CYLINDER GP-BULLDOZER LIFT 1U4852 - Caterpillar

CONFIDENTIAL TIBU3825-00
TECHNICAL INFORMATION BULLETIN June 25, 2003
PRODUCT FAMILY(S) All Generators that use VR3, VR6B, and DVR Voltage Regulators
Component Code: 1410SUBJECT: Loose Connections on Voltage Regulators Can Lead to Above Normal Voltage Output and Regulator Failure
PROBLEM:
Loose connections on Voltage Regulators can lead to above normal voltage output and regulator failure.
SOLUTION:
In order to help prevent unwanted above-normal voltage outputs and voltage regulator failures, perform the following actions: terminals:
VR3 Voltage Regulators (149-6130, 149-6131, 155-3819, 155-3820, 155-3821)
Add a 5H-6555 Lockwasher beneath VR3 Terminals 6, 7, 20, 22, and 24. Refer to Illustration 1.
VR6B Voltage Regulators (202-8634, 202-8638)
Add a 5H-6555 Lockwasher beneath VR6B Terminals 6, 6A, 7, 20, 22, and 24. Refer to Illustration 2.
DVR Voltage Regulators (155-3831, 155-3832, 155-3833, 155-3834, 155-3835, 155-3836)
Add a 5H-6555 Lockwasher beneath DVR Terminals 7, 20, 22, 24, 44, and 45. Refer to Illustration 3.
Illustration 1. VR3 Voltage Regulator
Illustration 2. VR6B Voltage Regulator
Illustration 3. DVR Voltage Regulator
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