Mitsubishi 6M70 - Oil Pump, Oil Strainer Disassembly and Assembly

12-18
Disassembly sequence
• The oil strainer, the oil pipe and the oil pump must all be removed together as an assembly.
• Do
not disassemble the oil pump unless defects are evident.
• The gear and case assembly is not serviceable. If the gear and case assembly appears defective, replace it.
Assembly sequence
Follow the disassembly procedure in reverse.
Service standards (Unit: mm)
Location Maintenance item Standard value Limit Remedy
5, 12 Clearance between drive gear shaft and cover 0.04 to 0.07 0.15 Replace
5, 6, 12
Clearance between driven gear shaft and case, and
that between the shaft and cover
0.04 to 0.07 0.15 Replace
6, 12
Clearance between case and tooth tips of each gear 0.2 to 0.29 0.35
Replace
Difference between case depth and height of each gear 0.05 to 0.12 0.15
8 Relief valve spring installed load (installed length 47.7)
190 ± 11 N
{19.4 ± 1.1 kgf}
179 N
{18.3 kgf}
Replace
9 Relief valve opening pressure
0.9 MPa
{9 kgf/cm
2
}
0.9 MPa
{9 kgf/cm
2
}
Replace
10, 11 Clearance between idler shaft and idler gear 0.03 to 0.06 0.15 Replace
11,
*
a Backlash between idler gear and crankshaft gear 0.08 to 0.2 0.35 Replace
11,
*
b Backlash between idler gear and oil pump gear 0.076 to 0.196 0.35 Replace
1 Oil strainer
2 Gasket
3 Oil pipe
4 Gasket
5 Cover
6 Driven gear
7 Ring
8 Relief valve spring
9 Relief valve
10 Idler shaft
11 Idler gear
12 Gear and case
13 Gasket
*
a: Crankshaft gear
*
b: Oil pump gear
: Locating pin
: Non-reusable parts
+0.1
0
+1
0
M
ITSUBISHI 6M70 OIL PUMP, OIL STRAINER