Injection Pump Servicing (Fig. 41)
A built-in three-cylinder injection pump is mounted
on the right-hand side of the cylinder block. It
consists of a pump element (plunger and barrel assem•
bly), a delivery valve, a tappet and a smoke set unit. As
the pump cam rotates, the plunger is moved up and
down through a prescribed stroke, delivering fuel to the
engine cylinders. A key operated stop system is pro•
vided.
Fuel Injection Control
The fuel injection rate is controlled by changing the
effective stroke of the plunger within the barrel. The
plunger is rotated by the control pinion which meshes
with the plunger lower collar to directly turn the plunger.
As the engine turns, the injection pump camshaft rotates
to move the control rack by way of the governor weights,
governor sleeve, and lever. The control rack slides to
turn the control pinions. Movement of the control rack to
the right decreases the fuel injection rate and movement
to the left increases the rate.
Figure 41
1. Air vent screw
2. Stopper
3. Control rack
4. Return spring
5. Gasket
11. Spring
12. Delivery valve
13. Valve seat
14. Plunger barrel
15. Adjusting plate
16. Control pinion
17. Upper seat
6. O-ring
7. Plunger
8. Lower seat
9. Tappet
18. Plunger spring
19. Pump housing
10. Valve holder
Fuel System Service
Page 4 - 38
Groundsmaster® 300 Series
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 300, Toro Groundsmaster 328 D, Toro Groundsmaster 92801SL |
| Download File |
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| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
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| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
(2 votes, average: 5 out of 5)
Lawn and Garden readers have rated Toro 92801SL Rev I Groundsmaster 300 Series Groundsmaster 328 D Service Manual 5.0 out of 5.0 based on 2 product reviews. Need 328D. Manual pdf. Will rate after finding manual
t has been a very reliable machine but getting parts is hard and not cheap to buy , generic parts has been cost effective and reliable , i am unable to get a wiring circut diagram for this unit as most problems are electrical problems