BUCKET AS 5411798 - Caterpillar

****Affected Product****
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
COPY OF OWNER NOTIFICATION FOR U.S. AND CANADIAN OWNERS
XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999
SAFETY - PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE BOOM LOWERING CHECK VALVES
MODELS INVOLVED - 312C, 315C, 318C, AND 319C EXCAVATORS
Dear Caterpillar Product Owner:
The Boom Lowering Check Valves need to be reworked on the products listed below. In case of failure of the return hose between the BLCV and the main control valve, some BLCVs may have a closure time that exceeds the maximum value allowed in the ISO 8643 regulation which may cause personal injury or death. You will not be charged for the service performed.
Contact your local Caterpillar dealer immediately to schedule this service. The dealer will advise you of the time required to complete this service.
Please refer the dealer to their Service Letter dated 16Aug2007 when scheduling this service.
We regret the inconvenience this may cause you, but urge you to have this service performed for your added safety and satisfaction.
Caterpillar Inc.
Identification #(s)
Attached to 16Aug2007 Service Letter
Rework Procedure
See Image 1.1.1 for an overall view of the complete rework procedure.
Image1.1.1
SAFETY OPERATIONS PRIOR TO BLCVS' REWORK PROCEDURE:
1) Place the machine on flat level ground.
2) Fully retract the stick cylinder rod. Adjust the position of the bucket so
that the bucket is parallel to the ground. Lower the boom until the bucket is
flat on the ground - See Image 1.2.1
3) Stop the engine.
4) Release the pressure in the boom down hydraulic circuit. Refer to RENR6690
Testing & Adjusting Section, "Hydraulic System Pressure - Release Of Hydraulic
Pressure From A Single Hydraulic Circuit".
Image1.2.1
DISASSEMBLY PROCEDURE:
5) Loosen the 211-4182 Plug (item n? 15).
6) Slowly remove the 211-4182 Plug to collect the following parts:
a) 4J7386 and/or 211-7944 shims (item n?23 and/or 2). Carefully handle the exact quantity of shims which must be reused later at step 8 (the shims may remain inside the 211-4182 Plug and/or onto the face of the 211-4181 Guide (item n?14).
Note: Use a degreasing agent and a magnet pen tool to help remove the remaining shims from the plug.
b) 211-4181 Guide (item 14).
c) 211-4183 Spring (item 16). Carefully handle this spring which must be reused
step at 10.
d) 211-4184 Retainer (item n?17) and 211-4185 Poppet (item n?18).
e)For Group 1 and 2 only:
211-6146 Poppet (item n?25).
For Group 3 and 4:
211-4186 Poppet(item n?25).
f) Pin part of 294-4473 Guide Assmebly (item n?19). Carefully handle the pin which
must be reused at step 12.
Image1.3.1
ASSEMBLY PROCEDURE:
7) Install the new 4K1388 Seal-O-Ring onto the new 311-1906 Plug (replacement of item 15)).
8) For Group 1, 3 and 4:
Insert all the shims formely removed (step 6) inside the new 311-1906 Plug.
For Group 2 only:
Insert all the shims formely removed (step 6) and one 4J7386 Shim inside the new 311-1906 Plug.
9) Place the new 311-1912 Guide (replacement of item 14) inside the new 311-1906 Plug.
10) Install the former 211-4183 Spring removed (step 6) onto the new 311-1912
Guide.
11) Keep this assembly for later use - See Image 1.4.1
Image1.4.1
12)For Group 1 and 2 only:
Place the Pin (item n?19) into the