FAW Jiefang Automotive 485, Operation & Maintenance Manual, Page: 39 / 57

branch leads to camshaft bearing, and then to cylinder cover, to lubricate rocker arm bearing; other
branch leads to idle-gear bearing, passes to timing gear chamber branch oil-passage, and then to
the timing gear seat bearing of fuel-injection pump.
1-Crankcase sump 2-Engine-oil collector 3-Assembly of piston and connecting rod and
cylinder jacket
4-Engine-oil pump 5-Driving gear of engine-oil pump 6-Engine-oil filter
7-Gearing system 8-Engine-oil pressure gauge 9-Valve rocker arm
10-Valve push-rod, valve tappet and valve tappet hole of engine body
11-Valve rocker shaft 12-Valve and valve guide 13-Camshaft and bush
14-Oil-passages in engine body 15-Crankshaft and bearing
Fig. 14 Lubricating system schematic diagram
1. Engine-oil pump
The engine-oil pump is of rotor type. The rotor inside the pump is fixed on shaft with pin(s).
The gear of the engine-oil pump is driven by the driving gear of engine-oil pump on the crankshaft.
On the engine-oil pump body, is fitted pressure-limiting valve, which can regulate the flow-rate
and oil-pressure. On the cover of engine-oil pump is cast oil-in/-out hole, which connects to
cylinder body. The pump body and cover are fixed by bolts to the cylinder body. During operation,
when engine-oil temperature is 80
℃
, engine-oil pressure is 200
～
400 kPa (2
～
4 kgf/cm2).
Lowest pressure at idle should be no lower than 98 kPa (1 kgf/cm2).
2. Engine-oil filter
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