9-8
Chapter 9 LUBRICATION SYSTEM
2.2 Oil Pump and Safety Valve - Inspect
2.2.1 Backlash Between Oil Pump Gear and Idler
Gear - Measure
Measure the backlash between oil pump gear and idler gear.
If the value exceeds the limit, replace the gears with new
ones.
2.2.2 Drive Gear and Driven Gear Backlash
- Measure
Measure the backlash between drive gear and driven gear. If
the value exceeds the limit, replace the gears with new ones.
2.2.3 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
2.2.4 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
Item Standard value Limit value
Backlash between
oil pump gear and idler gear
0.087 to 0.316 mm
[0.0034 to 0.0124 in.]
0.500 mm
[0.0197 in.]
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
0.100 to 0.196 mm
[0.0039 to 0.0077 in.]
0.350 mm
[0.0138 in.]
Thickness gauge
Item Standard value Limit value
Side clearance between
gear width and case
depth
0.050 to 0.114 mm
[0.0020 to 0.0045 in.]
0.250 mm
[0.0098 in.]