2009/03/16 Caterpillar


New Software Is Available for Preventing Failures of the Thumb Cylinder on Certain Excavators {5701, 7610, 7620}

Usage:

325D L A3R
Excavator:
320C (S/N: ANB1-UP; MAB1-UP; PAB1-UP; AMC1-UP; MAC1-UP; PAC1-UP; EAG1-UP)
320D (S/N: PHX1-UP)
321D (S/N: NAS1-UP)
322C (S/N: BKJ1-UP; HEK1-UP)
324D (S/N: LAB1-UP; JJG1-UP)
325C (S/N: CRB1-UP; BTD1-UP; BFE1-UP; BMM1-UP; BKW1-UP)
325D (S/N: PAL1-UP; A3R1-UP; SCR1-UP)
328D (S/N: GTN1-UP)
329D (S/N: MNB1-UP; JHJ1-UP)
330C (S/N: CYA1-UP; KDD1-UP; JNK1-UP; CAP1-UP; GKX1-UP; DKY1-UP)
330D (S/N: NBD1-UP; B6H1-UP; THJ1-UP; MWP1-UP; HAS1-UP)
336D (S/N: PRF1-UP; W3K1-UP)
Service Magazine SEPD1608, 13 May 2013, "New Software Is Available for Preventing Failures of the Thumb Cylinder". Disregard this article. See the article that follows.

The new software in Table1 is available for the direct replacement of the former software on the models that are listed. The new software is adaptable to machines that are configured with Tool Control System 14 and a hydraulic thumb.

External force on the thumb cylinder creates excessively high pressure in the hydraulic system. The setting for the relief valve controls the line relief pressure for the thumb cylinder. The new software keeps the relief valves activated in the tool control system for the thumb cylinder. The new software prevents failures of the thumb cylinder.

Install the new software if your machine is configured with Tool Control System 14 and a hydraulic thumb. The new software is available in the form of a flash file through Caterpillar Service Information System (SIS).

Note: To obtain the correct software, use the "Flash Filename" search tool. Refer to Table 1 for the software part number. Searching by machine Serial Number Prefix alone may not find the software listed.

Table 1
New Software    
Model     New Part Number     Former Part Number    
320C     309-5809     211-5559    
322C     309-5810     211-5567    
325C     309-5811     211-5577    
330C     309-5812     211-5552    
320D     309-5813     309-5758    
321D     327-7480     327-7430    
324D     309-5814     309-5715    
325D/329D     309-5815     309-5721    
328D     327-7481     327-7498    
330D     309-5816 (1)
327-7537 (2)    
297-4427    
336D     327-7424     309-5816    
( 1 ) Use this software with NBD841-UP, B6H631-UP, THJ307-UP, MWP2132-UP, and HAS1-UP.
( 2 ) Use this software with NBD1-840, B6H1-630, THJ1-306, and MWP1-2131.

Caterpillar Information System:

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