INSULATION 4553388 - Caterpillar

4553388 INSULATION Caterpillar parts

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Alternative (cross code) number:
CA4553388
455-3388
4553388

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Number on catalog scheme: 10

Caterpillar 4553388 Parts scheme INSULATION

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Product:

308E Mini Hydraulic Excavator TAZ00001-UP (MACHINE) POWERED BY C3.3B Engine

455-1969: FIREWALL GP » SEBP64180104

307E Mini Hydraulic Excavator H1Y00001-UP (MACHINE) POWERED BY C2.6 Engine

455-1969: FIREWALL GP » SEBP68550149

307E2 Mini Hydraulic Excavator KC900001-UP (MACHINE) POWERED BY C2.4 Engine

455-1966: FIREWALL GP » SEBP76230148

307E2 Mini Hydraulic Excavator CE200001-UP (MACHINE) POWERED BY C2.6 Engine

455-1969: FIREWALL GP » SEBP76260102

308E2 Mini Hydraulic Excavator F8C00001-UP (MACHINE) POWERED BY C3.3B Engine

455-1969: FIREWALL GP » SEBP76270101

Information:

Illustration 1 g00677004
PMPE Generator Wiring Diagram
(CR1-CR6) Diodes
(CR7) Varistor
(L1) Exciter field (stator)
(L2) Exciter armature (rotor)
(L3) Main field (rotor)
(L4) Main armature (stator)
(L5) Pilot exciter armature
(PM) Permanent magnet
(RFA) Rotating field assembly
(CST) Customer supplied transformer Ohmmeter
An ohmmeter can be used to check a varistor (CR7). Place an ohmmeter across the varistor. The resistance should be a minimum of 15000 ohms. If the resistance is less than 15000 ohms, the varistor is faulty.Test Light
Illustration 2 g00555113
Test Light
Refer to the test light that is shown in Illustration 2. Follow these steps in order to test the varistor:
Disconnect either lead of the varistor (CR7).
Place the test light across the varistor.
Observe the results. The lamp should not light.
Reverse the test light.
Observe the results. The lamp should not light. If the test light illuminates in either direction, there is a short in the varistor. Replace any faulty varistors with varistors that have comparable operating characteristics. Include the following information when a varistor is being ordered for replacement:
Part number of the varistor
Serial number of the generatorAfter the varistor has been replaced, verify that the strapping of the field winding lead is securely wound on the shaft. Also, verify that the strapping of the field winding lead is securely tied.