Komatsu 140-3 Series Shop Manual page 325

DISASSEMBLY AND ASSEMBLY
2) Apply silicon gasket sealant LG-6 to the
parts of the cylinder block and cylinder liner
which will fit to the counterboared part.
• Wipe off dirt and oil with cloth from the
contact faces of the counterboared part
of the cylinder block and liner flange.
• Apply LG-6 in line 2 - 3 mm in diameter.
• Lap the ending point of LG-6 over the
starting point by 6 ± 6 mm.
If the applied gasket sealant is left for a
long time, its surface becomes hard. Ac-
cordingly, install the cylinder block to the
cylinder head in 50 minutes.
3) Apply rubber lubricant RF-1 to the liner O-
ring and cylinder block O-ring groove.
RF-1: DAIDO KAGAKU KOGYO CO., LTD.
If RF-1 is not available, apply clean engine
oil SAE No. 30 to the liner O-ring and clevis
seal.
140-3 SERIES
GENERAL ASSEMBLY OF ENGINE
Since the clevis seal and O-ring are swollen
and deteriorated by oil, do not leave them in
oil. Apply a small amount of oil to them thinly
with a brush just before fitting them.
4) After fitting the liner O-ring, check it for twist.
If it is twisted, correct it with a smooth rod
(about 10 mm in diameter).
5) When fitting the clevis seal, press it against
the seal groove all round so that it will not be
twisted.
Fit the clevis seal with the chamfered side
down.
13-23