WIRE- 1326884 - Caterpillar

Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below. Problem
When the operator performs a quick movement of the stick, a slight delay can be felt. The pilot pressure to open the stick lowering control valve (SLCV) is raised up with delay due to long hose routingSolution
Install a 233-7881 Check Valve in the SLCV pilot line. Refer to the rework procedure that follows.Rework Procedure to Add a 233-7881 Check Valve in the Pilot Line of the Stick Lowering Control Valve
Safety
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Do not operate or work on this machine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Caterpillar dealer for replacement manuals. Proper care is your responsibility.
Required Parts
Table 1
Required Parts    
Qty    New Part Number    Part Name    Description    
1     233-7881     Check Valve        
1     3J-1907     O-Ring Seal     SAE 9/16-18    
1     3J-7354     O-Ring Seal     SAE 7/16-20    
1     4I-6287     Coupling        
1     6V-8397     O-Ring Seal     SAE 11/16-16    
1     6V-9872     Connector     ORFS TO STOR    Installation Procedure
Illustration 1 g00104545
Attach a "Do Not Operate" warning tag or a similar warning tag to the start switch or to the controls before you service the equipment or before you repair the equipment. These warning tags (Special Instruction, SEHS7332) are available from your Caterpillar dealer.
Illustration 2 g02346857
Location to add the check valve on the pilot line
Illustration 3 g02347003
(1) 148-8326 Connector As (2) 233-7881 Check Valve (3) 164-5549 Coupling As (4) Port aL3Install the 233-7881 Check Valve on port aL3 (4).
Illustration 4 g02348520
Illustration 5 g02348521