SECTION 4 -- LUBRICATION AND MAINTENANCE
4--31
GENERAL MAINTENANCE
BLEEDING THE FUEL SYSTEM
Bleeding procedure -- Figs. 68 and 69
During long periods when the tractor is not used,
when the filter and fuel lines are removed or when
there is no fuel in the tractor, air may enter the fuel
system.
The presence of air makes it difficult to start the
engine and it therefore needs to be bled as follows
when the fuel tank is refilled:
1. Unscrew the bleed plug (1) fig. 68 by
approximately two turns.
2. Actuate lever (1) fig. 69 until fuel without air
bubbles spurts from the bleed hole.
3. Tighten plug (1) fig. 68.
4. After tightening the bleed plug (1) fig. 68, actuate
lever(1)fig69afewtimes.
5. Turn the ignition key to position C, as shown in
Section 2, fig. 18, page 2--11. As soon as the
engine starts, release the key.
NOTE: Y our engine is fitted with a rotary injection
pump, whose internal components must be
protected from rusting if not used for over a month.
Therefore, before stopping the tractor, mix PROT 10
W/M oil with the fuel in the tank in a proportion of
10% and run the engine for approximately half an
hour.
68
23731A
1
69
BLEEDING THE HYDRAULIC BRAKE
SYSTEM
Bleeding procedure -- Figs. 70 to 73
Whenever work is carried out on the front brake hy-
draulic system, the air must be bled from the syst em.
Proceed as follows.
1. Thoroughly clean the external parts of the unit
around the hydraulic fluid tank cap (2) fig. 70 and
the bleed screws (1--2) fig. 71.
2. Make sure that the hydraulic fluid in the tank (1)
70 is maintained up to the full mark both before
and during the bleeding operations.
NOTE: Filter all drained oil before reusing.
1
2
TRE0305A
70
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