TM   10-3930-643-20 INTRODUCTION. 1-9.   Equipment   Data. m. Hydraulic System. Type Features Hydraulic   Pump Type Capacity at   2500   Engine   rpm Hydraulic    Cylinders Tilt   Cylinder Part   number Quantity Bore Stroke Lift    Cylinder Part   number Quantity Bore Stroke Sideshift    Cylinder Part   number Quantity Sideshift    Cylinder Part   number Quantity Closed   center,   constant   pressure system.    Variable    displacement piston   pump   powers: Fork   controls A r t i c u l a t i on Steering .    Constant   pressure,   parallel- control   valve   circuit   provides immediate   implement   response l   Dual-level   pump   capacity   matches horsepower  use  to  system  needs .    Hydraulic   lock   valves   in   all implement   circuits   prevent c y l i n d e r    d r i ft Gear 27 GPM 1123794   (9) 1 5.5   inch 31.2   inch 1123857   (9) 1 8   inch 12  inch (S/N   2000   and   below) 1125529C1 1 (S/N  2001  and  up) 1173583  (9) 1 1-7