ENGINE AR-COMPLETE 1695157 - Caterpillar

PARTS DISPOSITION
Handle the parts in accordance with your WarrantyBulletin on warranty parts handling.MAKE EVERY EFFORT TO COMPLETE THIS PROGRAMAS SOON AS POSSIBLE.Attach. (1-Owner Notification)
(2-Rework Procedure)COPY OF OWNER NOTIFICATION FOR U.S. AND CANADIAN OWNERS
XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999PRIORITY - PRODUCT IMPROVEMENT PROGRAM FORADJUSTING THE LINE RELIEF VALVE PRESSURE SETTINGS FOR THE STICK CYLINDERAND BUCKET CYLINDERMODELS INVOLVED - 320C, 320C L, 322C, AND 325CL EXCAVATORSDear Caterpillar Product Owner:The line relief valve pressure setting forthe stick cylinder and bucket cylinder may not have been adjusted correctlyduring assembly excavators that are equipped for long reach configuration.If the line relief valve pressure setting is incorrectly adjusted, thestick may crack and fail. You will not be charged for the service performed.Contact your local Caterpillar dealer immediatelyto schedule this service. The dealer will advise you of the time requiredto complete this service. Please refer the dealer to their Service Letterdated January 27, 2006 when scheduling this service.We regret the inconvenience this may causeyou, but urge you to have this service performed as soon as possible toprevent unscheduled downtime.Caterpillar Inc.
Identification #(s)Attached to January 27, 2006 Service LetterRework Procedure
Line Relief Valves
Set the pressure of the line relief valve forthe bucket cylinder.
Table 1
Line Relief Valve Adjustmentfor the Bucket Cylinder
Group 1, Group 2, Group 3 & Group4
Bucket Cylinder Extended 19100 1000 kPa (2770 145 psi
Bucket Cylinder Retracted
Set the pressure of the line relief valve forthe stick cylinder.
Line Relief Valve Adjustment for theBoom & Stick Cylinders
Group 1, Group 2, Group 3 & Group4
Stick Cylinder Extended 20100 1000 kPa (2915 145 psi) Make sure that the line relief is setat the correct specification. Hydraulic hoses or welded structures mayfail if the setting is greater than the specification. Check your record to determine if theline relief settings have been checked and readjusted to the above specifications.If so, submit a SIMS ticket to report completion of the letter. No furtheraction is required.Slow Return Valves(Group 1 and Group2 Only)
There is a slow return valve in the hydraulicsystem for the boom cylinder retract. There is a slow return valve in thehydraulic system for the stick cylinder extend. These two valves adjustthe travel speed of the boom and stick.
Check valve (S) adjusts the hydraulic system forthe stick cylinder extend.
Check valve (T), adjusts the hydraulic systemfor the boom cylinder retract.
(V) 70mm Spanner Wrench(X) 50mm Spanner Wrench
In order to adjust the check valve, position spannerwrench (V) at location (U) on the check valve. Position spanner wrench(X) at location (W) on the check valve.
The following adjustment procedurerequires a tape measure and a stopwatch. Position the machine on flat ground.The temperature of the hydraulic oil should be 55° 5°C(131° 9°F). Move the engine speed dial to the 10 position. Boom Cylinder Extended To - (Y) 2.0 m (6.5ft)
Raise the boom to the maximum height.
Measure the amount of time for the movement fromthe boom cylinder extended to a height that is 2.0 m (6.5 ft) from theground. Refer to Table 2 to dertermine the correct time for your machine.
Table 2
Group 1 3.7 0.3 seconds
Group 2, Group 3, Group4 4.2