Komatsu PC20R-8 Shop Manual page 13

STANDARD TIGHTENING TORQUE
2. TIGHTENING TORQUE FOR NUTS OF FLARED
Use these torques for nut part of flared.
Thread diameter Width across flats
of nut part
(mm)
1/2" - 20
9/16" - 18
3/4" - 16
7/8" - 14
1 "
1. / - 12
16
5 "
1. / - 12
16
5 "
1. / - 12
8
22
33
The recommended coating materials prescribed in Komatsu Utility Shop Manuals are listed below:
Nomenclature
Adhesives
Gasket sealant
Grease
(Lithium grease)
Vaseline
PC20R-8 PC27R-8
of nut part
(mm)
17
17
22
27
32
38
50
27
41
COATING MATERIALS
Code
Loctite 222 Used for low resistance locking of screws, check nuts and adjustment nuts.
To prevent the loosening of bolts, nuts and plugs and the leakage of oil. Used for
Loctite 242 medium resistance locking of screws and nuts of every type, and for locking keys
and bearings.
Loctite 262
Used for high resistant of threaded parts that can be removed with normal tools.
Used for high resistant locking and for sealing threaded parts, bolts and stud
Loctite 270
bolts.
Loctite 542
Used for sealing the union threads for hydraulic tubes.
Used for sealing rather exact plane surfaces when the option of possible future
Loctite 573
dismantling is required.
Used for high resistant locking of mechanical components that can be removed
Loctite 601
only after heating
Used to lock cylindrical couplings and for the permanent locking of threaded parts,
Loctite 675
and also to lock shafts to bearings, gears, pulleys, pins, bushings, etc.
Used by itself on mounting surface on the final drive and transmission cases.
Loctite 510
(Clearance between flange surfaces within 0.2 mm).
Used by itself on mounting flat surface
Loctite 518
(Clearance between surfaces within 0.5 mm)
Applied to bearings, sliding parts and oil seals for lubrication, rust prevention and
ASL800050
facilitation of assembling work.
±
Used for protecting battery electrode terminals from corrosion.
TIGHTENING TORQUE
kgm
2.6w0.5
4w0.5
6.7w2
8w2
9.7w3
17w3
20w5
8w2
20w5
Applications
Nm
25.5w4.9
39.2w4.9
65.7w19.6
78.5w19.6
95.15w29.4
166.7w29.4
196.2w49
78.5w19.6
196.2w49
00-9