Counterbalance Valves Are Now Used on Certain Hydraulic Excavator Forestry Grapples {5362, 5457, 5555, 6307} Caterpillar


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Counterbalance Valves Are Now Used on Certain Hydraulic Excavator Forestry Grapples {5362, 5457, 5555, 6307} [M0068266]
HYDRAULIC SYSTEM
CYLINDER GP
Counterbalance Valves Are Now Used on Certain Hydraulic Excavator Forestry Grapples {5362, 5457, 5555, 6307}
Log Loading Grapple
GLL52B (S/N: GXX1-UP)
GLL55B (S/N: GXY1-UP)
GLL60B (S/N: GXZ1-UP)

Description Of Change: The above listed Hydraulic Excavator Forestry Grapples now use counterbalance valves in place of check valves. The new valves are more robust and are better suited for extreme load applications.

Adaptable To:



Illustration 1g06034771

Table 1
Required Parts 
Item  Qty  New Part Number  Description  Former Part Number 
496-3429  Counterbalance Valve Gp  197-9119 
When replacing the former check valves with the new counterbalance valves, replace both. Also, check for cylinder bypassing. Reseal cylinders is bypassing occurs.

Table 2
Sales Model  Adaptable to  Effective with 
GLL52  S/N:GXX1-322  S/N:GXX323-UP 
GLL55  S/N:GXY1-272  S/N:GXY273-UP 
GLL60  S/N:GXZ1-457  S/N:GXZ458-UP 
The new valve is adaptable to and effective in production with the machines listed in Table 2.

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