1998/05/04 Caterpillar

New Load Sensing Signal Relief Valve Prevents Wear Between Load Piston And Housing{5117}

Usage:

5130 (5ZL),
5130B (4CS),
5230 (7LL) Excavators

New 155-8404 Load Sensing Signal Relief Valve (B) is a direct replacement for former 112-3299 Load Sensing Signal Relief Valve (C) in implement control valves for the following machines:

* 5130 128-6981 Valve

* 5130B 146-0013 Valve & 146-0014 Valve.

* 5230 128-6980 Implement Control Valve Group.

The piston (4) in the former 112-3299 Load Sensing Signal Relief Valve (C) could rotate, causing wear to the housing. New 155-8404 Load Sensing Signal Relief Valve (B) uses 9J-5491 Spring (3) to prevent rotation of piston (4).

Typical Implement Control Valve

(B) New 155-8404 Load Sensing Signal Relief Valve.

(3) 9J-5491 Spring.

(4) Piston.

(C) Former 112-3299 Load Sensing Signal Relief Valve.

(1) Adapter.

(2) Adjuster.

(4) Piston.

Former 112-3299 Load Sensing Signal Relief Valve (C) can be upgraded, by installing 9J-5491 Spring (3), as follows:

1. Remove adapter (1) from adjuster (2) in former 112-3299 Load Sensing Signal Relief Valve (C).

2. Install 9J-5491 Spring (3) into adjuster (2).

3. Install adapter (1) and tighten to a torque of 150 ± 15 N·m (110 ± 11 lb ft).

4. Adjust track and implement pressures per "Test and Adjust" Service Manual Module.

Caterpillar Information System:

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

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

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

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

1998/04/27 New Hardened Sleeve For Load Check Valve In Control Valve For Stick Circuit Improves Service Life {5067}

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}

1998/05/04 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}

1998/05/18 Entertainment Radios Improved With Increased Reliability {7338}

1998/05/25 New Main Pump Group Creates New Specifications For Service Manual Module SENR8961 {5050,0372}

1998/05/25 New Main Pump Group Creates New Specifications For Service Manual Module SENR8971 {5050,0372}

1998/05/25 New Ether Starting Aid Group Used {1456}

1998/05/25 New Valve Cover Seal Used {1107}