D399, G399, D398, G398, D379, G379 ENGINES Caterpillar


Fuel Injection Equipment

Usage:



Pump timing (before top center):

D399 Engine ... 14°

D398 and D379 Engines ... 12°

(1) Torque for retaining bolt ... 27-37 lb. ft.(3,7-5,1 mkg)

(2) Length of new pump plunger ... 2.9831-2.9837 in.(75,771-75,787 mm)

Minimum permissible plunger length ... 2.9781 in.(75,644 mm)

(3) Dimension of lifter setting:

On Engine (piston at top center):

D399 Engine ... 2.076-2.080 in.(52,73-72,83 mm)

D398 and D379 Engines ... 2.088-2.092 in.(53,04-53,14 mm)

Off Engine ... 2.156-2.157 in.(54,76-54,79 mm)

(4) Diameter of new fuel rack ... .609-.610 in.(15,47-15,49 mm)

Bore in rack bearing ... .6114-.6130 in.(15,53-15,57 mm)

Maximum permissible clearance between bearing and rack ... .006 in.(0,15 mm)

(5) Bore in camshaft bearings ... 2.445-2.446 in.(62,10-62,13 mm)

Diameter of camshaft bearing journal ... 2.442-2.443 in.(62,027-62,052 mm)

Maximum permissible clearance between bearing and shaft ... .006 in.(0,15 mm)

(6) Torque for glow plug ... 96-144 lb. in.(111,0-166,0 cm.kg)

(7) Torque for fuel line nut ... 25-35 lb. ft.(3,5-4,8 mkg)

(8) Torque for nozzle retaining nut ... 100-110 lb. ft.(13,8-15,2 mkg)

(9) Body

(10) Nozzle finger tight in body.

(11) Torque for precombustion chamber (Apply 9M3710 Anti-Seize Compound on threads) ... 225 ± 15 lb. ft.(31,1 ± 2,1 mkg)

Caterpillar Information System:

D399, G399, D398, G398, D379, G379 ENGINES General Instructions
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