Removing and installing engine coolant pump - AR20.10-P-1271AX

ENGINE 601 in MODELS 124, 201, 202

ENGINE 602 in MODELS 124, 201

ENGINE 603 in MODELS 124, 126, 140

Fig 1: Identifying Engine Coolant Pump Removal/Install Components - Engine 601 In Models 124, 201, 202

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

MODIFICATION NOTES

1.9.95

Coolant pump with increased volumetric flow

Refer to step 15

	Removing, installing
1	Drain coolant		ra20006010010x
2	Remove radiator	Model 201.126	AR20.20-P-3865HW
3	Remove solenoid fan clutch	Engines with solenoid fan clutch	ra20006010335x
4	Remove viscous fan clutch	Engine 601 in model 202	AR20.40-P-5660HA
		Engines 601, 602 in models 124, 201	AR20.40-P-5660HW
		Engine 603 in models 124, 126, 140
5	Disconnect ground cable from battery		AR54.10-P-0003A
6	Slacken bolts (2) of belt pulley of coolant pump.		*BA20.10-P-1001-01A
			Fig 2
7	Remove poly V-belt		AR13.22-P-1202HW
8	Unbolt belt pulley (5)	Do not remove solenoid carrier (34) on engines with solenoid fan clutch. Stick loose solenoid carriers in place with adhesive.	*BR00.45-Z-1010-02A
9	Disconnect coolant hose (3) and heating water hose (4) from coolant pump housing.
10	Remove generator (15)
11	Remove generator carrier (16).		*BA15.40-P-1005-01E
12	Remove coolant pump housing (1) together with coolant pump	When removing the coolant pump housing, pull the housing off the heater return line (18).
		Installation: Moisten seal (17) with coolant. Do not use oil.
			*BA20.10-P-1003-01A
13	Replace gasket (14). Clean sealing surfaces.
14	Unscrew coolant pump (6)	As of 11/1995, a coolant pump with increased volumetric flow is installed with engine 603.960/971. Refer to ↓	*BA20.10-P-1002-01A
		Coolant pump with increased volumetric flow	BT20.10-P-0001-01A
15	Replace gasket (10). Clean sealing surfaces.
16	Install in the reverse order
17	Test cooling system for leaks		AR20.00-P-1010HA

COOLANT PUMP, COOLANT THERMOSTAT

Number	Designation		Engines 601, 602 except 602.98, 603
BA20.10-P-1001-01A	Bolt, pulley to coolant pump	Nm	15
BA20.10-P-1002-01A	Bolt, coolant pump to coolant pump housing	Nm	10
BA20.10-P-1003-01A	Bolt, coolant pump housing to crankcase	Nm	10

GENERATOR

Number	Designation			Engine 601	Engine 602	Engine 603
BA15.40-P-1005-01E	Bolt, generator carrier to crankcase	M8	Nm	25	25	25
BA15.40-P-1005-01E	Bolt, generator carrier to crankcase	M10	Nm	45	45	45

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1010-02A	Adhesives	A 003 989 32 71 10

Fig 2: Identifying Counter holder (603 589 00 40 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.