Mitsubishi S12A2, Service Manual

Page: 233 / 354

9-15
Chapter 9 LUBRICATION SYSTEM
2.3 Oil Pump and Safety Valve - Inspect
2.3.1 Drive Gear and Driven Gear Backlash - Mea-
sure
Measure the backlash between drive gear and driven gear.If
the value exceeds the limit, replace the gears with new ones.
2.3.2 Clearance Between the Gear Teeth and Case -
Measure
Measure the top clearance between drive/driven gear teeth
and case housing.If the value exceeds the limit, replace the
gear or case with a new one.
Clearance Between the Gear Teeth and Case -
Measure
2.3.3 Side Clearance Between Gear Width and Case
- Measure
Measure the side clearance between the gear width and case
depth.If the value exceeds the limit, replace the gear or case
with a new one.
Side Clearance Between Gear Width and Case -
Measure
2.3.4 Drive/Driven Gear Shaft Outside Diameters and
Bushing Inside Diameters - Measure
(1)
Check the gear teeth.If any defect is found, replace the
gear with a new one.
(2)
Measure the drive/driven gear shaft outside diameters
and bushing inside diameters.If any of the gear or bush-
ing exceeds the limit, replace them as a set with new
ones.
Item Standard value Limit value
Drive gear and driven
gear backlash 0.100 to 0.200 mm
[0.0039 to 0.0079 in.]
0.400 mm
[0.0157 in.]
Item Standard value Limit value
Top clearance between
gear teeth and case 0.150 to 0.230 mm
[0.0059 to 0.0091 in.]
Tip clearance
0.350 mm
[0.0138 in.]
Item Standard value Limit value
Side clearance
between gear
width and case
depth
P/N:
32635-20010 0.130 to 0.200 mm
[0.0051 to 0.0079 in.]
0.250 mm
[0.0098 in.]
P/N:
32635-10020 0.130 to 0.300 mm
[0.0051 to 0.0118 in.]
0.350 mm
[0.0138 in.]
Item
Nominal
value
Standard value Limit value
Gear shaft out-
side diameter
ø34 mm
[1.34 in.]
33.944 to 33.960 mm
[1.3363 to 1.3370 in.] 33.920 mm
[1.3354 in.]
Bushing inside
diameter 34.000 to 34.025 mm
[1.3385 to 1.3395 in.] 34.055 mm
[1.3407 in.]