10 General Information 25-8 Separating Assemblies Model 2120 Tractor TM-4252 (Dec-70) Attach final drive to hoist. Remove final drive attaching screws. Separate final drive housing together with brake housing from transmission case, Withdraw housing evenly until final drive shaft gear is no longer in mesh with planetary gears of final drive. CAUTION: Take care that the brake housing does not fall down (DANGER OF ACCIDENTS). On tractors with selective control valve(s): Attach control valves with bracket* or manifold** onto the right hand final drive housing. Connect hydraulic lines. Connect brake lines and bleed brakes, as explained in section 60, group 15.
Install rear fenders and roll-over guard. Tighten hex. nuts to specified torque. INSTALLATION NOTE: If the brake disk and the "floating" facing were removed, install bonded two-layer facing so that the brass-interwoven upper layer faces the brake surface of the transmission case. Position new gaskets between final drive housing and brake housing as well as between transmission case and brake housing. Attach final drive to transmission case by means of a suitable hoist. Make sure final drive shaft gear engages with planetary gears and that the dowels are guided into their respective bores. Connect lines of wiring harnesses to connectors. Connect cable to brake warning switch.
Install rear wheels and tighten to the specified torque. CAUTION: Tighten ground strap to negative (-) poles of batteries. Tighten final drive attaching screws to the specified torque. REMOVAL AND INSTALLATION OF ROCKSHAFT REMOVAL IMPORTANT: Work on the hydraulic system requires extreme care and cleanliness. Minute dirt or foreign particles, scratches, nicks or burrs may put the hydraulic system out of function. Before removing the rockshaft, check hydraulic system for leaks. For safety, disconnect ground cable from batteries. Remove transmission shield. Disconnect line 1 (fig. 9) of starter safety switch. Remove operator's seat. Disconnect both lift links at lift arms.
Disconnect oil return line (see 2, fig. 9) of selective control valve (if equipped) at elbow on rockshaft. Disconnect lines of rear quick couplers (if equipped) at selective control valves. Free both rear wiring harnesses. L5153 Fig. 9 Rockshaft, Installed 1 Line of safety starter switch 2 Oil return line * On earlier tractors ** On later tractors Printed in Germany