Power Protection Relay: Service and Repair

WM 974619 Removing and installing cutoff relay

Technical values





Preliminary work

1. Remove left front seat. -> 720119 Removing and installing front seat - section on "Removing" 720119 Removing and installing front seat

Removing cutoff relay

WARNING

Incorrect handling of safety bolts

- Danger of injury
- Loss of torque

-> Always use new fastening screws and nuts following removal.
-> Observe specified tightening torques.
-> Carry out a visual inspection of all re-used parts.





Installation position of cutoff relay

NOTICE

Voltage peaks

- Risk of damage to loads or to the control unit

-> Disconnect the battery before removing the component or control unit.

1. Fold up carpet and move it aside.
2. Unclip the small plastic cover -1- and remove it by pulling it upwards.





Unclip the small plastic cover on the power distributor.

3. Unscrew fastening nut -2- on the fuse element unit.





Unscrewing fastening nut

4. Release three plug connections -3- from the holders for the large plastic cover -4- on the power distributor and unclip at the sides.
5. Unscrew fastening screw -5- on the large plastic cover -4- on the power distributor and unclip at the sides.





Unscrewing fastening screw on plastic cover for power distributor

6. Carefully turn the large plastic cover -4- on the power distributor to the side.





Turning plastic cover on power distributor to the side

7. Release and unplug electric plug connection -6- on the cutoff relay -7- ( -a- ).





Pulling off connector for cutoff relay

8. Screw off two fastening nuts -8- and remove the cutoff relay -7- by pulling it up.





Removing cutoff relay

Installing cutoff relay

1. Position the cutoff relay in the power distributor.





Installing cutoff relay

2. Tighten two fastening nuts -8- on the cutoff relay -7- to => Tightening torque: 8 Nm (6 ftlb.).
3. Plug electric plug connection -6- into the cutoff relay -7- and lock it -a-.





Plugging in connector on cutoff relay

4. Carefully position the large plastic cover -4- on the power distributor, clip it in at the sides and secure the plastic cover with the fastening screw -5-.





Screwing in fastening screw on plastic cover for power distributor

5. Clip in three plug connections -3- on the holders for the large plastic cover -4-.





Tightening fastening nut

6. Tighten fastening nut -2- on the fuse element unit to => Tightening torque: 5 Nm (3.5 ftlb.).
7. Position and clip in the small plastic cover -1-.





Clipping in small plastic cover

8. Fold down carpet and lay it back neatly.

Subsequent work

1. Install left front seat. -> 720119 Removing and installing front seat - section on "Installing" 720119 Removing and installing front seat