ENGINE
4241262-Rev B 3-5
3
Checks and Adjustments
Purging the Fuel System
Adjustment
See Figures 3-3 through 3-5.
!
CAUTION
NOTE
Fuel system will need to be purged of air whenever fuel
filter or fuel lines are removed, fuel tank is completely
emptied, or engine has not been used for an extended
time.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Raise the hood.
NOTE
Be sure fuel tank is filled with clean, fresh diesel fuel and
that the fuel outlet shutoff valve on bottom of fuel tank is
open before performing a purge of fuel system. Place a
suitable container under filter to catch fuel that will flow
from air vent screw hole.
Figure 3-3
3. Loosen air vent screw (1) at top of filter by turning it
counterclockwise two turns.
!
WARNING
Figure 3-4
4. Place throttle control lever (2) in slowest position,
and crank engine over for approximately 10 seconds.
5. When bubbles no longer appear in fuel coming out of
air vent screw hole, tighten air vent screw.
6. Turn ignition switch to off position.
Figure 3-5
7. Loosen air vent screw (3) on fuel pump by turning it
counterclockwise two turns.
Do not purge fuel system when engine is hot.
TN3020
1
The engine may start during this process. Be
careful of injury due to moving components. If
the engine starts, continue purging the fuel
system.
TN3652
2
TN3613
3
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