Noisy Steering Pilot Valve{4322, 5069, 5117} Caterpillar

Landfill Compactor:

826G Series II (S/N: AYH1-UP)

826H (S/N: AWF1-UP)

836G (S/N: BRL1-UP)

836H (S/N: BXD1-UP)

Load Haul Dump:

R1300G Series II (S/N: RSL1-UP)

R1300G (S/N: LJB1-UP)

R1600G (S/N: 9PP1-UP; 9YZ1-UP)

R1700G (S/N: SBR1-UP; 8XZ1-UP)

R2900G (S/N: GLK1-UP; JLK1-UP)

Wheel Dozer:

834G (S/N: BPC1-UP)

834H (S/N: BTX1-UP)

854G (S/N: A4W1-UP)

854K (S/N: 2211-UP)

Wheel Loader:

988G (S/N: BNH1-UP; 2TW1-UP)

988H (S/N: BXY1-UP)

990 Series II (S/N: BCR1-UP)

992G (S/N: 7HR1-UP; AZX1-UP; ADZ1-UP)

994F (S/N: 4421-UP)

Introduction

The problem that is identified below has an interim solution. Use the interim solution that is identified below.

Problem

The 139-3544 Relief Valve Gp (STEERING, IMPLEMENT PILOT) on the above listed machines may produce a high pitched squeal when the direction is changed with the STIC steering control lever.

Solution

Caterpillar is investigating a potential reduction in steering pilot pressure with time as the root cause. The dealer should check the existing 139-3544 Relief Valve Gp (STEERING, IMPLEMENT PILOT). The dealer should now make any necessary adjustments. The valve should be adjusted to 2400 kPa (350 psi). Any necessary adjustment procedures are contained in the following:

• R1300G LJB Systems Operation and Testing and Adjusting, RENR6935, "R1300G Load Haul Dump Steering System"

• R1300G Series II RSL Systems Operation and Testing and Adjusting, RENR8589, "R1300G Series II Load Haul Dump Steering System "

• R1600G 9PP Systems Operation and Testing and Adjusting, RENR7836, "R1600G Load Haul Dump Steering System "

• R1600G 9YZ Systems Operation and Testing and Adjusting, KENR8500, "R1600G Load Haul Dump Steering System"

• R1700G 8XZ Systems Operation and Testing and Adjusting, RENR4664, "R1700G L.H.D. STEERING SYSTEM "

• R1700G SBR Systems Operation and Testing and Adjusting, KENR6262, "R1700G L.H.D. STEERING SYSTEM "

• R2900G GLK Systems Operation and Testing and Adjusting, RENR7811, "R2900G Load Haul Dump Steering System "

• R2900G JLK Systems Operation and Testing and Adjusting, RENR8555, "R2900G Load Haul Dump Steering System "

• 826G Series II AYH Testing and Adjusting, RENR6032, "824G Series II Wheel Tractor, 825G Series II Soil Compactor and 826G Series II Landfill Compactor Steering System "

• 826H AWF Testing and Adjusting, RENR8693, "824H Wheel Dozer, 825H Soil Compactor and 826H Landfill Compactor Steering System "

• 834G BPC 836G BRL Testing and Adjusting, RENR2186, "834G Wheel Tractor and 836G Landfill Compactor Steering System "

• 834H BTX 836HBXD Testing and Adjusting, RENR6362, "834H Wheel Dozer and 836H Landfill Compactor Steering System "

• 992G AZX, ; ADZ, ; 7HR 854G A4W Testing and Adjusting, SENR1373, "992G Wheel Loader and 854G Wheel Dozer Steering System "

• 854K 221 Testing and Adjusting, RENR8932, "992K Wheel Loader and 854K Wheel Dozer Steering System "

• 988H 2TW, ; BNH Systems Operation and Testing and Adjusting, RENR3099, "988G Wheel Loader Steering System "

• 988H BXY Testing and Adjusting, RENR6212, "988H Wheel Loader Steering System "

The technician should document the findings in the sequential order below:

• Machine serial number

• Service hours

• Existing pilot pressure

• Approximate number or turns on adjustment screw

• Pilot pressure after adjustment

All findings should be reported: