2011/05/19 Caterpillar


Updated Oil Viscosities will Extend the Service Life of the Brakes on M-Series Motor Graders {4062, 4064, 4251, 4267, 7000, 7581}

Usage:

120M B9C
Motor Grader:
120M (S/N: B9C1-UP; B9N1-UP; B9W1-UP; D9W1-UP)
12M (S/N: B9F1-UP; B9R1-UP)
140M (S/N: B9D1-UP; B9G1-UP; D9G1-UP; B9M1-UP)
14M (S/N: B9J1-UP; R9J1-UP)
160M (S/N: B9E1-UP; B9L1-UP; B9T1-UP; D9T1-UP)
16M (S/N: B9H1-UP; R9H1-UP)
24M (S/N: B9K1-UP)
Service Magazine SEPD1183, 27 September 2010, "Updated Oil Viscosities will Extend the Service Life of the Brakes on M-Series Motor Graders". Disregard this article. See the article that follows.

ReferenceService Magazine, SEPD1181, "A Service Brake Modification is Now Available for Certain M Series Motor Graders"

ReferenceService Magazine, SEPD1173, "Service Brake Repair Procedure for Certain Series M Motor Graders is Now Available"

ReferenceOperation and Maintenance Manual, SEBU7880, "120M and 12M Motor Graders", "Lubricant Viscosities"

ReferenceOperation and Maintenance Manual, SEBU7881, "140M Motor Grader", "Lubricant Viscosities"

ReferenceOperation and Maintenance Manual, SEBU7883, "14M Motor Grader", "Lubricant Viscosities"

ReferenceOperation and Maintenance Manual, SEBU7882, "160M Motor Grader", "Lubricant Viscosities"

ReferenceOperation and Maintenance Manual, SEBU7884, "16M Motor Grader", "Lubricant Viscosities"

ReferenceOperation and Maintenance Manual, SEBU7990, "24M Motor Grader", "Lubricant Viscosities"

ReferenceOperation and Maintenance Manual, SEBU6250, "Caterpillar Machine Fluids Recommendations", "Motor Graders"

The machines that are listed above have updated requirements for the lubrication viscosities for the tandem oil. The lower viscosities will extend the service life of the brakes by preventing overheating and other failures.

Table 1
Motor Graders Lubricant Viscosities for Ambient Temperatures    
Compartment or System     Oil Type and Performance Requirements     Oil Viscosity Grade     °C     °F    
Min Max     Min     Max    
Tandem Drive and Wheel Spindle Bearings     Cat TDTO
Cat TDTO-TMS
Cat Cold Weather TDTO
Cat TO-4, Cat TO-4M    
SAE 0W-20     −40     10     −40     50    
SAE 10W −20     20     −4     68    
SAE 30 −10     40     14     104    
SAE 50 10     50     50     122    
Cat TDTO-TMS −20     43     −4     109    

Refer to Table 1. The temperature range in which the oil of a given viscosity is suitable for use in the tandem drive is being revised upward. The information in Table 1 for the lubrication of the tandem drive and wheel spindle bearings will be added to publications that affect each machine. The information will be added to the Operation and Maintenance Manuals for the above listed machines and to Operation and Maintenance Manual, SEBU6250, "Caterpillar Machine Fluids Recommendations", "Motor Graders". Use the lowest viscosity that is recommended in the Operation and Maintenance Manual for your machine at the current ambient temperature. Add the appropriate amount of 1U-9891 Hydraulic Oil Additive to the tandem oil.

Note: 1U-9891 Hydraulic Oil Additive is not to be used in 24M Motor Graders.

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