1990/11/01 Caterpillar


New Relay Added in the 7C9063 and 7C9064 Instrument Panel Groups For Use With New Digital Pyrometers; Special Instruction SEHS9020 Available

Usage:


3606 (8RB),
3608 (6MC),
3612 (9RC),
3616 (1PD) Engines

A new relay has been added to the 7C9064 Inline Diesel and the 7C9063 Vee Diesel Instrument Panel Groups. The relay addition is effective with 8RB359, 6MC290, 9RC66, 1PD38. This relay and associated parts are adaptable to existing instrument panels.

This relay will provide the necessary isolation between the annuciator and either the 9Y1784 or 7E0870 Digital Pyrometers.

To connect the pyrometer to the annuciator panel use the 9Y2921 Relay to isolate the pyrometer switch contacts from the annuciator panel. The wiring instructions and diagram are included in Special Instruction SEHS9020, "Service Replacement Of 7C8980 Pyrometer With 9Y1784 Or 7E0870 Digital Pyrometer."

Parts needed for 7C9064 Instrument Panel Group

Parts needed for 7C9063 Instrument Panel Group

Caterpillar Information System:

1990/11/01 Additional Serviceable Components in Electric Starter Group
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1990/11/01 New Turbocharger Gas Inlet Housings Used
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1990/11/01 New Cylinder Head Gasket And Higher Cylinder Head Bolt Torque
1990/11/01 Improved 7W7730 Cylinder Head Gasket Provides Better Sealing Capability
1990/11/01 New Crankshaft Seal Groups Used
1990/11/01 Setscrew And Nut Available For Fuel Setting And Injector Synchronization
1990/11/01 New Stronger Exhaust Valve Push Rod Used In Valve Mechanism Groups
1990/11/01 New Exhaust Manifold Gasket And Locks Used In Exhaust Manifold Groups
1990/11/01 Modification Of 1U7791 Valve Seat Driver
1990/11/01 Governor Control Motor Polarity May Require A Change
1990/11/01 Planetary Housing Requires Two Ball Plugs
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1990/11/01 New 4C6715 Silicone Compound Available For Components Where Centrifugal Force Is Present
1990/11/01 Obsolete Capacitor In VR1 Voltage Regulators
1990/11/01 New Caterpillar Battery Warranty Statement, SELF5124
1990/12/01 Use Only Stainless Steel Cylinder Liner Shims To Salvage Damaged 4.75" Bore Cylinder Blocks
1990/12/01 Remanufactured Camshafts And Cam Kits Available For Parts Service
1990/12/01 New Rear Power Takeoff Clutch Plates Do Not Contain Asbestos
1990/12/01 New Bronze Thrust Plate Used On Center Main Bearing Of Crankshaft Groups
1990/12/01 Service Tips For Piston Cooling Jets (Tubes)
1990/12/01 Correct Handling And Replacement of 3T6962 Pressure Switch Assembly
1990/12/01 New Expansion Tank Used
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