Valve Clearance Adjustment - Toro Groundsmaster 455-D Service Manual

Cylinder Head Tightening
1. Install new washers on the bolts.
2. Pre-tighten the bolts in the order shown (Fig. 84) to a
torque of 30 Nm (22 ft-lb).
3. Tighten the bolts in the order shown to a torque of
70 Nm 52 ft-lb).
4. Tighten each bolt in the order shown an additional
120° ± 2°.
NOTE: The special cylinder head bolts (Item B) do not
require re-tightening. The bolts can be removed and
re-installed 5 times before replacing with new bolts.

Valve Clearance Adjustment

NOTE: If all valve parts are re-installed in their original
location it should not be necessary to adjust valve
clearance, unless the head has been machined or val­
ves ground.
1. Install the camshaft gear. (Fig. 85, Item 1).
2. Check the valve clearance:
Inlet
Exhaust
Tolerance
Set "on the rock" Inlet 4, Exhaust 4
Check Inlet 1, Exhaust 1
Inlet 2, Exhaust 3
Groundsmaster 455-D
Units: mm
Running Clearance
0.15
0.30
± 0.04
Inlet 1, Exhaust 1
Inlet 4, Exhaust 4
Inlet 3, Exhaust 2
Page 3 - 57 Rev. B
Figure 84
Figure 85
Engine