Changing Lubricating Oil And Oil Filter

Below is the detailed information of changing lubricating oil and oil filter for Shangchai W series diesel engines. The content includes steps to change lubricating oil and oil filter, changing fuel filter, priming fuel system and general knowledge of water separatior.

I. Changing Lubricating Oil And Oil Filter

Warning: Be careful when changing lubricating oil and oil filter because skin contact with the hot oil or hot engine surface can cause scald.

(1) Don't stop the engine until the temperature of the coolant reaches 60℃, then remove the oil drain plug. scrap the washer and drain the oil.

Caution: Do not drain lube oil when the engine is in cold state at which foreign particles has deposited and attached to the bottom of the oil pan, and will not drain with the oil. When the lube oil is warm, foreign particles suspend in it and can easily drain with it.

(2) Clean the installation surface of the oil drain plug on the oil pan. Install the oil drain plug with a new washer and tighten it to 200±20 N-m.

(3) Clean the outside surface of the oil filter. Remove the oil filter with tool and scrap it. There are three oil filters on the engine and all three filters should be replaced at the same time.

(4) Clean the filter head and its seal surface. There should be no old O-ring left.

(5) Before installing a new oil filter, fill it with clean oil from the 8 peripheral holes. The oil level should be 3 -15 mm below the threaded hole. Apply a light film of Vaseline or dean lubricating oil to the O-ring on the new filter to form a lubricating film,

Caution: Do not add oil from the central! hole of the filter.

(6) Turn the filter by hand until the O-ring contacts the sealed surface of the filter head, and further tighten it to 45 ±5 N-m or 3/4 turn to one turn with tool.

(7) Open the filler cap, and fill the engine with clean engine oil until the oil level is near the upper mark (high level) in the oil dipstick. The capacity of the oil pan is 75 L.

(8) Start the engine and keep it running at idle, and then check the oil filter and drain plug for oil leak.

(9) Shut off the engine, wait for about 15 minutes to provide enough time for the oil to flow back to the oil pan, and check the level. If required, add engine oil until it is near the upper mark (FULL) in the oil dipstick.

(10) Install the filler cap and tighten it until you feel suitable.

II. Changing fuel filter

(1) Be sure to shut the engine down.

Note: Do not replace the fuel filter cartridge when the diesel engine running.

(2) Clean the outside surface of the oil fitter on the left and remove the all filter with tool and scrap it.

(3) Clean the filter head and its seal face of, and there should be no old O ring left.

(4) Before installing a new fuel filter, fill it with clean fuel from the 8 peripheral holes. The fuel level should be 3-15 mm below the threaded hole. Apply a light film of Vaseline or clean engine oil to the O-ring on the new filter to from a lubricating film.

Caution: Do not add fuel from the central hole of the filter.

(5) Turn the filter with hand until the O-ring contacts the sealed surface of the filter head, and further tighten it to 45 ±5 N*m or 3/4 turn to one turn with tool.

III. Priming fuel system

If the engine has not been used for a long time or fuel filter is changed, air will enter the fuel system. It is required to prime the fuel system as per following steps:

(1) Loosen the fuel outlet pipe screw on the fuel filter or the fuel return pipe screw on the fuel pump.

(2) Prime the priming pump until there is no bubble visible in the fuel that outflows from the screw.

(3) Tighten the screw.

Caution: Priming the fuel system is necessary if air enters the fuel pipeline due to untimely fuel supplement or there is air in the fuel system due to other reasons.

IV. Water separator

The fuel filter have a function of water and fuel separation. The water drain interval depends on the quality of the fuel used. The better quality a fuel is, the longer period of water drain is. Performance of water drain must be done after the engine has been stopped because the pressure at the drain is quite high. Loosen the drain valves and drain the water and sediment in the filters until clean fuel overflows and then tighten the valves with hand to a proper degree.