Komatsu 930E-2 Shop Manual page 361

8. Wipe the polished metal seal surfaces with clean
tri-chloroethane to remove any foreign material or
fingerprints. No foreign particles of any kind
should be on the seal ring faces. Something as
small as a paper towel raveling will hold the seal
faces apart and cause leakage.
9. Apply a thin film of clean oil on the seal faces. Use
a lint-free applicator or a clean finger to distribute
the oil evenly. Make sure no oil comes in contact
with the rubber toric rings or their mating surfaces.
Before assembling both seals & housing together
– WAIT – at least two minutes. Let all tri-chlo-
roethane evaporate. (Some may still be trapped
between toric and housing ramp.)
J05018 03/01
10. Be certain both housings are in correct alignment
and are square and concentric. Move the parts
slowly and carefully toward each other.
NOTE: Do not slam, bump or drop seals together. High
impact can damage the seal face and cause leakage.
Disc Brake Assembly
Make certain
seals are square
and concentric
J5-13