THIS WORK PACKAGE COVERS:
Before Run-in, Run-in, and After Run-in
Expendable and Durable Items:
General mechanic's tool kit (item 121, WP 0176)
Lubricating oil, engine (item 21, WP 0173)
Spacer sleeve (2) (item 109, WP 0176)
Torque wrench, 500-2500 inch-pounds
Track Vehicle Repairer (2) 63H10
Mandatory Replacement Parts:
Engine coupled to dynamometer or water brake,
Lock washers (8) (item 94, WP 0175)
or installed in vehicle.
Cotter pin (2) (item 53, WP 0175)
This work package describes run-in schedules for overhauled or rebuilt engines prior to being
placed in service. Engine run-in is performed after rebuild to assist in breaking in new parts,
to detect faulty assembly, to check for oil leaks, and to determine whether an engine will
operate satisfactorily when installed in a vehicle.
Engine leak test should be done before run-in. Refer to WP 0038.
1. Couple engine to suitable load.
a. The load may be a water brake or electric dynamometer.
2. Pre-lubricate engine by forcing engine oil under pressure into lubrication system.
Pre-lubrication will ensure adequate lubrication to engine parts until
oil is circulated under pressure from engine oil pump. When pre-
lubrication equipment is not available, fill crankcase with lubricating
engine oil (item 21, WP 0173). Using engine starter, crank engine
until pressure gauge begins to move while holding fuel shutoff in the
3. Connect external source of fuel supply to engine.
4. Connect same type air cleaners that are used with engine when installed in vehicle.
Air intake must be located so that only cool, fresh air will be inducted
into engine. A means must be provided for conducting exhaust gases
and cooling air from engine to avoid re-circulation through engine
cooling fans. Failure to do so may result in engine damage.
WP 0044 00-1