Clean radiator unit

AR20.20-G-3872B

Clean radiator unit

19.8.15

Engine

900.915/916, 902.923/924/935, 904.927/928, 906.935/955

Right side

1

Radiator grill

2

Engine radiator

3

Charge air cooler

Pfeil

Directing disc

Left side

4

Radiator grill

5

Additional radiator

6

Radiator grill

7

Oil cooler

8

Condenser

Pfeil

Directing disc

9

High pressure cleaner

10

Rotary switch for metering

11

On/Off switch

12

Combination probe (8 mm dia.)

13

High pressure probe (10 mm dia., a special item made for the Unimog engine radiator)

Picture A shows soiled radiator fins

Picture B shows cleaned radiator fins

Remove/install on the RH side



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

1

Remove radiator trim on the right side

2

Remove radiator grill (1) from engine radiator (2)

With CODE C47 (radiator grill at the rear)

 Installation: Replace nuts.

3

Pull out radiator intermediate grille between the engine radiator (2) and charge air cooler (3)

With CODE M74 (Clean-Fix radiator quick cleaning system)

4

Unfasten engine radiator (2) from charge air cooler (3) and swivel to the rear

Remove/install on the left side



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

5

Remove radiator trim on the left side

6

Remove radiator grill (4) from additional radiator (5)

ENGINE 902, 906

 Installation: Replace nuts.

7

Remove radiator grill (6) from oil cooler (7)

 Installation: Replace nuts.

8

Detach additional radiator (5) outside on the supporting frame of the condenser (8) and swivel to the rear

ENGINE 902, 906

9

Detach oil cooler (7) outside on the supporting frame of the condenser (8) and swivel to the rear

10

Pull out radiator intermediate grille between the fan cowl and condenser (8)

With CODE M74 (Clean-Fix radiator quick cleaning system)



Clean

11

Remove larger particles of dirt on the engine radiator (2), charge air cooler (3), additional radiator (5), oil cooler (7) and condenser (8)

 Risk of injury:
Wear protective clothing and safety glasses.
Only perform cleaning at a coolant temperature below 50°C. See also notes in the operator's manual.

12

Mount combination probe (12) for spraying the cleaning agent onto the spray tube of the high pressure cleaner

 Pay attention to manufacturer's operating instructions.

 All required components can be ordered on the internet at www.tunap.com.
The TUNAP combined and high pressure probe can also be used in combination with a Kärcher high pressure cleaner.
To do this it is necessary to have an adapter with a flexible probe extension.

 Part order no:
 High pressure cleaner TUNAP 1801
(Order no. 16 1801),
 Combination probe, 8 mm dia., length 85 cm
(Order no. 11 1803),
 High pressure probe, 10 mm dia., length 85 cm (Order No. 11 1890),
 Adapter for a Kärcher high pressure cleaner with a flexible probe extension (with Kärcher armature 2180DKOW-KÄR10)
(Order no. 11 1881),

13

Fill high pressure cleaner (9) with about 2 l of cleaner

 Observe the safety specifications of the manufacturer for handling cleaner.
Wear protective clothing, protective gloves and safety glasses.
Dispose of escaping cleaning solution in an environmentally acceptable manner.

14

Set rotary switch for metering (10) to the maximum setting

 This setting represents a mixing ratio of 1:20.
When using a Kärche high pressure cleaner the manufacturer's instructions must be observed to adjust the recommended metering.

15

Switch on ON/OFF switch (11)

16

Spray engine radiator (2), charge air cooler (3), additional radiator (5), oil cooler (7) and condenser (8) on the front and rear side with cleaner

 The direction of spraying of the combination probe (12) is opposite to that of the directing disc (arrow). Lead the combination probe (12) from the uppermost point on the engine radiator (2), charge air cooler (3), additional radiator (5), oil cooler (7) and condenser (8) downwards.
After every passage of the combination probe (12) lead about 5 cm outwards and lead from above downwards, in order to reach all locations. Allow cleaner to work for about 15 to 30 minutes.

17

Set rotary switch for metering (10) to zero

18

Switch off ON/OFF switch (11)

19

Mount the high pressure probe (13) for water flushing on the spray tube of the high pressure cleaner

 An optimal cleaning result can be obtained with the high pressure probe (13) specially designed for cleaning the Unimog cooling system.

20

Switch on ON/OFF switch (11)

21

Flush out engine radiator (2), charge air cooler (3), additional radiator (5), oil cooler (7) and condenser (8) on the front and rear side with water

 Only aim the water jet vertically to the radiator fins. Do not damage the radiator fins. Lead the combination probe (13) from the uppermost point on the engine radiator (2), charge air cooler (3), additional radiator (5), oil cooler (7) and condenser (8) downwards. After every passage of the combination probe (13), lead about 5 cm outwards and lead from above downwards, in order to reach all locations.

22

Switch off ON/OFF switch (11)

23

Blow out engine radiator (2), charge air cooler (3), additional radiator (5), oil cooler (7) and condenser (8) with compressed air

 Risk of injury:
Wear protective clothing and safety glasses.



Check

24

Check engine radiator (2), charge air cooler (3), additional radiator (5), oil cooler (7) and condenser (8) for dirt

 See picture A and picture B.

 Illuminate wetted area on the engine radiator (2), charge air cooler (3), additional radiator (5), oil cooler (7) and condenser (8). Repeat the cleaning and flushing process if necessary.

25

Install in the reverse order

26

Perform a test drive

27

Check cooling system for leaktightness

 Visual inspection.