1998/04/06 Caterpillar

Improved Duct Assembly Enhances Air Conditioning Of Cab {7309,7320}

Usage:

311B (8GR, 8HR, 2LS, 2MS),
312B (9GR, 9HR, 2NS, 3ES),
312B L (8JR, 3FS),
315B (1SW),
315B L (3AW),
320B (3MR, 5BR, 1CS, 4FS),
320B L (4MR, 6CR, 5CS, 4EW),
320B N (4NR),
322B (8MR, 3NR),
322B L (1AS, 5CR, 8NR),
325B (8GM, 8PR),
325B L (7EN, 8RR, 1GS),
330B (8SR, 9HN),
330B L (2RR, 8TR, 1JS),
345B (2ZW, 6MW, 8KW),
345B L (3MW, 4SW, 8RW, 9CW) Excavators

Description of Change: The duct assembly which directs cooled air from the air conditioner into the cab now features improved connecting joints. These joints provide a tighter seal at each duct junction to prevent cooled air leakage. With more cooled air reaching the cab, the air conditioner performs more efficiently and operator comfort is improved.

Adaptable To: The improved 124-3982 Duct Assembly is effective with and adaptable to the machines listed in the chart.

(A) Duct assembly.

(B) Duct joints which were improved.

Caterpillar Information System:

1998/04/06 Carbody Side Plates Reinforced To Increase Service Life {7062}

1998/04/06 Further Improvements To Retention System For Excavator Tips And Couplers {6500,6515,6537,6800}

1998/04/06 New Butyl Cab Mount Used To Reduce Cab Vibration {7260}

1998/04/06 Track Roller Break In And Travel Procedures {4154,4159,4180}

1998/04/06 New Line Relief Valve Prevents Seal Failure And Loss Of Line Relief Valve Pressure {5080,5090,5117}

1998/04/06 Magnet Used To Secure Electric Panel Door During VIMS Real Time Analysis Procedure {1417,7301}

1998/04/06 Spools And Valves In The Main Hydraulic Control Valve Are Now Serviceable {5051}

1998/04/06 Support Plates Improve Track Frames {4151,4154}

1998/04/06 New Push Rods In The Pilot Control Valve Improve Service Life {5059,5465,5466}

1998/03/30 Service Interval Change For Balderson/Caterpillar Hydraulic Hammers {5488}

1998/03/30 Use 136-3642 Crimp Tool Group For 4C-9900 And 6V-4900 Presses {5057}

1998/03/30 Use 1U-6189 Lamp Tool For Removal And Installation Of Small Control Panel Bulbs {1400,0709}

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

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

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

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}

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

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

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 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}

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

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

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