Precautions for Use 2. Handling common parts [1] Handling packing
AL
• Replace packing, gasket, copper gaskets or other fluid sealing parts with new ones as a general procedure. • Coat the gasket for particular areas with liquid gasket. Cautions when applying liquid gasket • Leather packing should be assembled after being immersed in oil.
Class
Symbol
Hardness
Blue 1 dot
JIS B 2401 1A
1A
70 ± 5
Blue 2 dots
JIS B 2401 1B
1B
Red 1 dot
JIS B 2401 2
Yellow 1 dot
Usage
E
Color
IN
TE RN
[2] O-rings • If an O-ring has become hardened after a long storage, discard it even if it is unused. • Use only O-rings specified in the parts description list. Especially for the lubricated areas in the engine, O-rings made of special materials like silicon rubber are used to improve heat resistance and prevent early deterioration. Use only genuine parts. • Periphery of an O-ring is marked with either blue or green dots for identification purposes described below. Type of rubber NBR
90 ± 5
Mineral oil resistant and for high pressure
NBR
2
70 ± 5
Gasoline resistant
NBR
JIS B 2401 3
3
70 ± 5
Vegetable oil resistant
CR
No dot
JIS B 2401 4C
4C
70 ± 5
Heat and cold weather resistant
Silicon rubber
Green 1 dot
JIS B 2401 4D
4D
70 ± 5
Heat and oil resistant
CO US N F E ID O E F N TS TI M AL GL : F O OR BA T L H
Mineral oil resistant and for low pressure
Fluorine rubber
• Remove scratches, contaminants, paints, oil or old liquid gasket completely from the surfaces to which liquid gasket will be applied. • Apply specified liquid gasket on the application surface evenly and dry the surface for a few minutes. • When the surface becomes dry to the touch, attach the gasket. • Coat O-rings with oil before installing to avoid causing flaws. Pay special attention to silicon rubber, which is easily torn apart.
[3] Handling oil seals • Pay attention to the direction of oil seal lips.
• Be careful not to contaminate oil seals and make sure there is no rust or flaws (especially on lip surfaces).
MSM-17-04-001EN
16 16
