Removing and installing coolant circulation pump - AR83.70-P-5700C

MODEL 129 as of 1.6.97 with CODE (228) Stationary heater 

Fig 1: Identifying Coolant Circulation Pump Components

	Removal, installation
1	Detach heater (A6) from longitudinal frame member until circulation pump (A6m1) is free.	Support heater before unscrewing nuts.	AR83.70-P-5302C
2	Pull cover (7) off of multi-point connector
3	Disconnect connector for circulation pump (6)	The connector is coded and the polarity can therefore not be reversed.
	Danger  of severe burns to skin and eyes from hot coolant spewing out. Coolant is toxic  when swallowed	Open cooling system only when coolant temperature is below 90°C. Open cover slowly and reduce pressure. Do not fill beverage containers with coolant. Wear protective gloves, protective clothing and protective goggles.	AS20.00-Z-0001-01A
4	Release pressure in coolant circuit	For this purpose turn cap on coolant expansion reservoir to catch position 1
5.1	Clamp off coolant inlet lines (5) to circulation pump (A6m1)	Removal  : When heater has been completely removed step 5 is not necessary.	Figure
5.2	Disconnect coolant feed lines (5) to circulation pump (A6m1)	Installation  : Add coolant running out to coolant expansion reservoir.
6	Unscrew screw (1) and unhook bracket (23)	Installation  : Hook in bracket first.	*BA83.70-P-1004-01A
7	Loosen hose clamps (4) and disconnect coolant hose (3)
8	Reinstall in opposite order
9	Bleed coolant circuit after installing heater		AR83.70-P-5302-01C
10	Stationary heater (STH), diagnosis, function check		AD83.70-P-3003A
11	Check coolant circuit for leakage		ra20001190170x

STATIONARY HEATER

Number	Designation		Models 129, 163, 168 with Thermo Top C heater
BA83.70-P-1004-01A	Screw for stationary heater coolant circulation pump	Nm	4

Fig 2: Identifying Clamp (000 589 40 37 00)