1988/12/19 Caterpillar


New Circle Drive Gerotor Motor Groups Provide Higher Torque To Circle Drive {5082}

Usage:


120G ( 87V2969-Up ),
130G ( 74V1257-Up ),
140G ( 72V1892-Up, 81V585-Up ),
12G ( 61M4517-Up ),
14G ( 96U5221-Up ),
16G ( 93U2489-Up ) Motor Graders

SUPPLEMENT: 05/08/89

SERVICE MAGAZINE; DECEMBER 19, 1988; PAGE 5; "New Circle Drive Gerotor Motor Groups Provide Higher Torque To Circle Drive" on 120G, 130G, 140G, 160G, 12G, 14G, and 16G Motor Graders. Add the following chart to the article to add new models and identify when the change is effective on the listed models. The adaptable PIN's for the 120G Motor Grader were also listed incorrectly in the original article.

--------------- END SUPPLEMENT ---------------

SUPPLEMENT: 12/10/90

Service Magazine; December 19, 1988; Page 5; "New Circle Drive Gerotor Motor Groups Provide Higher Torque To Circle Drive" for 120G, 130G, 140G, 12G, 14G, 16G Motor Graders. Add the following effective product identification numbers: 120G (4HD1064) and 140G (5MD695) Motor Graders.

--------------- END SUPPLEMENT ---------------

Description of Change: New circle drive gerotor motor groups are available for use on the above motor graders. The new gerotor motor groups will provide higher torque to the circle drive during machine operation. Also, the design of the new gerotor motor groups will reduce the possibility of seal failures.

Adaptable As: The new 9T5976 Gerotor Motor Group is a direct replacement for the former 8J5407 Gerotor Motor Group on 120G, 130G, 140G, 12G and 14G Motor Graders. The new 9T5977 Gerotor Motor Group is a direct replacement for the former 4T8587 Gerotor Motor Group on 16G Motor Graders. The serviceable components of the new 9T5976 and 9T5977 Gerotor Motor Groups are shown in the illustration and identified in Charts A and B.


Location of components in 9T5976 and 9T5977 Gerotor Motor Groups.

Caterpillar Information System:

1988/12/19 Cold Weather Readiness Checks {1456,1250}
1988/12/19 New Material Used For Rotating Seal Rings In Some Power Shift Transmissions, Steering Clutches And Torque Converters {3101,3150,4100}
1988/12/12 Oil Cooler Bypass Elbow Changed To Prevent Bypass Valve Seizure{1314,1318}
1988/12/12 New Alternator Drive Pulley Has Hardened Wear Sleeve; New Seal Used On Pulley{1425,1357}
1988/12/12 Maintenance Procedure Extends Service Life Of Exhaust Manifold Studs{1050}
1988/12/12 New Mounting Bolts Used In Aftercooler Housings{1063,1058}
1988/12/12 New Solenoid Valve For Rotor Lift System{8245}
1988/12/12 New Switch For Back-Up Alarm{7406}
1988/12/12 Parts Needed If Air Compressor Tubes Replaced{4257,1803}
1988/12/12 New Operator Monitor Group Used{7490}
1988/12/12 Revised Instructions For Installation of New Maintenance Free Batteries{1401,1400}
1988/12/05 Operation Of Feeder Sensor Control{8216}
1988/12/19 New Brake Disc Assemblies, Axle Lubricant Reduce Brake Chatter {3278,4255}
1988/12/19 Stronger Spacers Can Be Used On Stabilizer Street Pads {6505}
1988/12/19 New Latch Used For Engine Side Doors {7263}
1988/12/19 New Axle Differential Group Used {3258}
1988/12/19 New Detent Group Available For Hoist Control Valve {5051}
1988/12/19 New Camshafts Used; Camshaft Installation Kits Available {1209,1210}
1988/12/19 Check Assembled Dimension For Rack Lever Travel If Governor Housing Assembly Is Replaced {1264}
1988/12/19 New Piston Body Assemblies Used {1214}
1988/12/19 Do Not Use Heli-Coils® To Repair Rocker Arm Assemblies On 5.4" Bore Engines {1123}
1988/12/19 Operation Of Differential Lock {3264}
1988/12/19 Twelve Bolts Used In Drum Support Bearing Retainer {8227}
1988/12/26 New Muffler And Pipe Used; Low Idle Increased {1061,1062,1264}
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