TM 9-2320-303-10 Table 2-1.  Preventive Maintenance Checks and Services (PMCS) for M915A4 (Con't). Location Item To Check/ Not Fully Mission Item No. Interval Service Procedure Capable If: 54 Weekly Brake Cham- NOTE bers Perform the following check at all axles. Check brake chamber service pushrod for showing    of    stroke    alert indicator (62). Stroke alert indicator is visible. REAR AND RIGHT SIDE 55 Weekly Pintle Hook Check pintle hook (64) for looseness, damaged locking    mechanism,    and presence    of    cotter    pin. Lubricate at all four grease fittings (63) (Appendix     F),     if     pintle hook does not rotate freely by hand. 2-56