PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE STICK LOWERING CHECK VALVE ON CERTAIN 315C EXCAVATORS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE STICK LOWERING CHECK VALVE ON CERTAIN 315C EXCAVATORS [REBE2544]

HYDRAULIC SYSTEM

VALVE GP-CHECK & RELIEF

PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE STICK LOWERING CHECK VALVE ON CERTAIN 315C EXCAVATORS

REBE2544-00

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27Sep2007

O-424

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*Safety*	PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE STICK LOWERING CHECK VALVE ON CERTAIN 315C EXCAVATORS
5067 5117 5147 5811		PI10633

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NOTE:

This Program must be administered as soon as possible. When reporting the repair, use "PI10633" as the Part Number and "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code.
Exception: If the repair is done after failure, use "PI10633" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

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PROBLEM

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The 214-6223 Stick Lowering Check Valve (SLCV) located on the stick cylinder needs to be reworked on certain 315C Excavators. In case of a failure of the return hose between the SLCV and the main control valve, the SLCVs reworked according to the former PS42302 may have a delay prior to closure which may cause personal injury or death.

AFFECTED PRODUCT

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Model	Identification Number
315C	ANF00174, 251, 429, 460, 552, 762, 772, 789, 794-795, 797, 824, 839, 866, 875, 890

PARTS NEEDED

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Qty	Part Number	Description
1	4K1388	SEAL-O-RING
1	3110010	POPPET
1	3111876	VALVE
1	3111906	PLUG
1	3111912	GUIDE

ACTION REQUIRED

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Refer to the attached Rework Procedure.

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OWNER NOTIFIAVSION

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U.S. and Canadian owners will receive the attached Owner Notification.

SERVICE CLAIM ALLOWANCES

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AVSpare		Dealer Suggested		Customer Suggested
Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
100%	100%	0%	0%	0%	0%

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NOTE: This is a 0.5-hour job

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PARTS DISPOSITION

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Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

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COPY OF OWNER NOTIFIAVSION FOR U.S. AND CANADIAN OWNERS

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

SAFETY - PRODUCT IMPROVEMENT PROGRAM FOR REWORKING THE STICK LOWERING CHECK VALVE

MODELS INVOLVED - 315C EXCAVATORS

Dear AVSpare Product Owner:

The 214-6223 Stick Lowering Check Valve (SLCV) located on the stick cylinder needs to be reworked on certain 315C Excavators. In case of a failure of the return hose between the SLCV and the main control valve, there may be a delay prior to closure which may cause personal injury or death. You will not be charged for the service performed.

Contact your local AVSpare 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 27Sep2007 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.

AVSpare Inc.

Identification #(s)

Attached to 27Sep2007 Service Letter

Rework Procedure

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See Image 1.1.1 for an overall view of the complete rework procedure.

Image1.1.1

SAFETY OPERATIONS PRIOR TO SLCVS' REWORK PROCEDURE:
1) Place the machine on flat level ground.

2) Raise the boom. Fully extend the bucket cylinder rod. FULLY EXTEND THE STICK CYLINDER ROD (this stick-in motion minimizes the residual pressure in the SLCV for the rework). Rest the implement on the ground by lowering the boom - See Image 1.2.1

3) Stop the engine.

4) Release the pressure in the stick-in 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 and 4K1388 Seal-O-Ring(item 15 & 35).

6) Slowly remove the 211-4182 Plug to collect the following parts:
a) 4J7386 and/or 211-7944 shims (item 2 and/or 22). 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 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 17) and 211-4185 Poppet (item 18).
e) 222-6146 Poppet (item 25).
f) Pin part of 294-4473 Guide Assmebly (item 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) Insert all the shims formely removed (step 6) 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)Place the Pin (item 19) into the new 311-0010 Poppet and install this
assembly into the valve.
Note: Be careful, the grooves of the pin must be oriented upward. Do not
orientate the grooves on the Poppet side - See Image 1.5.1

13) Insert the new 311-1876 Poppet inside the bore of the new 311-0010 Poppet.

Image1.5.1

14) Install the plug assembly obtained in step 11 into the valve.

15) Tighten the 311-1906 Plug to a torque of 190 +/- 19 Nm.

16) Start the engine.

17) Move the joystick to raise the boom 1 meter off the ground.

18) Slowly move the joystick for stick-in and stick-out operations 10 times to purge the air.