINTENANCE RA PD manometer test nitrogen pressure obturator spindle oil index oil pump oil reserve ordnance maintenance personnel ORDNANCE MAINTENANCE RA packing pintle bolt primer rear end rear head recoil cylinder recoil rod stuffing Recoil Slides RECUPERATOR CYLINDER Remove the filling replenisher cylinder replenisher piston guide reserve oil rod stuffing box roller bearing spring sq cm star-gaging straightedge Temperature Degrees threads top carriage trunnion unscrewed valve opener WASHER