Locks No Longer Used On Flywheel Bolts; New Torque Specifications For Flywheel Bolts{1156}
Usage:
D353 Industrial And Marine Engines
The 1M6806 Locks are no longer used on flywheel bolts in the D353 Industrial and Marine Engines. With these locks, it was possible for the original bolt torque value to decrease, and permit loose bolts.
The flywheel bolts are now installed without the locks and are tightened to a torque of 377 ± 25 N·m (280 ± 20 lb ft). When service work is done on a flywheel, remove the locks and tighten the bolts to the new torque.
Caterpillar Information System:
1981/05/25 Air System Leakage Can Cause Problems With Engine Governor Stability At Low Idle RPM{1264,1803}
1981/05/25 New Cover Assembly And Gasket Used In Oil Pump Group{7418}
1981/05/25 Washer Added Between Bolt And Thrust Plate For Oil Pump Idler Gear{1206}
1981/05/25 Use Correct Specifications To Check Piston Ring Gaps{1215}
1981/05/25 Instruction Cards For "Go-No Go" Gauges Now Available{0653}
1981/05/18 New Mounting Group For Overspeed Switch{7410}
1981/05/18 Replacement Bushings For Delco-Remy Electric Starting Motors Must Be Machined For Correct Clearances{1453,1454,1465}
1981/05/18 Change Made To Power Take-Off Adapter Housing{3055}
1981/05/18 Remove Direct Injection Fuel Nozzles With 6V4061 And 6V4054 Nozzle Pullers{0621}
1981/05/18 Safety: Battery Vent Caps{1401}
1981/05/11 Installation Of Rear Bearing Oil Seals In 3N6542, 3N8617, And 3N8618 Rear Power Takeoff Clutch Groups{3055}
1981/05/11 Remove And Install Cam Bearings With 6V4077 Cam Bearing Tool Group{0621,0622}
1981/06/01 Correct Use Of Keystone Ring Groove Gauges{1214,1215,1312,0653}
1981/06/01 New Seals And Clutch Discs Used{3300,3302}
1981/06/01 Some Single Part Numbers Have Two Half Bearings{7551}
1981/06/01 New Service Meter Used In Mechanical Shutoff Group{7478}
1981/06/01 Hardened Nuts And Higher Torque Now Used In Ahead And Astern Clutch Groups{3302}
1981/06/08 Inspect Piston Skirts During Engine Overhaul Procedures{1214,1213}
1981/06/08 Troubleshooting Water In Shut-Off Solenoid Housing{1259}
1981/06/08 Remanufactured Clutch Plates Available For Power Shift Transmissions{3155,0375}
1981/06/15 Procedure To Stop Lubricant Leakage From Flexible Couplings{3252}
1981/06/15 Plastic Cases Now Available For Electronic Testing And Diagnostic Equipment{0630,0650}
1981/06/22 6V3145 Leveler Now Available{0644}
1981/06/22 Cylinder Liners Can Now Be Reconditioned Automatically{0664,0674,1216}