PACCAR PX-7
Horsepower See the EPA label on top of the valve
cover, towards the rear of the engine.
Firing Order 1-5-3-6-2-4
Crankshaft Rotation (viewed from front of engine) Clockwise
Displacement 409 CID (6.7 liters)
Bore and Stroke 4.21 in. × 4.88 in. (107 mm × 124 mm)
Approximate dry weight (without standard accessories) 1,151 lb (522 kg)
Idle Speed Minimum 700 rpm to maximum 900 rpm
Maximum overspeed capability (15 seconds maximum) 4,200 rpm
Minimum ambient temperature for unaided cold start -10°F (-12.2°C)
Typical engine cranking speed 120 rpm
Overhead adjustment Intake valve adjustment 0.010 in. (0.254 mm)
Exhaust valve adjustment 0.026 in. (0.660 mm)
Filter Specifications
PACCAR is not responsible for problems
caused by non-genuine filters that do not
meet PACCAR performance or durability
requirements.
Contact your local PACCAR authorized
repair location for specific part numbers.
Fleetguard filters are standard on new
PACCAR engines. PACCAR recommends
their use.
Fleetguard products meet all PACCAR test
standards to provide the quality filtration
ENGINE MAINTENANCE - Engine Specifications
Y53-1183-1G1 (05/19) 39
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