AIR CLEANER GP 4N7914 - Caterpillar

Illustration 41 g03354896
Inner star flange (C) The wear value to the groove flanks
Measure the wear value (C) on the groove flanks. Refer to Table 2 for the correct dimension.
Table 2
Maximum Dimension (C)    
1 mm (0.039 inch)    If damage or wear is identified but not described above, contact customer service or a customer service location to discuss the issue in more detail.
Illustration 42 g03422709
(D) Radial bearing clearance (3) Inner star flange (14) Outer coupling flange (32) Bearing in the outer coupling flange
Illustration 43 g03422728
(D) Radial bearing clearance (9) Centering ring (27) End Cover (33) Bearing in the centering ring
Illustration 44 g03424946
(E) Axial bearing clearance (2) Flexible coupling gp (3) Inner star flange
Measure radial bearing clearance (D) and axial bearing clearance (E). Refer to Table 3 for the correct bearing clearance.Note: Axial bearing clearance (E) is the total back and forth movement of inner star flange (3).
Table 3
Bearing Condition     Radial Bearing Diameter Clearance     Axial Bearing Total Clearance    
New    
0.11 mm (0.004 inch) to
0.27 mm (0.011 inch)    
0.3 mm (0.012 inch) to
0.4 mm (0.016 inch)    
Used     Max.
0.54 mm (0.021 inch)     Max.
0.8 mm (0.032 inch)    Troubleshooting
Mechanical damage to the coupling can be caused by the following:
Impact from heavy objects like tools and so on
Overload of the coupling
Other unknown sourcesDue to the smaller wall thickness and the higher stress level compared to the conical shaft region, damages on the membrane are more critical for the structural integrity of the coupling than damages on the conical shaft.
Table 4
Inspected Condition    Corrective Measure    
O-rings sweat during operation.
Oil traces are present radially on the flange and side plate.
No drips are formed.     No effect on the function of the coupling.
No repair required.    
O-rings leaking.
Drips are formed.     Remove and dismantle coupling.
Replace O-rings.
Check lead-in grooves and replace worn parts, if applicable.    
Traces of oil in a radial position on the flange or side plate.
Main bolts (4) leaking.     Loosen leaking main bolts, reseal the bolts and tighten.    
Traces of oil in a radial position on the side plate.
Bolts (if venting screw present) leaking.     Loosen leaking bolts.
Reseal the bolts and tighten.    
Wear at the middle blades greater than the permissible wear dimension (A).     Replace the spring pack assembly (18) (by customer service or a customer service location.)    
Wear or deformation of the bronze shims (31) in the case of multiple blades.     No influence on the function of the coupling.
First exchanged when the spring packs (18) were completely replaced.    
Wear at the groove flanks greater than the permissible wear dimension (C).     Replace inner star flange (3) or rework groove flank.
Clarify with customer service or a customer service location.    
Signs of wear on the outer diameter of inner star flange (3) in the area of intermediate pieces (29), outer coupling flange (15), or flywheel (1).     Check alignment of shaft and correct. Replace damaged parts, if necessary. (Clarify with customer service or a customer service location.)    
Bearing play