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Wiper Interval Relay failures On Wheeled Excavators Caterpillar


Wiper Interval Relay failures On Wheeled Excavators

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Wiper Interval Relay failures On Wheeled Excavators

CONFIDENTIAL TIBU4248-00
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TECHNICAL INFORMATION BULLETIN

May 12, 2004

PRODUCT FAMILY(S)

M312 (6TL951-Up)

M313C (BDR1-548)

M315 (7ML1647-Up)

M315C (BDM1-666)

M316C (BDX1-726)

M318 (6ES243-Up, BMD1-Up, 8AL2265-Up,

8SS470-Up,

M318C (BCZ1-809, BEB1-240)

M320 (6WL469-Up, 9PS287-Up)

M322C (BDK1-360, BDY1-342)
 

Component Code(s) 7426

SUBJECT: Wiper Interval Relay failures On Wheeled Excavators.

PROBLEM:

There are reports of failures with the 155-4574 Relay Assembly. The cause for the failures has been related to shorts and open circuits.

SOLUTION:

The 155-4574 Relay Assembly has been replaced with the new 248-7372 Relay Assembly. The timer relay is part of the wiper circuit for B-Series and C-Series Wheeled Excavators, and is also used for the swing brake on the B-Series Wheeled Excavators. See illustration 1 for details about the relay assembly.

  1. Location of the two 248-7372 Relay Assemblys on M300 Series Wheeled Excavators.
  2. Location of the 248-7372 Relay Assembly on M300 C-Series Wheeled Excavators.

 

 

COPYRIGHT 2004 CATERPILLAR
ALL RIGHTS RESERVED

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