John Deere约翰迪尔强鹿柴油机润滑系统的维修技术规范

John Deere约翰迪尔强鹿柴油机润滑系统的使用

A—Oil Pump J—Balancer Shaft Bushings S—Rocker Arm Shaft AA—Pressurized Oil

B—Oil Suction Line K—Crankshaft Drilled T—Turbocharger Oil Supply AB—Pressure-Free Oil

C—Oil Outlet Tube Cross-Passages Line AC—Remote Mount Filter

D—Oil Cooler Housing L—Main Bearing Bushings U—Turbocharger Drain Line Assembly

E—Coolant Passage Adapter M—Oil Passages V—Rocker Arms AD—Low-Mount Rear Vertical

F—Oil Filter N—Main Oil Gallery W—Machined Groove Oil Filter Assembly

G—Oil Filter Header/Adapter1 O—Connecting Rod Bearings X—Cross-Drillings AE—Low-Mount Front Vertical

H—Oil Fill Tube P—Piston Cooling Orifice Y—Oil Pressure Regulating Oil Filter Assembly

I—Oil Cooler Q—Camshaft Bushings Valve AF—High-Mount Vertical Oil

R—Piston Pin and Bushing Z—Oil Bypass Valve Filter Assembly

NOTE: Two-valve head engine shown. Lubrication of

four-valve head engine is similar.

The engine lubrication system consists of a positive

displacement gear-driven oil pump (A), full-flow oil filter

(F), oil cooler (I), oil pressure regulating valve (Y), and

an oil bypass valve (Z).

The oil pump pulls oil from the oil pan sump through a

strainer and a suction line (B). The pump forces oil

through the outlet tube (C) into a vertical drilling in the

cylinder block, and up to the oil cooler and filter. Oil

filters can be mounted on the engine in various

locations (AD—AF). A remote-mounted oil filter (AC) is

also optional. After flowing through the cooler and

filter, oil flows into the main oil gallery (N).

The main oil gallery runs the length of the cylinder

block and delivers oil to oil passages (M) that feed the

camshaft bushings (Q) and main bearing bushings (L).

The cross-drillings (X) intersect with those same oil

passages and feed oil to the balancer shaft bushings

(J).

From the main bearings, oil flows to the connecting rod

bearings (O) through drilled cross-passages (K) in the

crankshaft between the main journals and connecting

rod journals. Oil from the main bearing also supplies

oil to the piston cooling orifices (P).

Oil from the piston cooling orifices sprays on the

underside of the piston to keep the piston crown cool.

The oil spray also provides splash lubrication for the

piston pin and bushing (R) by splashing oil into a hole

drilled in the top end of the connecting rod.

At the rear of the cylinder block, oil flows from the rear

camshaft bushing (Q), up through the cylinder head,

and into the rocker arm shaft (S). Oil flows through the

rocker arm shaft and lubricates each of the rocker

arms (V). Oil drips from the rocker arms to lubricate

the adjusting screws, push rods, and camshaft

followers.

At the front of the cylinder block, oil flows from the oil

passage into a machined groove (W) in the front face

of the block. This groove connects with the upper idler

gear shaft to provide oil to the idler gear bushing. The

lower idler gear bushing is splash lubricated.

The turbocharger oil supply line (T) supplies oil to the

turbocharger from filtered side of oil filter adapter. Oil

returns from the turbocharger through the drain line

(U).