3-5.TM 5-3805-262-10MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION17. PARKING BRAKE DOES NOT HOLDStep 1.Start and operate engine at 1000 rpm until AIR PRESS gage pointerindicates in green area.Push in and momentarily hold in knob of parking brake control.Release parking brake control knob.Check that parking brake control knob stays in and parking brake isreleased.a. If parking brake control knob does not stay in or parking brakedoes not release, notify organizational maintenance (parkingbrake control must be removed and repaired).Step 2.b. If parkingleased, gobrake control knob stays in and parking brake is re-to step 2 below.Turn off engine.Depress brake treadle valve and declutch treadle valve until AIRPRESS gage pointer is approximately 1/4 inch into red zone.Check that parking brake control knob comes out and parking brakeengages.a. If parking brake valve knob does not come out or parking brakedoes not engage, notify organizational maintenance (parkingbrake control must be removed and repaired).b. If parking brake valve knob came out and parking brake engaged,no further action is required.3-29
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