1984/01/09 Caterpillar

Drive Block Retainer Plates Are No Longer Used{3305}

Usage:

7231, 7241, 7251, 7261 Marine Transmissions

Description of Change: Washers are now used in place of retainers and locks in the marine transmission mounting groups. The washers are used to make sure the bolts are not too long when the former parts are removed.

The former retainer plates were designed to hold the rubber drive blocks in place if they broke. Reports show that breakage of the drive blocks is not currently a problem. Also, on the 7231 and 7241 Marine Transmissions the ends are not supported. These ends can break off and cause vibration and transmission damage. On some transmissions locks were used with the bolts that hold the retainers in place. These locks are also no longer used.

Adaptable To: The new washers are direct replacements for the former parts as shown in the chart.

Caterpillar Information System:

1984/01/09 Parts Service Information For Pistons{1214,1225}

1984/01/09 High Levels Of Soot In The Oil; Make Sure Air Fuel Ratio Control Operates Correctly{1278}

1984/01/09 Usage Of Pistons With Rectangular Rings{1214,1215}

1984/01/09 Stronger Water Cooled Exhaust Manifold Used{1059}

1984/01/09 Water Pump Housing Is Now Available For Parts Service{1373}

1984/01/09 Reference Chart For Usage Of New Electronic Components{7400,0374}

1983/12/19 FT1808 Cable Permits Easier Use Of 6V2100 Multitach To Check Engine Or Alternator RPM{0651}

1983/12/19 New Monitor Groups Will Keep Water Out Of EMS Panel{7490}

1983/12/19 Replacement Valve Guides Can Be Used To Recondition Cylinder Heads{1104}

1983/12/19 Smaller Dowel, Stronger Cover Used On Oil Pump Drive Shaft{3310}

1983/12/12 Modification Of Control Panel Gives Different Power Source For Overcrank Timer To Prevent Starter Motor Failures{7450}

1983/12/12 Cooling System Conditioner Helps Prevent Cavitation Damage{1350}

1984/01/16 New Cover And Lever Will Prevent Overtravel Of Valve Spool {3313}

1984/01/23 New Plastic Impeller Will Help Improve Service Life Of Water Pump Seal{1361}

1984/01/23 Housing Assembly Now Has Sleeve To Prevent Housing Damage{3306}

1984/01/23 Remanufactured Connecting Rod Assemblies{1218}

1984/01/23 New Overhaul Kit For Sea Water Pump Has Improved Impeller{1364}

1984/01/30 New Water Temperature Regulator Helps Prevent Engine Overcooling{1355}

1984/01/30 Correct Wiring And Fuse Must Be Used For Correct Operation Of Shut-Off Solenoid Group{1259}

1984/01/30 3406B Engines Available{1000}

1984/01/30 Modification May Be Necessary To 6V4902 Hose Press Tool{0623,0624,0665}

1984/01/30 Larger Capacity Oil Pan Permits Longer Oil Change Interval{1302,1307}

1984/02/06 New Service Tools Available {0600}

1984/02/06 Correct Oil Pressure Setting For Marine Transmissions {3353,3354}