2026 Mack GR64B

Category, Trucks. Duty cycle profile, 25 miles and new condition point to delivery-only use, not a working history. Rolloff application centers on chassis stability, PTO driven hydraulics, and repeated stop and go cycles, so early inspection should focus on PTO engagement quality, pump noise, valve response, and any seepage at hose ends and cylinder glands after the first heat cycles. Powertrain documentation, engine, transmission, axle ratio, and any PTO or wet kit details are not provided here, so the practical evaluation hinges on verifying build spec from the VIN and confirming the dash configuration matches the intended hoist controls. Cab and chassis checks should include cold start behavior, regen status indicators, driveline angles at ride height, and that the interlocks for hoist operation, parking brake, and transmission inhibit function correctly. Frame rails, hoist subframe tie-ins, and rear crossmember area are the make or break points on rolloff setups, even on low-mile trucks. Hydraulic tank mounts, pump bracket alignment, and hose routing should show clean clamp points with no rub-through risk. Electrical harnessing at the rear, work light wiring, and any body control module connections should be secured and loomed, with attention to connector sealing and strain relief. Identification, serial number 1M2GR2GC8TM056227 and stock number 71583 are the trace points for spec verification, warranty start, and service campaign lookup. ECM hours and calibration data are not listed, so a scan tool pull is recommended to document hours, fault history, aftertreatment status, and PTO parameters before the truck enters daily rolloff service.