O-Rings Failing In Accumulator Charging Valve For Cartridge Groups Caterpillar

O-Rings Failing In Accumulator Charging Valve For Cartridge Groups

Usage:

OFF-HIGHWAY TRUCKS793B (1HL),
793C (4AB) OFF-HIGHWAY TRUCKS

Problem:

The seals in the "Cutout" cartridge are failing due to heat.

Solution:

Replace Buna-N seals with Viton seals used with 120-5315 Cartridge Group for 120-4622 Valve Group-Accumulator Charging, and 139-9049 Cartridge Group for 139-9048 Valve Group-Accumulator Charging. Replace former back-up rings with new back-up rings.

Caterpillar Information System:

Idler Stub Shaft Mounting Bolts; Idler Gear Sleeve Bearings Idler Stub Shaft Mounting Bolts; Idler Gear Sleeve Bearings

Grease Fittings May Have Been Over Tightened On Automatic Lubrication Injectors Grease Fittings May Have Been Over Tightened On Automatic Lubrication Injectors

Idler/Bogie Roller Bearings Idler/Bogie Roller Bearings

The Transmission Control May Log An Erroneous Service Code For The Starter Relay (Service Code: MID 081, CID 638, FMI 05) The Transmission Control May Log An Erroneous Service Code For The Starter Relay (Service Code: MID 081, CID 638, FMI 05)

Propel Pump Drive Hubs Propel Pump Drive Hubs

Backhoe Loader Booms Backhoe Loader Booms

All Wheel Steer, Loader Lift / Steer Interaction All Wheel Steer, Loader Lift / Steer Interaction

Lower Alternator Mounting Bracket Lower Alternator Mounting Bracket

Improvements Made To 1G4704 Grip Assembly Improvements Made To 1G4704 Grip Assembly

Over Tightened Clamps On Engine Air Inlet Lines Over Tightened Clamps On Engine Air Inlet Lines

Interference Between New High Pressure Turbocharger Groups And Turbocharger Oil Lines And Turbocharger Water Lines Interference Between New High Pressure Turbocharger Groups And Turbocharger Oil Lines And Turbocharger Water Lines

Automatic Transmission Fluid (ATF) Is Not An Acceptable Lubricant For Flexxaire Fans Automatic Transmission Fluid (ATF) Is Not An Acceptable Lubricant For Flexxaire Fans

Carriage Rotate Pins Can Be Protected From Damage By Adding A Restraint Carriage Rotate Pins Can Be Protected From Damage By Adding A Restraint

Specifications Manual For 777D Off-Highway Trucks - Form no. SENR6911 - May 1996 Specifications Manual For 777D Off-Highway Trucks - Form no. SENR6911 - May 1996

Assembly Procedure For 777D Off-Highway Trucks - Form no. SEHS9997 - October 1996 Assembly Procedure For 777D Off-Highway Trucks - Form no. SEHS9997 - October 1996

Remanufacturing Water Pumps For The 3300 Family Of Engines Remanufacturing Water Pumps For The 3300 Family Of Engines

Some 9X-7803 Alternators Were Mislabeled As 8C-6163 Some 9X-7803 Alternators Were Mislabeled As 8C-6163

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Tilt Cylinders May Form A Void During Some Applications Tilt Cylinders May Form A Void During Some Applications

Excessive Oil Leakage From Hydraulically Actuated Electronic Unit Injectors (Heui) Excessive Oil Leakage From Hydraulically Actuated Electronic Unit Injectors (Heui)

Do Not Wash Fuel Pump With Cold Water Do Not Wash Fuel Pump With Cold Water

Activating The Transmission Neutralizer Function Activating The Transmission Neutralizer Function

Transmission Drain Plug Access Transmission Drain Plug Access