An Improved Winch Group is Now Used on Certain PL72 Pipelayers {5401} Caterpillar


An Improved Winch Group is Now Used on Certain PL72 Pipelayers {5401}

Usage:

PL72 P72
Pipelayer
PL72 (S/N: P721-UP; P731-UP)

Description Of Change: A new winch group is now used on the machines listed above. The new winch group uses an improved winch frame that has a lower boom block plate assembly welded to the winch frame resulting in improved service life.

Adaptable To:

------ WARNING! ------

Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.


The new 556-6370 Pipelayer Winch Group is adaptable to all machines listed above.


Illustration 1g06361370
(1) Winch Frame
(2) Lower Boom Block Plate Assembly
(3) Boom Winch Group
(4) Hook Winch Group

Table 1
Required Parts 
Item  Qty  Part Number  Part Name  Former Part Number 
556-6370  Pipelayer Winch Group  448-4520 
Sub Assembly Parts 
556-6371  Winch Base Group  N/A 
559-2127  Hook Winch Group  N/A 
559-2128  Hook Winch Group  N/A 
52  8T-4122  Hard Washer 
52  7X-0346  Bolt 
The new pipelayer winch group (1) replaces the existing 448-4520 Pipelayer Winch Group.

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