1998/04/27 Caterpillar

New Hardened Sleeve For Load Check Valve In Control Valve For Stick Circuit Improves Service Life {5067}

Usage:

320 (4ZJ, 7GJ, 3RK, 7WK, 8LK, 2DL, 3XM),
320 L (8HJ, 3XK, 4BK, 9KK, 1KL, 1TL, 4JM),
320 N (9WG, 1XM),
320 S (6KM),
322 (7WL),
322 L (8CL, 8ML, 9RL),
322 LN (4RM),
322 N (9JL),
325 (7TG, 8JG, 9SG, 5WK, 8YK, 9ZK, 8NL, 6RM),
325 L (7CJ, 7LJ, 9KL, 6KK, 8NK, 2SL, 7LM),
325 LN (3LL, 2SK),
325B L (2JR, 6DN, 8RR),
330 (9NG, 9PJ, 9WJ, 6ZK, 8RL, 2ZM),
330 L (6WJ, 6SK, 2EL, 8FK, 9ML, 5YM),
330 LN (8CK) Excavators

Description of Change: A new, hardened sleeve for the load check valve replaces the former sleeve. The new heat treated sleeve is more resistant to wear and has longer service life.

Adaptable To: New 116-3445 Sleeve (1) replaces the former 6E-3538 Sleeve, effective with 325B L (2JR1, 6DN1, 8RR1) Excavators and is adaptable to the other models listed above.

Typical Control Valve
(1) 116-3445 Sleeve.

Caterpillar Information System:

1998/04/27 New Relief Valves In Main Control Valve Improve Swing Operation {5051,5454}

1998/04/27 New Design Improves Travel Motor Regulator {4351}

1998/04/20 Oil Filter Group Changed To Allow Oil To Be Easily Drained From Oil Lines{1307}

1998/04/20 Oil Filter Group Changed To Allow Oil To Be Easily Drained From Oil Lines{1307}

1998/04/20 Additional Clip In Fuel Injection Lines Groups Helps Secure Advanced Diesel Engine Management (ADEM) I Electronic Control Module (ECM) Fuel Cooling Hose{1252}

1998/04/20 The Swing Bearing In The Bearing And Gear Group Is Improved{7063,5459}

1998/04/20 Improved Ground Engaging Tool (GET) Pin And Retainer Assembly Are Available{6805}

1998/04/20 Optional Valve Spool Kits Are Available For The Pilot Valve Group To Modify The Response Of Implement Controls{5059,5462,5465,5466}

1998/04/13 Improved Rod In Bottom Dump Cylinder Group For Bucket {5457}

1998/04/13 Correction To Service Manual Modules SENR6059 And SENR1371 {7601,7603}

1998/04/13 New Relief Valve For Main Hydraulic System Improves Maintaining Pressure Setting {5069}

1998/04/06 Improved Duct Assembly Enhances Air Conditioning Of Cab {7309,7320}

1998/05/04 Special Instructions Are now Available For Installing Two-Way And Four-Way Pilot Valves{5051,5059}

1998/05/04 New Retaining Ring In Final Drive Motor Group Improves Reliability{5058}

1998/05/04 Serviceable Parts For Hydraulic Pilot System Pump{5073,5085}

1998/05/04 New Rear Glass Assembly Improves Cab Assemblies{7300,7310}

1998/05/04 New Load Sensing Signal Relief Valve Prevents Wear Between Load Piston And Housing{5117}

1998/05/04 Improved Alternator Groups Now Available{1405}

1998/05/04 ROPS Instruction Film Available Through Parts Service{7177,7405}

1998/05/11 Special Instruction, REHS0183, "Removal And Installation Of Tamperproof Caps On A RSV Governor" Is Available {1264}

1998/05/11 A New Switch Used In High Pressure Screens Of Discharge Lines From Hydraulic Pumps Is Resistant To Internal Leakage Of Hydraulic Oil {5050}

1998/05/11 Bolt Pattern Change From Six To Four In Piston And Rod For Bucket And Stick Cylinders Improves Service Life {5457,5458}

1998/05/11 New Engine Lifter Arm Assembly With Crowned Roller Used In Lifter Groups {1209}

1998/05/18 New Final Drive Parts Reduce Gear Play {4051}