DISC 1221880 - Caterpillar

Twin Disc IBF214, IBF314, IBF318, IBF321 Clutches On 3400 Family Of EnginesSUPPLEMENT: 03/11/91Service Magazine; August 8, 1988; Page 20; "New Recommendations For Bearing Lubrication And Adjustment," on Twin Disc IBF214, IBF314, IBF318, IBF321 Clutches On 3400 Family Of Engines.Disregard the information about Twin Disc IBF318 Clutches in this article. The most current information about the clutch is in the article titled "New Recommendations For Lubrication, Maintenance, And Adjustment" in this issue.--------------- END SUPPLEMENT ---------------The type of lubricant, the interval, and bearing adjustment have been changed on the above Twin Disc Clutches used on the 3400 Family Of Engines. The new lubricant and adjustment recommendations apply to all earlier clutches of these four models. See following topics.
... The type of lubricant for the rear bearing and throwout bearing has been changed from NGLI No. 2 lithium base grease to the 2S3230 Lubricant, a high temperature bearing grease. Only one shot of grease (one stroke on the handle) is to be applied every 10 hours. The use of less grease causes less heat to be generated, which in some applications can cause the former grease to melt and result in a bearing failure from lack of lubricant. Also, the 2S3230 Lubricant has a higher melting temperature than the former lubricant. The new lubrication plate shown in Illustration 1 is installed on the clutch housing.
This article contains an important lubricant recommendation when the bearings are removed and installed.
Illustration 1. The new 9Y4298 Instruction Plate shows the new day-to-day recommendation.... For the IBF214 and IBF314 Clutches, the bearing housing cavity is packed with about 2 3/4 cartridges of grease before installation of the bearings. For the IFB318 and IFB321 Clutches, no grease is installed in the bearing cavity because it is a smaller cavity.
... The bearing adjustments have been changed to give the correct rear bearing end clearances.
IBF214, IBF314 Clutches - New Bearing Adjustments And New Initial Lubricant Recommendation
On IBF214 and IBF314 Clutches, the bearing end clearance is controlled by shims under the bearing retainer plate which is fastened with bolts. See Illustration 2.
Illustration 2. Shims used in IBF214 and IBF314 Clutches for adjusting bearing clearance.1. Disassemble the clutch, wash the lubricated parts in solvent, and put engine oil on them.2. Assemble the shaft, bearings, retainer plate, and main housing. Use no shims at this time.3. Support the assembly on the bearing carrier with the shaft vertical and the output end of the shaft down.4. Tighten the bolts on the retainer plate evenly, while rotating the shaft with a torque wrench until 7 N m (60 lb in) of torque is required to turn the shaft. This is rolling torque, and with this torque the bearing clearance is ZERO.
It is very important that the shaft be turned and the torque read as the bolts are tightened. The torque should be constant with no hard-to-turn spots. This could be caused by foreign material in the bearings, or interference between the shaft and the labyrinth seals.
5. Measure the average shim gap and record this