2006/08/14 Caterpillar

Track Feller Buncher:

TK711 (S/N: 1011-213)

TK721 (S/N: 1021-213)

TK722 (S/N: 1031-216)

TK732 (S/N: 1041-201)

TK741 (S/N: 2021-192)

TK751 (S/N: 3011-261)

TK752 (S/N: 3021-337)

1090 (S/N: BZJ1-206)

1190 (S/N: BZK1-206)

1190T (S/N: BZL1-208)

1290T (S/N: BZM1-207)

Description of Change:

Illustration 1	g01298133

A new saw pump is used on the Track Feller Buncher models that are listed above. The new saw pump has been improved in order to increase the reliability of the pump. These improvements include the following:

• an improved shaft seal

• a center support for the piston slipper

• a thicker slipper retainer

• increased clearances in the bores

Also, a cross-drilled nylon insert has been added in order to prevent the servo piston from loosening.

Adaptable To: The new 268-8259 Piston Pump Gp has replaced the former 218-2977 Piston Pump Gp. The new pump is adaptable to the machines that are listed above. The new pump is effective with the machines that are listed in Table 1.

Table 1

Model Number	Serial Number
TK711	S/N:101245-UP
TK721	S/N:102345-UP
TK722	S/N:103217-UP
TK732	S/N:104202-UP
TK741	S/N:202193-UP
TK751	S/N:301262-UP
TK752	S/N:302338-UP
1090	S/N:BZJ207-UP
1190	S/N:BZK1220-UP
1190T	S/N:BZL1320-UP
1290T	S/N:BZM208-UP

The saw pump on Wheel Feller Bunchers has also been improved. The saw pump on these machines should be replaced with a 262-4420 Piston Pump Gp that has a date code of L11U049 ( 11December 2005) or later. Refer to Table 2 for a description of the date code.

Table 2

First Position	Second and Third Positions	Fourth Position	Fifth Position through Seventh Position
A= January	The numbers in these positions indicate the day of the month.	T= 2004	Sequence number
B= February
C= March
D= April
E= May		U= 2005
F= June
G= July
H= August
I= September		V= 2006
J= October
K= November
L= December