New Camshaft Has Improved Profile (Shape) Of Exhaust Cam To Extend Service Life{1210}
Usage:
D353 Engines;
G353 Natural Gas Engines;
D9, DD9, SxS D9 Tractors;
594 Pipelayers
Description of Change: A new camshaft is used in the D353 Engines. The new camshaft has a different profile (shape) of the exhaust cam, which lowers the contact stress on the cam. This will lower the rate of wear and extend the service life of the camshaft. The change in design has no effect on engine performance.
Adaptable As: The new 1N4085 Camshaft Assembly is a direct replacement for the former 4H9983 Camshaft Assembly. The new camshaft is in effect on engines with Serial Numbers 46B8911 including 46B8909, 47B4943, and 97U13768.
Caterpillar Information System:
1981/02/02 Elbow With Orifice Now Used In Regulator And Housing Groups For Cooling Systems{1355,1361}
1981/02/02 Aluminum Identification Plate No Longer Used On Torque Converters; Identification Numbers Put Directly On Converter Housing{3101}
1981/02/02 Corrected "5.4" 60°V Main Bearing Selection Guide" Is Now Available{0374,1203,1202}
1981/02/02 New, One-Piece Valve Lifter Used{1209}
1981/02/02 New Exhaust Manifold Has Slip-Joint Connections{1059,1061}
1981/02/02 Changes Made To Exhaust Manifold Group And Cylinder Head Group{1059,1101}
1981/02/02 6V3129 Nozzle Puller Group And FT1533 Nozzle Assembly Adapter Can Be Used To Remove Fuel Nozzles{0621,1254}
1981/01/26 Use 2P2333 Manifold Sealer On Exhaust Manifold Slip Joints (Junction) During Assembly{1059}
1981/01/26 Use Scheduled Oil Sampling To Find Change Intervals For Hydraulic Oil{5068}
1981/01/26 Washers Added To Prevent Broken Bolts In Stabilizer Rod Joints (Connections) On Rear Axle Housing{3260,3268}
1981/01/26 6V3150 Engine Pressure Group And 6V3121 Multitach Group Are Available For Testing Engines{0650,1000}
1981/01/26 Improved Tach Drive Adapter Has Step In Shaft To Keep Coupling Engaged{0651,0653}
1981/02/09 Slip Clutches Now Available On Circle Drive Group{5058,5237,5207,6154}
1981/02/16 New Publication: Engine Bearings And Crankshafts{0374}
1981/02/16 Different O-Ring Seal Now Used On The Oil Pump Suction Tube{1307,1304}
1981/02/23 Conversion Of Earlier Machines To Use Water-Cooled Aftercoolers{1063}
1981/02/23 Later Pistons Have A Smaller Number Of Drain Holes In Oil Ring Groove{1214,1213}
1981/02/23 Two New Oil Filter Assemblies Available; Always Use Correct Oil Filter And Follow Caterpillar Change Intervals{1318}
1981/02/23 New Sequence And Pressure Control Valve Has Reducing Valve With Modulation{3167,1359}
1981/02/23 Increased Force Used For Installation Of Steering Clutch Flange On Final Drive Input Pinion To Prevent Oil Leakage{4057,4091,4052}
1981/02/23 6V4163 Bit And 6V4164 Driver Now Available For Removal Of Bolts For Flyweight Carrier{0612,1264}
1981/02/23 New Planetary Carrier, Which Uses Four Planet Gears For Better Load Distribution, Is Available For Parts Service{4092}
1981/02/23 New Sealant Used In Place Of Gasket For Hydraulic Tank Flange{5056,7555}
1981/02/23 Changes Made To Power Cord Plugs On 5P6532 And 5P6533 Reader Projectors{0160}