AFTER FAILURE ONLY - PSP FOR REPLACING THE TRACK ADJUSTER GROUP ON CERTAIN 320 EXCAVATORS - COSA LETTER NO. 2 - PS0815 - MAI LED COSA Caterpillar

HEBE1428
January 31, 1995
COSA LETTER No. 2
***************** PRODUCT SUPPORT PROGRAM FOR REPLACING THE
* after failure * TRACK ADJUSTER GROUP ON CERTAIN 320
* only * EXCAVATORS
*****************
4157   PS0815
NOTE: This Program can only be administered after a
failure occurs. The decision whether to apply the
Program is made by the dealer. When reporting the
repair, use "PS0815" as the Part Number, "7755" as
the Group Number, and "96" as the Warranty Claim
Description Code.

January 31, 1996

In some applications, the track adjuster of certain 320
Excavators may seize, resulting in the impossibility to adjust
the track tension.

Model Identification Number
320 4ZJ1-620
320L 3XK1-2167
320N 9WG1-1191

1 - 7Y1780 Cylinder
1 - 7Y1687 Piston
1 - 964276 Ring
1 - 951701 Seal
2 - 951612 Seal
2 - 931515 Ring
2 - 964275 Ring
1 - 931435 Seal

Replace the seized piston and cylinder with new ones. Change the
related seals. During the reassembly of the adjuster, thoroughly
grease the piston outside diameter, the cylinder inside diameter,
and the seal grooves (see Illustration attached).
To avoid air in the bottom of the cylinder or in the piston
fill-relief hole (see Illustration - Notes D and E), fill the
cylinder with grease, so that the grease comes out through the
fill-relief piston hole during assembly.

Product AVSpare Dealer Suggested Customer Suggested
smu/age Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
whichever (D/N) (Cost)  (C/L) (Sell)
comes
first
0-3000 100 % 7 0 0 0  0
0-24 mo.
3001-5000 33 1/3 % 3.5 0 3.5 50% 0
25-36 mo.

Handle the parts in accordance with your Warranty Bulletin on
warranty parts handling.
Attachment
1-Illustration