Toro Workman 3000 Series Service Manual page 91

Timing Belt Tensioner Installation
1. Install tensioner spring and timing belt tensioner.
2. Hook tensioner spring onto bent section of timing belt
tensioner bracket and onto cylinder block stopper pin.
3. Put timing belt tensioner as close as possible to water
pump and tighten tensioner nut to temporarily secure in
position.
Timing Belt Installation
1. Align triangle mark on camshaft sprocket with mark
on timing belt rear cover.
2. Align notch on crankshaft sprocket flange with mark
on front case.
3. Align triangle mark on oil pump sprocket with mark on
front case. Insert a 8 mm (.31 in.) diameter rod into plug
hole on left side of cylinder block to a length of 65 mm
(2.56 in.) or more. Check to make sure range of move-
ment of oil pump sprocket is within specification.
Direction of rotation
Clockwise
Counterclockwise
4. If range of movement of oil pump sprocket is outside
range of standard value:
A. Remove rod from plug hole on left side of cylinder
block.
B. Turn oil pump sprocket one revolution to a posi­
tion where rod can be re–inserted.
C. Repeat step 3.
Workman 3000/4000 Series
Oil pump sprocket
range of movement
4 – 5 teeth
1 – 2 teeth
Page 3 – 53
Tensioner spring
Figure 86
Crankshaft
sprocket
Figure 87
Clockwise
direction
Counterclockwise
direction
Figure 88
Liquid Cooled Gas Engine
Timing belt tensioner
Camshaft
sprocket
Oil pump
sprocket
Oil pump
sprocket