1 | Drain plugs (with magnet) |
2 | Drain screw |
3 | Locking pressure line (feed line) |
4 | Bolts |
5 | Control valve |
W43.30-A052-76
Warning | Risk of injury. Skin or eye injuries may result when handling hot or glowing objects. | Wear protective gloves, protective clothing and safety glasses, if necessary. | |
Danger | Risk of death to implant wearers from working on retarder | As a safe distance from the retarder, a minimum distance of 100 cm is to be maintained between the retarder and the body parts of the affected person for people with implants. | |
Warning | Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant. | Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. | |
Warning | Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | |
Topical note | Notes on influence of retarder on coolant/coolant sludging | ||
Topical note | Notes on coolant | ||
Topical note | Notes on avoiding damage through contamination and foreign objects | ||
Topical note | Notes on self-locking nuts and bolts | ||
| Remove/install | ||
1 | Start engine and fill compressed-air system at idle speed. | Until a reservoir pressure > 9 bar is reached in pressure circuits 1 and 2. | |
2 | Switch off engine. | ||
3 | Remove noise encapsulations. | ||
4 | Drain coolant at drain screws (1, 2) of retarder. | ||
| Connection fitting for coolant return line on retarder modified | ||
Engine 470.9, 471.9, 473.9 | |||
Engine 936.9 | |||
| |||
5 | Remove locking pressure line (3). | ||
| Locking pressure feed line, modified | ||
6 | Remove screws (4). | Installation: | |
Bolts, regulating valve to valve block / side channel pump | |||
7 | Remove regulation valve (5). | ||
| Regulating valve of retarder modified | as from retarder number 3884701 | |
Wacker® silicon paste P | |||
8 | Install in the reverse order |