Toro Groundsmaster 300 Series Service Manual page 72

Injection Pump Inspection (Fig. 48)
1. Inspect the contact surfaces of the delivery valve
seat. Replace the Delivery Valve Assembly if defective.
2. Inspect the plunger and barrel for wear, damage or
rust. Check to see that the plunger slides smoothly in
the barrel. Replace the Pump Element Sub-Assembly if
defective.
3. Inspect the Control Rack and Pinions for worn or
damaged teeth. Replace worn or damaged compo-
nents.
4. Inspect the Tappet outside diameters, rollers and
shafts for wear or damage. Replace damaged or worn
components.
Injection Pump Reassembly (Fig. 49, 50)
NOTE: Wash each part thoroughly in clean diesel fuel
as it is reassembled.
1. Install the Control Rack, Smoke Set and Ungleich
plates, retainer springs and fasteners.
2. If the adjusting plate assemblies have been removed,
reinstall them, paying careful attention to install them
according to the marks scribed on the pump housing
and plates.
3. Install the Plunger Barrel into the bore in the top of
the Pump Housing. Make sure that the groove in the
barrel aligns with the pin in the side of the bore.
4. Install the delivery valve and seat, gasket, spring,
0-ring and Valve Holder and hand tighten the assembly.
Be careful not to damage the 0-ring when installing it
onto the valve holder.
5. Install the control pinion by positioning it so that the
deeply cut tooth is aligned with the grooves in the
Control Rack.
Fuel System Service
Alignment of pinions and control rack
Page 4 - 42
Figure 48
Figure 49
®
Groundsmaster 300 Series