Remove/install DC/DC converter - AR54.10-P-1350NKE

MODEL 242 with ENGINE 780 

Shown on MODEL 242 with ENGINE 780 up to model year 2015, modification year 14/2 

Shown on MODEL 242 with ENGINE 780 as of model year 2015, modification year 14/2 

	Risk of death  when touching components on vehicles with high-voltage on-board electrical system	Do not touch components and open lines of the high-voltage on-board electrical system. Persons who wear electronic implants (e.g. cardiac pacemakers), must not  carry out any work on high-voltage on-board electrical systems.	AS54.00-Z-0001-01A
	Notes on coolant		AH20.00-N-2080-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Note on high-voltage on-board electrical system		AH54.00-P-0010-01A
	Evaluation of high-voltage components		AH54.00-P-6500-01SXH
	Remove/install
1	Perform disable for the high-voltage on-board electrical system		AR54.10-P-1150NKE
2	Remove high-voltage battery charger (1)		AR54.10-P-5106NKE
3	Remove high-voltage distributor (2)		AR54.10-P-1400NKE
		Place high-voltage distributor (2) with connected high-voltage electrical lines to one side and fix in place.
4	Remove vacuum line (3)	MODEL 242 with ENGINE 780 without CODE 055 (Modification year 14/2) without CODE 805 (Model year 2015) To do so, release lock (4).
5	Detach coolant lines (5)	MODEL 242 with ENGINE 780 without CODE 055 (Modification year 14/2) without CODE 805 (Model year 2015) To do so, pry off coolant lines (5) with clamps (21).
		Clamp	Fig 8
6	Detach coolant line (6)	MODEL 242 with ENGINE 780 without CODE 055 (Modification year 14/2) without CODE 805 (Model year 2015) To do so, pry off coolant line (6) with hose clamp pliers (20).
		Hose clamp pliers	Fig 12
7	Detach positive line (7)	MODEL 242 with ENGINE 780 without CODE 055 (Modification year 14/2) without CODE 805 (Model year 2015) To do so, remove cap (8) and remove bolt (9) and nut (10). Cover up positive line (7) using suitable protective cover.
		Nut, 12V cable (positive) to DC/DC converter	*BA54.18-P-1003-02B
		Set of protective covers	Figure
8	Detach ground line (11)	MODEL 242 with ENGINE 780 without CODE 055 (Modification year 14/2) without CODE 805 (Model year 2015) To do so, unscrew nut (12). Cover up ground line (11) using suitable protective cover.
		Nut, 12V cable (ground) to DC/DC converter	*BA54.18-P-1002-02B
		Set of protective covers	Figure
9	Remove cap (13)	MODEL 242 with ENGINE 780 without CODE 055 (Modification year 14/2) without CODE 805 (Model year 2015)
10	Disconnect electrical connection (14)	MODEL 242 with ENGINE 780 without CODE 055 (Modification year 14/2) without CODE 805 (Model year 2015) Cover up electrical connection (14) using suitable protective cover.
		Set of protective covers	Figure
11	Detach electrical line (15)	MODEL 242 with ENGINE 780 without CODE 055 (Modification year 14/2) without CODE 805 (Model year 2015) To do this, remove bolt (16).
		Bolt, holder for 12V cable (ground) to drive unit frame	*BA54.18-P-1004-02B
12	Disconnect electrical connection (17)	MODEL 242 with ENGINE 780 without CODE 055 (Modification year 14/2) without CODE 805 (Model year 2015) Cover up electrical connection (17) using suitable protective cover.
		Set of protective covers	Figure
13	Remove bolt (18)	MODEL 242 with ENGINE 780 without CODE 055 (Modification year 14/2) without CODE 805 (Model year 2015)
14	Detach ground line (22)	MODEL 242 with ENGINE 780 with CODE 055 (Modification year 14/2) with CODE 805 (Model year 2015) To do so, unscrew nut (23) and release retaining clip (24).
		Nut, 12V cable (ground) to DC/DC converter	*BA54.18-P-1002-02B
15	Detach ground strap (25)	MODEL 242 with ENGINE 780 with CODE 055 (Modification year 14/2) with CODE 805 (Model year 2015) To do so, remove bolt (26) and release retaining clip (27).
16	Detach positive line (28)	MODEL 242 with ENGINE 780 with CODE 055 (Modification year 14/2) with CODE 805 (Model year 2015) To do this remove nut (29).
		Nut, 12V cable (positive) to DC/DC converter	*BA54.18-P-1003-02B
17	Disconnect electrical connection (30)	MODEL 242 with ENGINE 780 with CODE 055 (Modification year 14/2) with CODE 805 (Model year 2015) Cover up electrical connection (30) using suitable protective cover.
		Set of protective covers	Figure
18	Detach coolant lines (31) and cover up openings on DC/DC converter control unit (N83/1) using suitable protective cover	MODEL 242 with ENGINE 780 with CODE 055 (Modification year 14/2) with CODE 805 (Model year 2015) To do so, pry off coolant lines (31) using hose clamp pliers (20).
		Set of protective covers	Figure
		Hose clamp pliers	Fig 12
19	Unscrew screws/bolts (32)	MODEL 242 with ENGINE 780 with CODE 055 (Modification year 14/2) with CODE 805 (Model year 2015)
		Bolt, bracket to DC/DC converter	*BA54.10-P-1008-03D
20	Unfasten bolts (35) and move bracket (33, 34) to one side	MODEL 242 with ENGINE 780 with CODE 055 (Modification year 14/2) with CODE 805 (Model year 2015)
21	Remove DC/DC converter control unit (N83/1)
22	Detach and modify electrical connection (19)	When replacing DC/DC converter control unit (N83/1). Cover up electrical connection (19) using suitable protective cover.
		Set of protective covers	Figure
23	Enter new serial number in VeDoc (Vehicle Documentation)	When replacing DC/DC converter control unit (N83/1).
24	Install in the reverse order
25	Perform protective earth conductor and insulation resistance test		AR54.10-P-0019-01NKE
		The vehicle must be de-energized.
26	Pour in coolant and bleed cooling system		AR20.00-P-1142-04AK
		Cooler vacuum filling device	Fig 11
		Test cap	Fig 10
		Test cap	Fig 9
27	Check low-temperature circuit cooling system for leaktightness		AR20.00-P-1010NKE

Number	Designation		MODEL 242 with ENGINE 780
BA54.10-P-1008-03D	Bolt, bracket to DC/DC converter	Nm	9

Number	Designation		MODEL 242 with ENGINE 780
BA54.18-P-1002-02B	Nut, 12V cable (ground) to DC/DC converter	Nm	17

Number	Designation		MODEL 242 with ENGINE 780
BA54.18-P-1003-02B	Nut, 12V cable (positive) to DC/DC converter	Nm	9

Number	Designation		MODEL 242 with ENGINE 780
BA54.18-P-1004-02B	Bolt, holder for 12V cable (ground) to drive unit frame	Nm	9