Komatsu 140-3 Series Shop Manual page 350

DISASSEMBLY AND ASSEMBLY
Procedure for installing sleeved seal
Before installing the seal, make sure that the end
corners and lip sliding surfaces of the crankshaft
and housing are free from flaw, burr, fin, and rust.
When installing the seal, do not apply oil or
grease to the shaft, sleeve, and seal lip. Wipe off
the oil from the shaft.
Handle the seal and sleeve as an assembly and
never separate them from each other.
1) Set sleeve/seal (2) to tool N2.
2
Inside of sleeve:
13-48
Gasket sealant (LG-7)
GENERAL ASSEMBLY OF ENGINE
2) Bring the sleeve of the seal in contact with the
end of the crankshaft, then tighten the 3 bolts
evenly to press fit sleeve/seal (2) until the end of
tool N2 reaches the end of crankshaft (4).
First, tighten tool N2 until bolt N3 (45 mm)
stops, then tighten N4 (25 mm).
3) Remove tool N2 and install tool N1.
4) Tighten the 3 bolts evenly to press fit sleeve/seal
(2) until the end of tool N1 reaches the end of
crankshaft (4).
First, tighten too N1 until bolt N3 (45 mm)
stops, then tighten N4 (25 mm).
After press fitting the seal, remove the red
sealant layer from its periphery.
140-3 SERIES