Komatsu F30791, Shop Manual

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STANDARD TIGHTENING TORQUE
00-9
PC20R-8 PC27R-8
2. TIGHTENING TORQUE FOR NUTS OF FLARED
Use these torques for nut part of flared.
Thread diameter
of nut part
(mm)
Width across flats
of nut part
(mm)
TIGHTENING TORQUE
kgm Nm
1/2" - 20
9/16" - 18
3/4" - 16
7/8" - 14
1.
1
/
16
"
- 12
1.
5
/
16
"
- 12
1.
5
/
8
"
- 12
22
33
17
17
22
27
32
38
50
27
41 2.6 w 0.5
4 w 0.5
6.7 w 2
8 w 2
9.7 w 3
17 w 3
20 w 5
8 w 2
20 w 5
25.5 w 4.9
39.2 w 4.9
65.7 w 19.6
78.5 w 19.6
95.15 w 29.4
166.7 w 29.4
196.2 w 49
78.5 w 19.6
196.2 w 49
COATING MATERIALS
The recommended coating materials prescribed in Komatsu Utility Shop Manuals are listed below:
Nomenclature Code Applications
Adhesives
Loctite 222 Used for low resistance locking of screws, check nuts and adjustment nuts.
Loctite 242
To prevent the loosening of bolts, nuts and plugs and the leakage of oil. Used for
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.
Loctite 270
Used for high resistant locking and for sealing threaded parts, bolts and stud
bolts.
Loctite 542 Used for sealing the union threads for hydraulic tubes.
Loctite 573
Used for sealing rather exact plane surfaces when the option of possible future
dismantling is required.
Loctite 601
Used for high resistant locking of mechanical components that can be removed
only after heating
Loctite 675
Used to lock cylindrical couplings and for the permanent locking of threaded parts,
and also to lock shafts to bearings, gears, pulleys, pins, bushings, etc.
Gasket sealant
Loctite 510
Used by itself on mounting surface on the final drive and transmission cases.
(Clearance between flange surfaces within 0.2 mm).
Loctite 518
Used by itself on mounting flat surface
(Clearance between surfaces within 0.5 mm)
Grease
(Lithium grease)
ASL800050
Applied to bearings, sliding parts and oil seals for lubrication, rust prevention and
facilitation of assembling work.
Vaseline ± Used for protecting battery electrode terminals from corrosion.