Coolant outlet for external heating · heating of the bodywork installation, it can affect the engine’s service life (applies especially to engines with EGR system) and the engine’s

07:40-01 Issue 5 en-GB

Coolant outlet for external heating
General
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Flow overview, external heating.

GeneralEngine coolant can be used to heat external elements. Examples include box bodies, crane cabs and storage boxes.

Heat is taken from the flow in the cylinder block and is returned through the pipe af-ter the radiator.

IMPORTANT!

• The following conditions apply to ensure the correct flow of coolant in the exter-nal circuit:

– The inside diameter of pipes and hoses may be maximum 13 mm (1/2").– Use the existing connection nipple for outlet and return.

• The coolant directed back to the engine must not be hotter than when it was taken out of the engine.

• Do not use pipes, nipples or heat exchangers made of brass or copper as these could cause sludge to build up in the coolant.

• Connect the return hose from the external circuit to the connection pipe under the radiator. More information is found under the heading Coolant return.

• Some coolants can cause corrosion in the cooling system. Only use coolant ap-proved by Scania. Contact a Scania dealer for more information.

• Protect coolant hoses from contact with oil and diesel as this could damage the hoses and cause leakage.

• When an extra electrical circulation pump is connected to an external circuit, the circuit's maximum total flow should be 30 l/min.

1 (11)© Scania CV AB 2016, Sweden

Coolant outlet for external heatingGeneral

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Thermostat installed in bodywork circuit.

Additional requirements that apply to Euro 6 en-gines

IMPORTANT!

Do not take out so much heat for the bodywork circuit that the engine’s heating-up time to 60°C exceeds 20 minutes. If the engine’s heating-up time is extended due to heating of the bodywork installation, it can affect the engine’s service life (applies especially to engines with EGR system) and the engine’s aftertreatment (catalytic converter). For all Euro 6 engines, extended heating-up time can increase fuel con-sumption.

If the bodywork circuit for external heating is used in conditions below 0°C, a ther-mostat or valve needs to be installed for the bodywork circuit. The thermostat or valve must not open the flow to the bodywork circuit before the coolant temperature has reached 60°C to ensure that not too much heat is taken out during the heating-up of the engine.

© Scania CV AB 2016, Sweden07:40-01 Issue 5 en-GB 2 (11)


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Thermostat with leakage flow installed in bodywork circuit, with external heating circuit.

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Thermostat with leakage flow installed in bodywork circuit.

Information on filling of coolant is found in the document Filling coolant.

A thermostat with leakage flow should be installed as close as possible to the coolant outlet.



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Coolant outlet locationsInline enginesThe connection nipple on the oil cooler on the right-hand side of the engine.

V-engines Euro 5 and earlier (except 730 hp)The upper connection nipple on the right-hand side of the engine.

V-engines Euro 5 730 hp and Euro 6 The rear connection point between cylinders 7 and 8 on the left-hand side of the en-gine, or the rear connection nipple located between cylinders 3 and 4 on the right-hand side of the engine (if the outlet is available).

Connection nipples can be purchased from Scania dealers. More information is found under the heading Parts for the work.

Gas enginesFor the connection of external heating to gas engines, contact a Scania dealer.


Coolant outlet for external heatingParts for the work

Parts for the workThe following spare parts can be purchased from a Scania dealer, but use of other, equivalent parts is permitted:

Designation Part number IllustrationCoolant tank 588 135

Adapter for filling coolant 99 301

Connection nipple 1 853 404a

a. Existing connection nipple for all engines except V-engines Euro 5 730 hp and Euro 6

Sealing washer 1 374 839

Thermostat 2 256 956

Flange 1 813 318

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Coolant outlet for external heatingWork description

Work descriptionWARNING!

• When the engine is at operating temperature, the coolant is very hot and can cause burns.

• The cooling system may be exposed to pressure.

Wear eye protection and make sure that coolant temperature is not too high when draining the cooling system.



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Location of drain and filler nipple under the cab front, viewed from the front.

Draining coolant1. Carefully open the expansion tank cap.

2. Remove the rubber plug that protects the cooling system connection nipple. The connection nipple is at the bottom of the pipe inside the radiator and is visible di-rectly under the cab front. See the illustration.

3. Connect a hose to the nipple.

4. Drain coolant from the radiator, letting it run until no more comes out. Always use a clean storage container if the coolant is to be reused.

5. Disconnect the hose and connect it to the engine's connection nipple to drain the remaining water from the engine.

Environment

Handle drained coolant as environmentally hazardous waste.



on V-engines Euro 5 and ear-ept 730 hp)

Blanking piece on V-engines Euro 5 730 hp and Euro 6 (delivery version)

Connection nipple on V-engines Euro 5 730 hp and Euro 6

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6. Drain coolant from the engine. On V-engines, it is enough to drain coolant from the upper connection nipple on the right-hand side of the engine.

Connection nipple location on inline engines Connection nipple locationlier (exc



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Inline engines.

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V-engines Euro 5 and earlier (except 730 hp).

Coolant outlet connectionInline engines

1. Connect the hose with adapter to the engine’s connection nipple, see illustration.

If the hose must be bent, the existing connection nipple should be replaced with an elbow union.

2. Clamp the hose at a suitable place to relieve the load on the nipple and adapter.

3. Connect the hose to the intake of the external element.

V-engines Euro 5 and earlier (except 730 hp)1. Connect the hose with the adapter to the upper connection nipple on the right-

hand side of the engine.

If the hose must be bent, the existing connection nipple should be replaced with an elbow union. During fitting, the elbow union could hit the lower connection nipple. If this is the case, the lower connection nipple must be removed first. Drain the rest of the coolant via the lower connection nipple before the renewal.

2. Clamp the hose at a suitable place to relieve the load on the nipple and adapter.




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V-engines Euro 5 730 hp and Euro 6

V-engines Euro 5 730 hp and Euro 6 Note:A flange with connection nipple is located further forward on the left-hand side of the engine. This can be used as an alternative coolant outlet. The flange can also be removed and switch places with the blanking piece. The parts can also be purchased from a Scania dealer.

1. Replace the blanking piece 1 813 319 with flange 1 813 318.

2. Screw connection nipple 1 853 404 into place together with sealing washer 1 374 839.

3. Connect the hose with adapter to the connection nipple. Route the hose rearwards inside the chassis frame as illustrated. There is room between the starter motor and the gear shift linkage.




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Coolant returnIMPORTANT!

The return pipe from the external circuit must not be connected to any of the return hoses from the expansion tank or compressor due to the following risks (see illustra-tion to the right):

• Cavitation in the coolant pump, which could lead to leakage in the pump shaft seal and too low flow in the cooling system.

• Too low flow to the compressor and turbocharger.

The return pipe from the external circuit must be connected to the connection nipple for draining of the coolant. A T-piece can be fitted to get an own inlet for the external circuit as shown in the illustration.


Documents

Coolant outlet for external heating · heating of the bodywork installation, it can affect the engine’s service life (applies especially to engines with EGR system) and the engine’s