TM 10-3930-659-20 17-13.    CONVEYORIZED FORK ATTACHMENTS MAINTENANCE (Con't). 3. Inspect pins for bends.  Replace bent pins. 4. Inspect conveyor frame for distortion.  Replace conveyor frame if distorted. d. ASSEMBLY NOTE • Both   conveyorized   fork   attachments   are   assembled   the same  way. One conveyorized fork attachment is illustrated. • Perform step 1 to Install each of 20 bearing units. 1. Install bearing unit (24) and two spacers (23) on conveyor frame (7) with pin (22) and retaining ring (25). 2. Install two bearing units (20) and four spacers (19) on conveyor frame (7) with two pins (18) and retaining rings (21) TA707648 17-49