2 | Oil reservoir |
3 | Retarder housing |
4 | O-ring |
5 | O-ring |
6 | Screw |
W43.30-1133-06
| Remove | ||
Topical note | Notes on heat exchanger | Model 375.4, 944 | |
Warning | Risk of injury caused by touching hot retarder and by scalding from hot retarderoil. Risk of injury to skin or eyes caused by retarder oil escaping under high pressure | Do not carry out any work unless retarder is switched off. Wear suitable protective clothing and safety glasses when working on the hot retarder. | |
1 | Drain oil from retarder and determine oil filling capacity | ||
| Model 375.4, 944 | ||
2 | Remove coolant temperature sensor | ||
3 | Remove coolant hoses | ||
4 | Unscrew holder of coolant pipes and tie coolant lines to one side. | ||
5 | Remove heat exchanger (1) and remove O-rings (4, 5) | Support heat exchanger. | |
6 | Check heat exchanger | ||
| Install | ||
7 | Insert new O-rings (4, 5) into bores | Lightly grease new O-rings. | |
Vaseline | |||
8 | Attach heat exchanger (1) to oil container (2) | Bolt, heat exchanger to oil reservoir | |
9 | Install coolant temperature sensor | ||
10 | Attach coolant hoses | ||
11 | Fill retarder oil | ||
| Model 375.4, 944 | ||
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. | |
12 | Let engine warm-up at moderate rpm up to a coolant temperature of approx. 80 °C and keep at this coolant temperature for approx. 5 minutes | The cooler can be covered if necessary. | |
13 | Flush retarder system | ||
| Retarder - oil change | Model 375.4, 944 | |
Only there is coolant in the retarder oil. | |||
| |||
Via several light brake applications, flush retarder system; then drain oil and refill retarder again. | |||
| |||
14 | Degrease the cooling and heating system of the vehicle |
| |
Only if there is oil in the coolant. |