CONNECTION GP-ELECTRICAL 3966851 - Caterpillar

Do not let the retaining compound get into the compressor wheel bore or on the shaft, because it can make removal of the compressor wheel difficult during future turbo-charger disassembly.
C. Put a small amount of lubricant, such as Lubriplate, on the nut seat area on the compressor. Do not put lubricant on the threads.D. Tighten the compressor wheel retainer nut to: 3LM, 3LK ... 20 2 N m (165 15 lb. in.)E ... 30 3 N m (264 24 lb. in.)
Do not bend or add stress to the shaft when nut is tightened.
(AiResearch Only)
Test For Type Of Impeller Installation
1. Install the proper thrust collar and seal carrier spacer on the shaft-wheel assembly to be used.2. Install impeller on shaft by hand.3. Measure the distance between impeller and seal carrier at the point where impeller no longer moves freely on shaft.4. If the distance is: (a) more than .31 in. (7.9 mm), use heat for installation. *(b) .31 in. (7.9 mm) or less, use room temperature installation. **