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Problems, Causes and Actions

Problems, Causes and Actions

Below is a list of possible problems, the probable causes and actions/countermeasures.

  • B.1.1 Nicks on Bore Chamfer
  • B.1.2 Check for Looseness in Bore
  • B.2.1 Contaminants (Mud or Dust) Packed in Seal Area
  • B.2.2 Paint Spray on Seal Lip
  • B.2.3 Check for Seal Cocking
  • B.2.4 Check for Proper Insatallation and Orientation Relative to Assembly
  • B.2.5 Check for O.D. Leakage
  • B.2.6 Check for Case Deformation (dishing or damage)
  • B.3.1 Check Bolt Holes for Leakage
  • B.3.2 Check Gaskets for Leakage
  • B.3.3 Check for Axial Shaft End Play
  • B.3.4 Check for Excessive Shaft Runout
  • B.3.5 Check for Shaft to Bore Misalignment
  • B.3.6 Obtain Oil or Sealed Lubricant Sample
  • B.3.7 If a Wear Sleeve is Used, Check for Leakage Between Shaft and Sleeve
  • B.3.8 If Assembled Seal, Check for Leakage Between Clamped Elements
  • C.1.1 Measure Bore Diameter
  • C.1.2 Check Bore Chamfer
  • C.1.3 Inspect for Flaws or Voids in Housing
  • C.1.4 Check for Tool Withdrawal Marks on Bore
  • C.1.5 Check for Severe Scratches or Galling Marks on Bore
  • C.2.1.1 Lack of Wear
  • C.2.1.2 Excessive Wear
  • C.2.1.3 Eccentric Wear
  • C.2.1.4 Nicks, Scratches or Cuts at Lip Contact Area
  • C.2.1.5 Tears or Separations in Lip Area
  • C.2.1.6 Hardening or Cracking of Rubber
  • C.2.1.7 Measure I.D. and Radial Load
  • C.2.1.8 Coked Oil on Lip
  • C.2.1.9 Softening or Swelling
  • C.2.1.10 Inverted Lip Due to Poor Installation
  • C.2.2.1 Measure Seal Outer Diameter
  • C.2.2.2 Check for Severe Scratches on O.D.
  • C.2.2.3 Check for Peeled Rubber on O.D.
  • C.2.2.4 Check for Hardened Rubber on O.D. (Rubber O.D. Design)
  • C.2.2.5 Rubber O.D. Nonfills/Cuts
  • C.2.3.1 Missing Spring
  • C.2.3.2 Corroded Spring
  • C.2.3.3 Check for Correct Dimensions and Spring Load
  • C.2.3.4 Multiple Springs
  • C.2.3.5 Seperated Spring
  • C.3.1 Shaft Diameter
  • C.3.2 Shaft Surface Roughness (Primary Sealing Surface)
  • C.3.3 Shaft Corrosion
  • C.3.4 Lip Wear Band in Wrong Location on Shaft
  • C.3.5 Scratches or Nicks at Lip Contact Area on Shaft
  • C.3.6 Excessive Shaft Wear
  • C.3.7 Wide Shaft Wear Band Relative to Seal Wear Band
  • C.3.8 Shaft Discoloration or Coked Oil on Shaft
  • C.3.9 Machine Lead
  • C.3.10 Shaft Hardness
  • C.3.11 Shaft Chamfer Condition
  • C.3.12 Proper Shaft Material
  • C.3.13 Wear Sleeve Fit
  • C.4.1 Contaminants in Oil
  • C.4.2 Composition of Lubricant Compared to New

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