Model 2120 Tractor TM-4252 (Dec-70) General Information 10 Separating Assemblies 25-9 Move selector lever in position "L" (load control) so that the control linkage roller slides along the cam of the control arm when removing the rockshaft. Move selector lever in position "L" so that the control linkage with roller can be slid over the cam. Lift rockshaft on transmission case, using a suitable hoist. Attach engine lifting eye No. JD 244-2 to top of rockshaft housing. If equipped: connect oil return line 2 (fig. 9) of selective control valve to rockshaft housing. Remove rockshaft attaching screws (see arrows in fig. 9). Lift rockshaft assembly off transmission case by means of a hoist.
Connect lines to quick couplers. Take care not to damage two rear harnesses. Tighten rockshaft attaching screws to the specified torque. NOTE: After removing rockshaft, cover transmission case to prevent foreign particles from falling into the transmission. Connect cable of starter safety switch. Connect both rear wire harnesses to rockshaft. Install transmission shield on transmission case. INSTALLATION Attach lift links to lift arms. Install operator's seat. Use a new gasket between transmission case and rockshaft. Make sure dowels in transmission case and seal ring of oil inlet passage are installed. For adjustment of rockshaft see section 70, group 20.
Front support to engine, cap screws ................ 170 ft.lbs. 23,5 mkg CAUTION: Tighten ground strap to negative (-) poles of batteries. Hydraulic pump drive shaft, cap screw ............... 32 ft.lbs. 4.4 mkg TORQUES FOR HARDWARE Clutch housing to engine, cap screws ............... 170 ft.lbs. 23.5 mkg Oil pan to clutch housing, cap screws ............... 170 ft.lbs. 23.5 mkg Drag link to bell crank or steering arm, castellated nut* 55 ft.lbs. 7.7 mkg Clutch housing to transmission, cap screws ............. 85 ft.lbs. 11.7 mkg Securing bracket, hydraulic lines to clutch housing, cap screw 32 ft.lbs. 4.5 mkg Final drive housings to transmission case, cap screws 85 ft.lbs.
11.7 mkg Roll-over guard to final drive housings, . securing bracket, cap screws 94 ft.lbs. 13 mkg * NOTE: If cotter pin cannot be inserted when tightening to the specified torque, turn nut to next slot and secure with cotter pin. Printed in Germany