TM 9-2520-246-34 Section II. REPAIR (MODEL WN-7-28) 5-5. General. Discard the gasket. a. This section contains disassembly and assembly instructions for power takeoff model WN-7-28. b. Cleaning and repair procedures are contained in chapter 2, section III of this manual. c. Use a separate container for the parts of each subassembly. If more than one power takeoff is being rebuilt at the same time, use marked, separate containers for each power takeoff to avoid getting individual parts mixed up. d. Power takeoff disassembly and assembly are accomplished by the following logical step-by-step procedures. The assembly procedures are provided only where special attention to a part or an assembly is required. Refer to paragraph 5-7 for the sequence of assembly operations. Assembly of the power takeoff is the exact opposite of disassembly, unless otherwise specified. 5-6. Disassembly and Assembly (Model WN-7- 28). a. Power Takeoff Cover, Poppet Retainer, and Poppet Spring and Ball. (1) Remove the six capscrews and star washers securing the power takeoff cover to the carrier. (See fig. 5-3.) Remove the cover and the cover gasket. Figure 5-3. Removal of Power Takeoff Cover, Poppet Retainer, Poppet Spring and Ball. (2) Remove the poppet retainer (fig. 5-3). Turn the power takeoff on the side and remove the poppet spring and ball. NOTE During assembly of the power takeoff, always install a new cover gasket. b. Shifter Shaft and Shifter Fork. (1) Remove the safety wire and fork setscrew from the shifter fork. (See fig. 5-4.) (2) Remove the shaft capscrew and flatwashers from the end of the shifter shaft. (See fig. 5-4.) Pull the shifter shaft rearward through the shifter fork. Remove the shifter fork and continue to slide the shifter shaft from the power takeoff case. NOTE During assembly, install the shifter fork with the screw hole on the rear side. c. Input Gearshaft and Input Gear. (1) Remove the input gearshaft cotter pin from the input gearshaft. (See fig. 5-5.) Using a soft driftpin, drive the input gearshaft from the case. Figure 5-4. Removal of Shifter Shaft and Shifter Fork. 5-3