How to Disassemble Doosan DA30-5 Articulated Dump Truck Engine

 This article mainly introduces how to disassemble the Doosan DA30-5 Articulated Dump Truck engine assembly

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Place the dump truck on level ground and apply parking brake

Apply articulation lock.

Turn off main switch in battery case.

Raise the dump body and lock it with the safety support.

Raise the tiltable cab and lock it with the safety support

Drain engine coolant

Look in OPERATION & MAINTENANCE MANUAL chapter 2 for instructions.

 

 

WARNING

Never turn off battery main switch when engine is running

Never turn off battery mainSwitch when ignition is on

Leave battery main switch on for atleast 5 minutes after engine has completely stopped

 

 

 Place wheel chocks to the front wheel

 

Take away the cab bolt, left and right hand side.

M46 mm

Bolt torque: 277Nm

Take away the cab bolt, left and right hand side.

  

Turn the direction valve on the

pump in lifting up position.

 

With the handle, pump and raise the cab.

    

 Figure 4                                                 Figure 5

Left side:

1.

Disassemble the cab pump unit from the air filter stand. 2.

Remove the water hose from the pipe socket. 3.

Remove the  fuel hoses (3 pcs).

 

 

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Right side:

1.

Unscrew the hose clamps and remove the pipe bend,

filter - turbo

2.

Disconnect the oil hose from engine brake cylinder and bracket disassemble the other end at left side on the magnetic valve

3.

Hook up the filter stand in lifting device.

4.

Screw off the fastening bolt for filter stand,

left and right hand side

5.

Disassemble outlet pipe bend from turbo

6.

Unmount hoses attached to cooling water expansion tank 7.

Disconnect the exhaust pipe from the turbo pipe bend.

                     

                

Disasssemble the cable to the Air filter sensor and cable to the sensor for the cooling water expansion tank (black arrows).

 

 

 

                                                                                        

  

Slack the transmission belt.

Detach the Air Cond. compressor  with the hoses on, from the

engine. Check that all of the clamps are undone.

Place the Air condition compressor on the left side while the en-

gineis dismounted.

 

 

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Disconnect the hose from the termostat housing and

the pipe between the air cooler and engine air inlet.

Disconnect bracket for the air pipe and bracket between engine

and fan bracket

 

Disconnect the cables between starter motor and the frame

 

 

Disconnect contact on the dynamo.

 

Remove the cover and disconnect the electrical contact from the

engine ECU -S6 control unit

Unwind wires from engine to frame

 

Drive shaft

Remove safety archer.

Remove driveshaft between transmission and engine coupling,

1       Assembly torque:  114 Nm

2       Assembly torque:  141 Nm

3       Assembly torque:  141 Nm

Front- Left and right hand side, disassemble  screw on the engine

mounting bracket.

Assembly torque:  560 Nm  (M20 10.9)

 

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1

Disassemble the hose clamp bracket.

2

Unscrew the engine bracket bolt left and right hand side.

Note: Use bracket 529047 & 802645 on LHS on reassembly

Assembly torque: 560 Nm  (M20 10.9)

Remove clamps and dissasemble hoses connected to hydraulic block (red arrows)

 

Disassemble front brake oil cooler hose from the brake cooler circulate pump.