Glow Plugs - Test - Perkins 1104D NH1 Systems Operation Testing And Adjusting

RENR7967
Remove the starting motor for repair or
replacement.
b. The starting motor does not crank.
Check for the blocked engagement of the
pinion gear and flywheel ring gear.
Note: Blocked engagement and open solenoid
contacts will give the same electrical symptoms.

Glow Plugs - Test

Continuity Check of the Glow Plugs
The following test will check the continuity of the glow
plugs.
1. Disconnect the power supply and the bus bar.
2. Use a suitable digital multimeter to check
continuity (resistance). Turn the audible signal on
the digital multimeter ON.
3. Place one probe on the connection for the glow
plug and the other probe to a suitable ground. The
digital multimeter should make an audible sound.
Replace the glow plug if there is no continuity.
4. Check the continuity on each the glow plugs.
Checking The Operation of The
Glow Plug
The following test will check the operation of the glow
plugs.
1. Disconnect the power supply and the bus bar.
2. Connect the power supply to only one glow plug.
3. Place a suitable ammeter on the power supply
wire.
4. Connect a suitable digital multimeter to the
terminal on the glow plug and to a suitable ground.
5. Turn the switch to the ON position in order to
activate the glow plugs.
Table 19
i02404326
Table 20
6. Check the reading on each glow plugs.
7. If there is no reading on the ammeter check the
electrical connections. If the readings on the
ammeter are low replace the faulty glow plug. If
there is still no reading replace the faulty glow
plug.
Testing and Adjusting Section
12 Volt System
Amp Time (sec)
16.6
12
9
7
6
24 Volt System
Amp Time (sec)
9
7
6
3
83
Initial
5.7
11.1
20
60
Initial
3.3
5.3
60