1997/10/27 Caterpillar


All "H" Series Motor Graders (Except 24H) Are Now Equipped With 2 Cylinder Air Compressors{1803}

Usage:


12H (4XM, 5ZM, 8MN, 2WR, 2GS),
14H (7WJ),
16H (6ZJ),
120H (4MK, 5FM, 6TM, 2AN, 9YR),
135H (3YK, 7MM, 8WN),
140H (2ZK, 5HM, 8JM, 9TN, 9ZN, 3AS),
143H (1AL),
160H (9EJ, 2FM, 3GM, 9JM, 2HS),
163H (5AK) Motor Graders

Description of Change: All "H" Series Motor Graders (except 24H) are now equipped with 2 cylinder air compressors.

NOTE: The 14H and 16H Motor Graders have been equipped with 2 cylinder air compressors since first production.

Formerly, all of these motor graders (except those noted) were equipped with air compressor groups that included a single cylinder air compressor. The new air compressor groups required the use of new compressor air line groups. The new air compressor groups will provide an increased reserve for the air systems on these machines.

Adaptable To: Chart A identifies the new air compressor groups and air compressor lines groups and effectivity on these motor graders. When use together, the new air compressor groups and air compressor lines groups identified in Chart A are adaptable to all earlier "G" and "H" Series Motor Graders.


Illustration 1.
Serviceable components of the 110-5765 Air Compressor Group.


Illustration 2.
Serviceable components of the 135-5094 Air Compressor Lines Group.


Illustration 3.
Serviceable components of the 145-4539 Air Compressor Group.


Illustration 4.
Serviceable components of the 145-3993 Air Compressor Lines Group.

Caterpillar Information System:

1997/10/27 Stronger Sun Visor Guides Available {7300,7340}
1997/10/27 Improved Steering Column Boot Resists Cracking{4338,7300}
1997/10/20 Service Interval Change For Extended Life Coolant Extender And Extended Life Coolant{1395,7543,7545}
1997/10/20 Improved Sealing On Caterpillar Monitoring System And VIMS Modules Provides Resistance To Lens Fogging{7490,7601}
1997/10/20 Service Repair Procedure For Engine Cowls{7263,7251}
1997/10/20 Correct Retaining Ring Specified For Shaft Seal In Piston Motor Group For Fan Drive{5058}
1997/10/20 New Off-Highway Truck Electronic Control Group (EPTC II) Used{7601,7490,7463}
1997/10/20 New Hose Assembly In Oil Cooler Lines Group Prevents Rubbing{1365,4268,7554}
1997/10/20 New Body Assembly Used In Off-Highway Truck Air Cleaner Group To Improve Air Flow To Pre-Cleaners{1051,1055}
1997/10/20 Special Instruction, REHS0078, "Retrofit Procedure For Air Operated Exhaust Diverter" Is Available{0374,1061}
1997/10/20 New Hold Back Latch Available{7310}
1997/10/20 Improved Rust Protection On Cab Doors{7308}
1997/10/27 Reliability Of Transmission Fluid Level Reading Improved With Addition Of Baffle Plate{3081,3080}
1997/10/27 Improved Duo-Cone Seal Group Increases Service Life{4201,4050}
1997/10/27 New Custom Product Support Literature Is Available For 773D And 775D Trucks Equipped With Wiggins Service Center{0374}
1997/10/27 New Custom Product Support Literature Is Available For 777B Trucks Equipped With Air Quick Disconnect{0374}
1997/10/27 New Custom Product Support Literature Is Available For 776C Tractors And 777C Trucks Equipped With Fuel Tank Extension Group{0374}
1997/10/27 Changes Made To Water Lines Group In Order To Reduce Damage Caused By Vibration{1380}
1997/10/27 New Brake Valve Groups Have Breather Plug In Vent Port For Air Cylinder Group{4265}
1997/10/27 Updated VIMS Configurations Available For 793C Off-Highway Trucks{7601,7407,7417,7470,1924}
1997/10/27 Corrected Boom Chain Information For Operation And Maintenance Manual{6460,6404}
1997/10/27 New Vane Pump Group, Assures Clearance For Drive Gear, And Correct Alignment Of Vane Pump Group With Torque Converter Cover{5055}
1997/10/27 New Troubleshooting Guide Available{0374}
1997/10/27 Significant Improvement For Pump Impellers (Water Pumps){1364}
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