TM 10-1670-296-20&P                                                    0006 00 0006 00-8 Table 2.  Preventive Maintenance Checks and Services – continued B – Before D – During A – After INTERVAL ITEM NO. B D A ITEM TO BE CHECKED   OR SERVICED EQUIPMENT NOT READY/ AVAILABLE IF: 12 Timer Delay Assembly.   Inspect timer assembly for bends, cracks, burrs, rough areas, and foreign material.   Check if timer activates at the appropriate time and if stem rotates freely in mounting block.  Ensure that keys retract at the end of timing sequence.   Timer assembly has bends, cracks, burrs, or rough areas or foreign material is present.   Timer does not activate at the appropriate time or stem does not rotate freely in mounting block.  Keys do not retract at the end of time sequence. 13 Lower Link Suspension.   Inspect link for bends, breaks, cracks, burrs, and rough areas.   Check for stripped or damaged threads. Link has bends, breaks, cracks.  Surfaces have burrs or rough areas.  Threads are stripped or damaged.