Checking charging current of alternator - AR15.40-P-5011I

ENGINE 113.960 /986, 137.970, 275 in MODEL 215

ENGINE 112.922 /944 /975, 113.941 /948 /960 /966 /986, 137.970, 275 in MODEL 220

Connection diagram

Fig 1: Identifying Charging Current Of Alternator - Connection Diagram

	Checking
	Risk of explosion caused by oxyhydrogen gas. Risk of poisoning and caustic burns caused by swallowing battery acid. Risk of injury caused by burns to skin and eyes from battery acid or when handling damaged lead-acid batteries	No fire, sparks, open flames or smoking. Wear acid-resistant gloves, clothing and goggles. Only pour battery acid into suitable and appropriately marked containers.	AS54.10-Z-0001-01A
	Notes on battery		AH54.10-P-0001-01A
1	Test regulation voltage of alternator (G2)		AR15.40-P-5010I
2	Connect volt ampere tester (079) with current clamp (065) according to connection diagram	Volt ampere tester with load resistance	*WH58.30-Z-1002-09A
		Volt ampere tester ETT 011.00	*WH58.30-Z-1003-09A
	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 running engine	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not grasp hot or rotating parts.	AS00.00-Z-0005-01A
3	Start engine
4	Load battery (G1) with volt ampere tester (079) and check charging current of alternator (G2) with increased engine speed	Vary load resistance long enough until the maximum load current is achieved; when this is done, the regulating voltage must not drop below 12.7 V.
		Engines 112, 113	*BE15.40-P-1001-01K
		Engine 137	*BE15.40-P-1001-01A
		Engine 275	*BE15.40-P-1001-01I
		Volt ampere tester with load resistance	*WH58.30-Z-1002-09A
		Volt ampere tester ETT 011.00	*WH58.30-Z-1003-09A
		Charging current below desired value: ↓
		Check diodes for alternator (G2).	AR15.40-P-9301-02I
		Engine tester with oscilloscope	*WH58.30-Z-1046-13A
		If diodes are faulty: ↓ Replace alternator (G2)
		Engines 112, 113	AR15.40-P-5032I
		Engine 137	AR15.40-P-5032N
		Engine 275	AR15.40-P-5032LA
5	Turn off engine
6	Disconnect volt ampere tester (079) with current clamp (065)	Volt ampere tester with load resistance	*WH58.30-Z-1002-09A
		Volt ampere tester ETT 011.00	*WH58.30-Z-1003-09A

CHECK VALUES FOR ALTERNATOR

Number	Designation			Engine 137.970 NF 14 V 90/150 A
BE15.40-P-1001-01A	Charging current of alternator	max.	A	150
		min.	A	120
		Engine speed	rpm	2500
		Ratio	I=	2.9

CHECK VALUES FOR ALTERNATOR

Number	Designation			Engine 275 in models 215, 220, 230, Bosch
BE15.40-P-1001-01I	Charging current of alternator	max.	A	180
		min.	A	140
		Engine speed	rpm	2000
		Ratio	I=	2.93

CHECK VALUES FOR ALTERNATOR

Number	Designation			Engine 112 in model 220, 230, in model 210 with code 978, in model 211 with code 910, Bosch	Engine 113 in models 163, 171, 203, 208, 209, 210, 211, 215, 219, 220, 230 except models 211.076/276, 215.374, 219.376, 220.074/174, 230.472/474 Bosch
BE15.40-P-1001-01K	Charging current of alternator	max.	A	150	150
		min	A	120	120
		Engine speed	rpm	2500	2500
		Ratio	I=	2.93	2.93

COMMERCIALLY AVAILABLE TOOLS

Number	Designation
WH58.30-Z-1002-09A	Volt-amp(s) tester with load resistance (no longer available)
WH58.30-Z-1003-09A	Volt ampere tester
WH58.30-Z-1046-13A	Engine tester with oscilloscope