Checking The Oil Strainer; Assembling The Oil Pump - Yamaha XV19SW Service Manual

2. Measure:
• Ball spring force
• Relief valve spring force
Out of specification → Replace the defective
part(s).
Ball spring
Installed compression spring
force
2.23 N (0.60 lb) (0.27 kgf) or less
Installed length
29.4 mm (1.12 in)
Relief valve spring
Installed compression spring
force
52.4 N (11.78 lb) (5.34 kgf) or
less
Installed length
16.8 mm (0.66 in)
a. Spring force
b. Installed length
EAS24990

CHECKING THE OIL STRAINER

1. Check:
• Oil strainer "1"
Damage → Replace.
Contaminants → Clean with solvent.
1
EAS25000

ASSEMBLING THE OIL PUMP

1. Lubricate:
• Inner rotor
• Outer rotor
• Oil pump shaft
(with the recommended lubricant)
Recommended lubricant
Engine oil
2. Install:
• Oil pump housing 2 "1"
• Ball guide "2"
• Ball "3"
• Oil seal "4" New
• Circlip "5" New
• Oil seal "6" New
• Oil pump shaft "7"
• Pin "8"
• Oil feed pump inner rotor "9"
• Oil feed pump outer rotor "10"
• Relief valve "11"
• Relief valve spring "12"
• Oil pump housing cover 2 "13"
Oil pump housing cover 2 screw
7 Nm (0.7 m·kg, 5.1 ft·lb)
• Pin "14"
• Oil scavenging pump inner rotor 2 "15"
• Oil scavenging pump outer rotor 2 "16"
• Ball spring "17"
• Pins "18"
• Oil strainer "19"
• Oil pump housing 1 "20"
• Pin "21"
• Oil scavenging pump inner rotor 1 "22"
• Oil scavenging pump outer rotor 1 "23"
• Oil pump housing cover 1 "24"
Oil pump housing cover 1 screw
7 Nm (0.7 m·kg, 5.1 ft·lb)
NOTE:
When installing the inner rotor, align the pin in
the oil pump shaft with the groove in the inner ro-
tor.
5-99
OIL PUMP