Deutz WP6C/WP4C Series Marine Diesel Engine Use and Maintenance Manual
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4.1.3 Add the fuel
(1) The diesel fuel should meet the related regulations (refer to 2.2).
(2) Pay attention to the cleanliness of the diesel fuel, and store the diesel fuel still for above 72h
before adding. Add the diesel fuel into the fuel tank through the internal filter screen.
Note: Check the diesel fuel level every time before starting the diesel engine.
4.1.4 Air bleeding of fuel system (Refer to figure 4-2)
(1) Unscrew the fuel screw 1 at the outlet of fuel delivery
pump for half a turn. Operate the hand pump 2 of the fuel
delivery pump 3 until the diesel fuel emits out and then
tighten the fuel screw.
(2) Unscrew the air bleed screw 4 on the fuel filter 5. Operate
the hand pump of the fuel delivery pump until the diesel
fuel emits out and then tighten the air bleed screw.
(3) Unscrew the air bleed screw 6 on the fuel injection pump
7. Operate the hand pump of the fuel delivery pump until
the diesel fuel emits out and then tighten the air bleed
screw.
(4) Continue to operate the hand pump, check the fuel line for leakage, and then tighten the hand
pump.
4.1.5 Add the coolant
The coolant is prepared from softened cleaning water and anticorrosion agent or antifreeze, strictly
conform to the regulations of additive manufacturer during preparation (refer to 2.3).
Add the coolant from the water filler of the radiator or the heat exchanger, and bleed the air from
the cooling circulation system.
Note: Frequent water adding and changing will generate scales in the system. Repair the
leakages of the cooling system as soon as possible. Add softened cleaning water as much as
possible and try to avoid frequent changing of coolant. The coolant drained from the water
tank can be reused after being filtered by fabric and fine screen.
Check the coolant level every time before starting the diesel engine.
4.1.6 Battery charging
Please refer to the battery instruction manual.
Note: The gases generated during charging are explosive. No smoking is allowed around the
battery, and the battery must be kept away from any naked flame and spark. There is strong
corrosive acid in the battery, please flush with a large amount of fresh water if the acid is
splashed into the eyes or on the skin.
Operation sequence for charging:
(1) Open the seal cover.
(2) Add the battery sulfuric acid from the filler to the marked position.
(3) Fasten the seal cap.
(4) Apply antirust grease on the battery electrodes.
(5) Connect the terminal and the electrodes, Connect the positive electrode firstly.
Figure 4-2 Air bleeding of fuel system