Use Correct Specifications To Check Piston Ring Gaps{1215}
Usage:
D343, D346, D348, And D349 Engines
- SUPPLEMENT: 06/22/81
SERVICE MAGAZINE, MAY 25, 1981, PAGE 2. In the article "Use Correct Specifications To Check Piston Ring Gaps," the chart has an error. The chart which follows has the correct ring gap specifications.
--------------- END SUPPLEMENT ---------------
Be sure to use correct specifications to check the ring gap in the above engines. The ring gaps must be checked while inside a new liner with a bore of 5.400". Correct ring gap specifications are given for both rectangular ring and Keystone piston ring designs in the chart which follows.
The ring gap will increase 0.08 mm (.003") for each 0.03 mm (.001") increase in the bore size.
Caterpillar Information System:
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}
1981/05/11 Caterpillar Cooling System Conditioner (Liquid Or Spin On Elements) Can Be Used In Ford Truck Installations{1350}
1981/05/11 Use 6V4069 Body Group To Remove Tapered Drive Sleeve{0611}
1981/05/04 Use 6V4057 Grease Gun Adapter In Difficult Access Areas{0671}
1981/05/04 Crankshaft Failures; New Thrust Plate{1203,1202,1230}
1981/05/25 Washer Added Between Bolt And Thrust Plate For Oil Pump Idler Gear{1206}
1981/05/25 New Cover Assembly And Gasket Used In Oil Pump Group{7418}
1981/05/25 Air System Leakage Can Cause Problems With Engine Governor Stability At Low Idle RPM{1264,1803}
1981/06/01 Locks No Longer Used On Flywheel Bolts; New Torque Specifications For Flywheel Bolts{1156}
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}