New Main Hydraulic Control Valve Section Centering Spool Spring Is Now Used on Certain Wheel Feller Bunchers {5051} Caterpillar


New Main Hydraulic Control Valve Section Centering Spool Spring Is Now Used on Certain Wheel Feller Bunchers {5051}

Usage:

2670C B3E
Wheel Feller Buncher
2470C (S/N: W471-114)
2570C (S/N: W571-128; F1B1-216)
2570D (S/N: D251-120)
2670C (S/N: W671-154; B3E1-1470)
2670D (S/N: D261-223)
553C (S/N: W531-170; PGR1-277)
563C (S/N: W631-320; JCB1-324)
563D (S/N: D631-191)
573C (S/N: W731-248; RJT1-296)
573D (S/N: D731-255)

Description Of Change: New control valve centering spool spring is now used on all valve sections of the main hydraulic control valve assembly on the machines listed above. The new valve spool centering spring is made of an improved material to improve durability.

Adaptable To: The following part is adaptable to the machines within the listed serial numbers, and is effective with all machines after the listed serial numbers.



Illustration 1g06395522
Control valve group
(1) 529-7729 Spool Spring

Table 1
Required Parts 
Item  Qty  New Part Number  Part Name  Former Part Number(1) 
529-7729  Spool Springs  448-8113 
(1) The former part number listed is for reference only and may differ.

Caterpillar Information System:

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