1988/09/12 Caterpillar

Use Thread Lock On Suspension Cylinder Pistons{7201,7213,7200}

Usage:

D25C, D30C, D35C, D250B, D300B, D350C, D400 Trucks

SUPPLEMENT: 10/17/88

SERVICE MAGAZINES; SEPTEMBER 12, 1988; PAGE 2; "Use Thread Lock On Suspension Cylinder Pistons" on D25C, D30C, D35C, D250B, D300B, D350C, D400 Trucks. Some of the torque conversions listed in the chart are incorrect. The torques given in N·m are correct. The correct conversions are: 410 N·m (300 lb ft), 800 N·m (590 lb ft), and 600 N·m (440 lb ft).

--------------- END SUPPLEMENT ---------------

Thread lock is now used during the assembly of the piston to the cylinder rod on certain suspension cylinders used on the above articulated dump trucks. When these suspension cylinders are overhauled or repaired, 9S3263 Thread Lock should be applied to the first two threads on the cylinder rod before installing the piston. Be sure the threads in the piston and on the cylinder rod are clean and free of foreign material before the thread lock is applied. The chart lists the models and suspension cylinder part numbers that require the thread lock. The tightening torque for the pistons is also listed.

Caterpillar Information System:

1988/09/12 New Retainer Ring Used To Keep Spherical Bearing In Hydraulic Cylinders{7562,7553}

1988/09/12 New Low Temperature Ring Seals Available For Parts Service Of Front And Rear Suspension Groups{7201,7213}

1988/09/05 Use Either 7C0192 Or 9X0532 Gauge For Service Replacement Of Engine Oil Pressure Gauge{7455}

1988/09/05 Electric Pump Now Used In Drum Water Spray System{8209}

1988/09/05 Trailer Axle Clearance{7050,3260}

1988/09/05 Drain Holes Added To Rear Frame To Prevent Freeze Damage{7050}

1988/09/05 New Thrust Washer Used In Six Wheel Drive Transfer Gearbox{3250}

1988/09/05 New Stabilizer Valve Group Has New Lock Valve{6505}

1988/09/05 Aerosol Dry Film Lubricant Available for Extension Sticks{0645,6502}

1988/09/05 Lists Of Duo-Cone Seals And Oil Recommendations{3258,4050,4208}

1988/09/05 Pressure Taps Added To Hoist Oil Lines Group{5083,5057}

1988/09/05 New Oil Level Gauge Used{1326}

1988/09/12 New Torque Converter Mounted Retarder (TCMR) Control Arrangement Changes Operation Of Retarder Indicator{3121,3120}

1988/09/12 Be Sure Drive Line Parking Brake Is Correctly Adjusted{3275}

1988/09/12 Resilient Rear Mounts Used For Hydraulic Tank{5056}

1988/09/12 Radiator Overflow Hose Rerouted To Rear Of Radiator{1353,1380}

1988/09/12 Usage Of Electronic Transmission Controls{3168}

1988/09/12 Procedure To Adjust Rotor Drive Clutch{3059}

1988/09/19 New Pitch Control Link Group Used In 3W5091 Three-Point Hitch Group{7120}

1988/09/19 Purpose Of Governor Decelerator Linkage And Its Adjustment{1265,1269,1276}

1988/09/19 Use Only 2U3371 Bulk Tubing When Replacing Brake Lines{4257,7554}

1988/09/19 New Springs Used In Upper Frame Assembly Of Driver Seat Group{7321,7324}

1988/09/19 New Heat Sinks Have Solid Diode Wires{4472}

1988/09/19 New Service Tools Available{0600}