Timing Gears, Camshaft And Fuel Camshaft - wsm STW37 Workshop Manual

STW34, STW37, STW40, WSM

(2) Timing Gears, Camshaft and Fuel Camshaft

Push Rod Alignment
1. Place the push rod on V blocks.
2. Measure the push rod alignment.
3. If the measurement exceeds the allowable limit, replace the
push rod.
Push rod alignment Allowable limit
Oil Clearance between Tappet and Tappet Guide Bore
1. Measure the tappet O.D. with an outside micrometer.
2. Measure the I.D. of the tappet guide bore with a cylinder gauge,
and calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit or the tappet is
damaged, replace the tappet.
Factory specification
Oil clearance between
tappet and tappet guide
bore
Allowable limit
Tappet O.D. Factory specification
Tappet guide bore I.D. Factory specification
Timing Gear Backlash
1. Set a dial indicator (lever type) with its tip on the gear tooth.
2. Move the gear to measure the backlash, holding its mating gear.
3. If the backlash exceeds the allowable limit, check the oil
clearance of the shafts and the gear.
4. If the oil clearance is not proper, replace the gear.
Factory specification
Backlash between idle
gear and crank gear
Allowable limit
Factory specification
Backlash between idle
gear and cam gear
Allowable limit
Factory specification
Backlash between idle
gear and injection pump
gear
Allowable limit
Factory specification
Backlash between crank
gear oil pump gear
Allowable limit
1-S68
ENGINE
0.25 mm
0.0098 in.
9Y1211109ENS0103US0
0.020 to 0.062 mm
0.00079 to 0.00244 in.
0.07 mm
0.003 in.
23.959 to 23.980 mm
0.94327 to 0.94409 in.
24.000 to 24.021 mm
0.94489 to 0.94570 in.
9Y1211109ENS0104US0
0.0415 to 0.1122 mm
0.94327 to 0.94409 in.
0.15 mm
0.0059 in.
0.0415 to 0.1154 mm
0.001634 to 0.004543 in.
0.15 mm
0.0059 in.
0.0415 to 0.1154 mm
0.001634 to 0.004543 in.
0.15 mm
0.0059 in.
0.0415 to 0.1090 mm
0.001634 to 0.004291 in.
0.15 mm
0.0059 in.
9Y1211109ENS0105US0
KiSC issued 11, 2014 A