AR83.70-D-5302C | Remove/install heater unit | 12.12.06 |
MODEL 667, 668, 670 with CODE (H14) High performance warm water auxiliary heater
except Medio
D83.70-0002-06
1 Connector
2 Connector
3 Bayonet nut
4 Coolant hose
5 Coolant hose
6 Hose clamp
7 Connection fitting
8 Hose clamp
9 Heater unit
10 Coolant hose
11 Connection fitting
12 Cable tie
13 Connector hose (fuel)
14 Hose clamp
15 Hose clamp
16 Exhaust pipe
17 Combustion air intake line
18 Bracket (with regulating valve)
19 Hose clamp
20 Bolt
D83.70-0001-06
21 Washer
22 Base plate for control units
23 Retaining rail
24 Nut
25 Washer
26 Cover
27 Plastic screw
28 Retaining rail
29 Nut
| Remove/install | ||
Danger! | Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel and risk of injury to eyes and skin caused by contact with fuel | No fire, sparks, open flames or smoking. Wear protective clothing when handling fuel. | |
Danger! | Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by 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. Wear protective gloves, protective clothing and safety glasses. | |
1 | Release pressure in cooling and heating circuit at coolant expansion reservoir cap | ||
2 | Provide clean container for collecting escaping coolant | ||
3 | Remove cable tie (12) | ||
4 | Detach bayonet nut (3) and disconnect connector | ||
5 | Clamp off coolant hose (5) | | |
6 | Loosen hose clamp (6) on connection fitting (7) of coolant recirculation pump and detach the coolant hose (5) | ||
7 | Loosen hose clamp (8) on connection fitting (11) of heater (9) and detach the coolant hose (10) | ||
8 | Remove bolts (20) from bracket (18) of regulating valve | Only with code H13 or H67 Additional heat exchanger | |
9 | Loosen hose clamp (19) on fuel line connector hose (13) and detach connector hose from connection fitting | ||
10 | Seal off fuel line connector hose (13) using a suitable stopper | ||
11 | Loosen clamps (14, 15) on exhaust pipe (16) and combustion air intake line (17) | ||
12 | Detach exhaust pipe (16) and combustion air intake line (17) | ||
13 | Take off cover (26) | Installation: Insert cover (26) into retaining strip (28) and secure with new plastic bolts (27). | |
14 | Unscrew nuts (29) with washers (21) and remove base plate for control units (22) | Installation: Replace self-locking nuts (29). | |
15 | Unscrew nuts (24) with washers (25) and remove heater (9) | Installation: Replace self-locking nuts (24). | |
16 | Install in the reverse order | ||
17 | Refill escaped coolant | ||
Danger! | Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running | Secure vehicle to prevent it from moving by itself. | |
18 | Start engine and run for approx. 1 min at varying rpms to bleed the cooling and heating circuit | Monitor coolant level in expansion reservoir while engine is running and refill coolant if necessary. | |
19 | Turn off engine | ||
20 | Check coolant hose connections (5, 10) to heater (9) for leaks | ||
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 areas or when refueling. Allow heater unit to cool down after operation and wear protective gloves. | |
21 | Check function of stationary heater |
Auxiliary heater heating unit
Number | Designation | Model | ||
BA83.70-N-1001-03B | Nut, heater at bulkhead | Nm | 25 | |
BA83.70-N-1002-03B | Bolt, regulating valve bracket to heater | Nm | 25 | |
Clamping device
000 589 54 37 00