MONTHLY PMCS

Change engine oil and filter — drain fully, install new filter, refill with correct viscosity per temperature range; dispose of used oil properly

Service air cleaner — remove and clean or replace primary and safety filter elements per restriction indicator; inspect housing and ducting for cracks or loose clamps

Drain and inspect fuel filter/water separator — replace element if contaminated, discolored, or at service interval; inspect bowl for water or sediment

Check coolant concentration — must be 50/50 antifreeze/distilled water; test with refractometer; top off with correct mix only; inspect surge tank cap seal

Inspect all coolant hoses and clamps — squeeze hoses for soft spots, cracks, or swelling; tighten or replace any loose clamps; check for seepage at connections

Inspect engine mounts and powerpack retaining hardware — no cracks, loose bolts, or excessive movement; torque to spec if loose

Check engine exhaust system — inspect exhaust manifold, pipes, and outlet for cracks, leaks, or loose mounting; no carbon buildup blocking outlet

Inspect fuel lines and connections — check all fuel lines from tank to engine for chafing, cracks, or leaks; tighten fittings; replace damaged lines

Check transmission fluid level and condition — must be between MIN and MAX (engine warm, running); fluid should be red/pink, not dark or burnt; inspect for leaks at seals

Check final drive oil levels — both left and right; must be at fill plug level; inspect seals and gaskets for leaks; change oil per service schedule

Inspect steering differential — check for leaks at seals; verify no unusual noise during steering checks; inspect mounting hardware

Inspect all road wheels — check for cracks, missing bolts, or damaged rubber; torque wheel bolts to specification; replace any wheel with cracked hub or missing bolts

Inspect road wheel arms and torsion bars — check for cracks, bends, or loose mounting hardware; verify torsion bar end caps are secure

Check track tension — must be 3–5 inch sag measured at center of top run; adjust track adjuster if outside spec; inspect track pads for wear or missing pads

Inspect track pins and end connectors — check for loose or missing pins; verify end connector bolts are torqued; replace any cracked or bent connectors

Inspect idler wheel and sprocket — check for cracks, missing teeth on sprocket, and loose mounting bolts; verify idler wheel rotates freely without binding

Lubricate all suspension grease fittings — road wheel arms, idler arms, track adjuster, and all other fittings per lubrication order; use correct lubricant for temperature range

Check hydraulic oil level and condition — must be between MIN and MAX; inspect for contamination or milky appearance indicating water intrusion; inspect reservoir for leaks

Inspect all hydraulic lines and fittings — check for chafing, cracks, or seepage at all connections; replace any damaged lines; tighten loose fittings

Verify hydraulic system pressure — operate gun elevation and traverse through full range; check for sluggish response or unusual noise indicating low pressure or pump wear

Inspect and clean batteries — remove corrosion from terminals and tray; apply protective coating; check hold-down hardware; verify vent caps are in place

Load test batteries — each battery must maintain 9.6V under load for 15 seconds at 0°F rating; replace any battery that fails load test

Check alternator/generator output — must show charge voltage (27–29V DC); inspect drive belt condition and tension; replace belt if cracked or glazed

Inspect all electrical cables and connectors — check main power cables, slave receptacle, and all harness connectors for corrosion, chafing, or loose connections

Check NATO slave receptacle — cover in place; no corrosion on contacts; verify slave cable is on vehicle and serviceable

Inspect and lubricate turret ring — clean all debris and old lubricant from ring gear; apply fresh lubricant per lubrication order; verify smooth rotation with no binding

Check gun elevation and traverse — operate through full range of motion; no binding, jerking, or unusual noise; verify limit switches function correctly

Inspect main gun tube — check for bulges, cracks, or damage; inspect muzzle reference system (MRS) for damage or misalignment; clean bore if required

Inspect bore evacuator — check for cracks, damage, or loose mounting hardware; verify check valves are functional; no carbon buildup blocking ports

Inspect and function-check breech mechanism — clean and lubricate all components; verify breech opens and closes smoothly; check firing pin protrusion and condition

Check thermal sight (GPS/CITV) — clean all optics with lens tissue only; verify operation per operator checks; check mounting hardware for tightness

Inspect laser rangefinder — clean transmit and receive optics; verify operation per operator checks; check for damage to housing or mounting

Run fire control computer built-in test (BIT) — verify no fault codes; record any faults on 5988 for maintenance action

Check ammunition storage — all rounds properly secured in ready rack and hull storage; no loose, damaged, or improperly stored rounds; verify round count matches records

Inspect automatic fire suppression system (AFSS) — check Halon bottle pressure gauges (must be in green); inspect sensors, wiring, and control panel for damage or fault codes

Inspect portable fire extinguisher — pin in place; gauge in green; no damage to body or nozzle; verify it is properly mounted and accessible

Inspect NBC overpressure system (if equipped) — check filter condition and service date; verify blower operation and overpressure indicator function; inspect all seals

Inspect hull for cracks, damage, or loose armor panels — check weld seams on hull and turret; verify all access panels and hatches seal properly

Inspect tow hooks and lifting eyes — no cracks, deformation, or loose mounting bolts; verify tow cables are on vehicle and serviceable

Check all hatches and vision blocks — hatches open and close freely; latches function correctly; vision blocks clean and undamaged; replace any cracked vision blocks

Inspect smoke grenade launchers — no damage to tubes or wiring; verify firing circuits are functional; check that all tubes are clear of obstructions

Update vehicle records — annotate all faults found on 5988; update equipment log; verify all open faults from previous PMCS are closed or still annotated

Verify lubrication order (LO) is current and on vehicle — check LO service date; ensure all services due this period are completed and annotated