1977/01/31 Caterpillar

New Remote Control Switch Assembly For Electric Hydraulic Pumps{0621,0623}

Usage:

The 2P5550, 3S6224 (115V); 2P5500 and 8S8033 (230V) Electric Hydraulic Pumps are equipped with a new remote control switch assembly. The 5P7278 Remote Control Switch Assembly is an ON-OFF switch that has more resistance to wear and damage than the former switch assemblies. The switch controls are inside a rubber control handle, which is not easily damaged and is sealed to prevent water damage. The switch has a cord length of approximately 6 ft (1.9 m), which is necessary to keep servicemen a safe distance away from the high pressure applications the pumps are used in.

5P7278 Remote Control Switch Assembly for electric hydraulic pumps.

The 5P7278 Remote Control Switch Assembly will be standard equipment on all new electric hydraulic pumps, and is the service replacement for the former switch assemblies which are canceled. Use the chart that follows to order the correct replacement parts:

Caterpillar Information System:

1977/01/31 Improved Crankshaft Main Bearing With Higher Strength Aluminum Alloy{1203}

1977/01/31 New Disconnect Switch Assembly Has Better Resistance To Corrosion{1411}

1977/01/24 Lightening Holes Not Drilled In Some Crankshafts{1202}

1977/01/24 New Cylinder Liners{1216}

1977/01/24 Coupling With A Slip Fit Now Used At Turbocharger Exhaust Outlet Instead Of Coupling With Piston Rings{1061}

1977/01/24 Same Valve Camshaft Assembly Used On Direct Injection Engines Now Used On Engines That Have Precombustion Chambers{1210}

1977/01/24 Adapter For Disassembly And Assembly Of Turbocharger Cartridge{0620,1053}

1977/01/24 Exhaust Valve Guides With A Counterbore Are Now Available{1104}

1977/01/24 Exhaust Manifold Coupling With A Slip Fit Now Used Instead Of A Coupling With Piston Rings{1061}

1977/01/24 Drain All Coolant From Engines Before Shipment For Remanufacturing{0355,1350}

1977/01/17 New Water Temperature Regulator Has A Closer Fit At The Valve Seat To Keep Leakage At A Minimum{1355}

1977/01/17 New Flywheel Assemblies Are Available For Use With Spicer Transmissions{1156}

1977/01/31 Transportation Notice Plate Is No Longer Needed For Pressurized Nitrogen Cylinders{7557}

1977/01/31 Low Emission Truck Engines With Exhaust Gas Recirculation (EGR) Systems{1050}

1977/02/14 Correct Use Of Plugs In Drain Holes Of Hydraulic Pumps That Have Two Seals On The Shaft-Use A Plug In Drain Hole Except With Water Glycol Systems{5055,5073}

1977/02/14 New 5P7307 Engine Turning Tool Group Fits All Engines{0611}

1977/02/14 Test Used Fuel Nozzles Before You Install New Nozzles; Tips On Test Procedures{1254,0651,0336}

1977/02/14 Diesel Fuel Recommendation Expanded{1280}

1977/02/28 Modification To Holder To Machine Counterbore On Cylinder Block{0664,1201}

1977/02/28 Hardened Washers Now Used Between The Bolt Heads And The Engine Front Support To Keep These Bolts Tight{1153}

1977/02/28 Clip Now Used To Hold Coolant Line For The Turbocharger{1052,1380}

1977/02/28 Lock Now Available For Connecting Rod Bolt Used In TU-FL0501 Air Compressor{1065}

1977/02/28 Improved Exhaust Valve Now Available{1105}

1977/02/28 Changes To Retainer Nut Torque And Assembly Procedures For Turbocharger Compressor Wheels{0374,1052}