Toro Groundsmaster 328-D, Service Manual

Page: 77 / 402

Cylinder Head Overhaul
This section explains disassembly, inspection, repair,
and reassembly of the cylinder head and its compo-
nents as outlined below:
Cylinder Head Removal
Cylinder Head Servicing
Valve Guides
Valves
Valve Seats
Valve Springs
Rocker Arms, Bearings, Shaft
Cylinder Head Reassembly and Installation
IMPORTANT: When overhauling the cylinder head
and cylinder block it is important that many of the
components be reinstalled in the exact location
from where they were removed. These items are
noted in the text. It is useful to construct a rack
where these components can be stored, in order,
until reassembly.
Cylinder Head Removal (Engine Removed) (Fig. 52, 53)
1. Remove the fan shaft bracket, muffler, and rear motor
mount.
2. Disconnect the water bypass hose from the cylinder
head.
3. Remove the injection pipes (injection pump) to noz-
zles.
4. Remove the rocker cover and breather tube.
5. Loosen the two bolts and the cap screw which retain
the rocker shaft assembly, and remove the rocker shaft.
6. Remove the push rods. Place each push rod into a
marked holder so that it can be replaced in the original
position.
7. Loosen and remove the cylinder head bolts in the
sequence shown. Lift the cylinder head from the cylinder
block. It may be necessary to tap the cylinder head with
a wooden mallet to break the seal of the head gasket.
Place the cylinder head on a flat, clean surface.
9. Remove the thermostat housing and the thermostat.
10. Remove the glow plug lead wires and glow plugs.
11. Remove the nozzle holder bolts and nozzles.
12. Remove the used cylinder head gasket. Use a
scraper to remove all traces of gasket material. Pay
particular attention not to damage or scratch the cylinder
head or cylinder block surface.
Figure 52
Figure 53
Groundsmaster
®
300 Series Page 4 - 47 Cylinder Head Overhaul