1984/01/16 Caterpillar


New Cover And Lever Will Prevent Overtravel Of Valve Spool {3313}

Usage:


All 7200 Series Marine Transmissions

Reference: Service Magazine, August 8, 1983, Page 2, "Failure Of Ballstud In Control Valve Can Cause Problem With Control Of Vessel."

Description of Change: A new cover and lever are now used in the control valve group on the above marine transmissions. The new cover and lever will prevent overtravel (too much travel) of the spool in the valve group. As a result, there will be a decrease in the amount of stress put on the ballstud.

Formerly, the cover and lever did not limit the travel of the spool. If an actuator cylinder was not installed correctly by the ship builder, the valve spool could be moved too far. The result was high stress on the ballstud.

Adaptable As: The new 6T6546 Cover and 6T6545 Lever are direct replacements for the former 5L7364 Cover and 5L7365 Lever. The former 5L7364 Cover is canceled.

NOTE: Any time the control valve or actuator cylinder is moved or worked on, the movement of the valve spool, ballstud and linkage must be checked. The valve spool must not bottom out before the lever contacts the "stop dowel" in either ahead or astern position.


Location of 6T6546 Cover and 6T6545 Lever.

Caterpillar Information System:

1984/01/09 Drive Block Retainer Plates Are No Longer Used{3305}
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}
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}
1984/02/06 New Cylinder Head Assembly Made With A Different Material {1101}
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