Toro Workman 3000 Series Service Manual page 131

2. Check counterbalance shaft to bearing oil clearance.
Replace bearing and/or counterbalance shaft if worn or
damaged.
Front 0.035 – 0.068 mm (.0014 – .0026 in.)
Rear 0.035 – 0.071 mm (.0014 – .0028 in.)
3. Check front case oil holes for clogging and clean if
necessary. Check front case and replace if cracked or
damaged.
4. Check front oil seal for wear, damage or hardening.
Replace front oil seal if necessary. It is recommended
that you install a new front oil seal when rebuilding the
engine.
Front Case, Counterbalance Shaft
and Oil Pan Reassembly
1. Install counterbalance shaft rear bearing:
A. Install guide pins of special tool (bearing installer)
in tapped hole of cylinder block.
B. Mate ratchet ball of bearing installer and oil hole
of rear bearing, then install bearing in bearing in­
staller.
C. Apply engine oil to bearing outer circumference
and bearing hole in cylinder block.
D. Insert installer by mating it with guide pin, then
press in the rear bearing.
2. Install counterbalance shaft rear bearing:
A. Apply engine oil to bearing outer circumference
and bearing hole in cylinder block.
B. Use special tool to press in the front bearing.
Workman 3000/4000 Series
Oil hole
Page 3 – 93
Guide pin
Ratchet ball
Figure 188
Guide pin
Figure 189
Figure 190
Liquid Cooled Gas Engine