Loss of Nitrogen Precharge in Rear Suspension Group on Certain Off-Highway Trucks{7201, 7213} Caterpillar

Off-Highway Truck:

770 (S/N: M7W1-UP; BZZ1-UP)

772 (S/N: RLB1-UP; J2M1-UP; 11S1-UP; 80S1-UP)

777G (S/N: TNM1-UP; RDR1-UP; T4Y1-UP)

Quarry Truck:

773G (S/N: MWH1-UP; JWS1-UP; T5S1-UP; T5T1-UP)

775E (S/N: DTE1-UP)

775G (S/N: RFM1-UP; MJS1-UP; T5W1-UP)

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

The nitrogen precharge may leak from the rear suspension group when the payload monitoring sensor is removed on some Off-Highway Trucks and Quarry Trucks.

Solution

If you remove the 266-1962 Plug or 221-3417 Pressure Sensor Gp from the 335-6356 Cylinder As used in the 335-6354 Rear Suspension Gp , the nitrogen precharge will have to be checked to confirm conformance.