2-14. SPLINED NUT REPLACEMENT.
This paragraph describes the removal and installation of splined nuts. Two persons are required for this task.
1. Remove powerpack (refer to TM 9-2350-287-20-1). Remove splined nut attaching drivers seat and splined nut
attached to heating duct (refer to TM 9-2350-287-20-2). Remove drivers compartment bulkhead shield and
insulation (para 9-3).
2. From drivers compartment, use suitable hammer and punch to drive either insert from bulkhead into engine
Position new nut against engine side of hole. Position large steel washer against nut. Have assistant position large
steel washer and screw from drivers side of bulkhead.
Screw and nut for driver's seat splined nut must be 3/8-20. Screw and nut for drivers
heating duct splined nut must be 3/16-28.
Install nut on screw. Have assistant hold screw. Tighten nut to drive nut into fully nested position. Remove nut,
screw, and washers from bulkhead. Make sure splined nut is fully seated.
Screw in appropriate screw and remove it. Operation should be smooth.
Install drivers compartment bulkhead shield and insulation (para 9-3). Install drivers seat and drivers heating
duct (refer to TM 9-2350-287-20-2).
Install powerpack (refer to TM 9-2350-287-20-1).