Engine Speed Measuring - Magnetic Probe Tool (58/14)

Publication date: 1983-04-01
Reference number: 58/14

ENGINE SPEED MEASURING - MAGNETIC PROBE TOOL

TECHNICAL SERVICE BULLETIN

Reference Number(s): 58/14, Date of Issue: April, 1983
Superceded Bulletin(s): 58/14

MAGNETIC PROBE FOR ENGINE SPEED MEASUREMENTS - ENGINES 616 AND 617 WITH TDC TRANSMITTER BRACKET

Model(s): 300D/CD/TD/SD

Group: Tools

Bulletin No.: 58/14a

Date: April, 1983 (supersedes 58/14)

SERVICE INFORMATION

This Service Information is being reissued to include engine type 617.950, which also has an integrated TDC transmitter.

A magnetic probe (Fig 1 ) is available as a special tool to measure the speed of the subject diesel engines. The probe includes a TDC transmitter (transmitting the RPM signal), a test socket, and alligator clips for connection to the vehicle battery. This special tool is used in conjunction with the All-Test 3610-MB Universal Digital Tach. This probe will also be compatible with future engine testers which conform to Mercedes-Benz requirements.

NOTE: Engine types 617.950/951/952 have an integrated TDC transmitter and therefore do not need this magnetic probe.

Fig 1: Magnetic Probe (Tool No. 616 589 00 21 00)

INSTRUCTION FOR USING THE PROBE

When installing the special tool into the TDC transmitter bracket, the snap-on connector must be slipped on the securing bolt (Fig 2 ) down to the stop, otherwise the TDC transmitter can be damaged. If the tool is installed correctly, the insertion rod cannot be rotated. Engage the spring at the upper end of the insertion rod in the engine suspension eye as a safeguard.

The TDC transmitter is coupled to a test socket, which is connected to the 9-pin diagnostic plug of the engine tester (see connection schematic). In the case of the All-Test 3610-MB Universal Digital Tach, the magnetic probe connection cable must also be connected to the vehicle battery via the alligator clamps provided (this does not apply to engine testers powered by workshop 115 Volt AC systems).

A defective transmitter of this special tool can be replaced separately and is available as a spare part (see Parts Information). Prior to installation of the transmitter into the snap-on connector, the bore (arrow, Figure 3) must be enlarged to a diameter of 8 mm. The three cable straps with which the lead is secured to the insertion rod should also be replaced at this time.

Fig 2: Connection Schematic

Fig 3: TDC transmitter

TOOL INFORMATION

TOOL NAME	GROUP/CATEGORY
Magnetic probe	07/C

PARTS INFORMATION

PART NAME	PART NUMBER
Transmitter (with bracket)	001 153 83 28
Cable strap	001 997 41 90