P83.70-2621-09
3 | Coolant outlet line, heater | 10 | Coupling, control lines | A6 | Heater unit | ||
4 | Coolant feed line, heater | 11 | Holder (heater booster) | M13/2 | Coolant recirculation pump | ||
6 | Nut | 12 | Combustion air intake line | X73/2 | Coolant circulation pump connector | ||
7 | Fuel feed line | 14 | Exhaust line | Y23 | Fuel metering pump | ||
9 | Coupling, power supply | a | Rubber mount | Y23x1 | Fuel metering pump connector |
P83.70-2625-07
6a | Screw | 17 | Screw | M13/2 | Coolant recirculation pump | ||
11 | Holder (heater booster) | a | Rubber mount | X73/2 | Coolant circulation pump connector | ||
13 | Bow | A6 | Heater unit | Y23 | Fuel metering pump |
| Remove | ||
Danger | Risk of explosion caused by fuel vapors igniting, risk of poisoning caused by inhaling combustible gases and risk of injury caused by burns during and after operation of heater unit | Do not operate stationary heater, auxiliary heater or engine with heater booster in closed rooms or when refueling. Allow heater unit to cool down after operation and wear protective gloves. | |
Distinguishing features stationary heater/stationary preheater/heater booster | |||
1 | Remove/install bottom sections of soundproofing | ||
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. | |
2 | Release pressure in coolant circuit | To do so, unscrew cap of coolant expansion reservoir slowly by 1/2 turn. | |
3 | Clamp off coolant outlet line (4) and coolant feed line (3) | Clamp | |
4 | Disconnect coolant hoses (3) from heater (A6) and coolant circulation pump (M13/2) | Collect escaping coolant in a clean vessel and, after installation of heater, pour back into coolant expansion reservoir | |
Installation: Inspect condition of collar clamps, replace if necessary. | |||
Danger | Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel. | No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. | |
5 | Clamp off fuel feed line (7) and disconnect from fuel metering pump (Y23) | Installation: | |
Clamp | |||
6 | Disconnect circulation pump connector (X73/2) and fuel pump connector (Y23x1) | Installation: Replace cable tie. | |
7 | Disconnect connection couplings (9, 10) from heater (A6) | ||
8 | Release nut (6) from holder (11) | Detach heater (A6) from stud bolt. | |
9 | Pull exhaust gas line (14) through partition | ||
10 | Slide heater (A6) with holder (11) in direction of travel until rubber mounts (a) are pushed out of crossmember, and guide out heater (A6) in downward direction | ||
| Disassemble/assemble | ||
11 | Disconnect exhaust gas line (14) from heater (A6) | ||
12 | Disconnect fuel line (7) from heater (A6) | ||
13 | Disconnect heater holder (11) with fuel pump (Y23) from heater (A6) | Holder (11) is secured using 3 screws (6a). | |
Bolt, bracket to heater | |||
14 | Remove circulation pump connector (X73/2) from holder (11) | Rotate connector on holder (11) and detach. | |
15 | Disconnect circulation pump (M13/2) from heater (A6) | Assembly: Hook bracket (17) into heater (A6) first. | |
16 | Install in the reverse order | ||
Check | |||
17 | Check relay assignment of heater (A6) on right in engine compartment | ||
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18 | Check fuse assignment of heater (A6) on right in engine compartment | ||
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19 | Bleed coolant circuit after installation of heater | ||
20 | Check cooling system for leaktightness | ||
21 | Perform heater booster (HB) diagnostic function check | ||
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If the heater (A6) switches off automatically before reaching its operating temperature and cannot then be restarted, | |||
there is a fault interlock (continue with). | |||
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Override malfunction interlock | |||
000 589 54 37 00
Clamp
000 589 40 37 00
Clamp