Lister Petter 0600123LPW3A01, Руководство по ремонту, Страница: 17 / 88

ALPHA series engines worksHoP mAnuAL
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2.9.1 tensioning the drive Belt
When a new belt is correctly fitted and tensioned
a force (F) of 31.0-33.5N (7.0-7.5lbf) is required to
deflect it a distance (d) of 3.5mm (0.14in).
On subsequent checking and adjustment a force (F)
of 22.0-24.0N (5.0-5.4lbf) is required to deflect it a
distance (d) of 3.5mm (0.14in).
Figure 2.9.1 Checking Belt Tension
LPW, LPWS, LPW
CAution
To ensure the correct measurement is obtained
the tensioning measurement must only be taken
on the longest length between pulley centres.
2.9.2 drive Belt tension value
Belt Tension Force (F)
N lbf
New Belt 31.0-33.0 7.0-7.5
Used Belt 22.0-24.0 5.0-5.4
2.10 tHe fueL tAnk
A 12.0 litre (2.5 gal; 3.0 US gal) polypropylene
tank, with a screw-on filler cap is available as an
optional accessory. The tank is secured by two
nylon webbing straps tensioned at the base.
.
Figure 2.10.1 The Fuel Tank
2.10.1 removing the fuel tank
1. Drain the fuel tank into a clean receptacle.
2. Either, remove the fuel pipe at the filter inlet
or, use a pair of pliers to squeeze the tails of
the fuel pipe clip at the tank outlet end together
sufficiently. Move the clip sideways along the
pipe and pull the pipe off.
3. Disconnect the leak-off pipe from the back of the
tank.
4. Slacken, or remove, the two setscrews securing
the straps to the mounting bracket base.
5. Remove the tank.
2.10.2 maintenance of the fuel tank
Remove any sediment from the tank and, if
necessary, flush the tank with clean kerosene and
allow it to drain.
2.10.3 replacing the fuel tank
1. Support the tank and replace it on the mounting
bracket.
2. Replace the two setscrews securing the straps
and tighten them until the tank is secured.
3. Replace the fuel pipe to either the filter or fuel
tank.
4. Push the leak-off pipe onto the tank.
5. Refill the fuel tank.
2.11 tHe fueL Lift PumP
A fuel lift pump is fitted to all engines, except Builds
71 and 72, and is operated from the camshaft by
a push rod.
The pump has a maximum lift of approximately 3m
(10ft) and a maximum head of 600mm (2ft).
note:
it is recommended that the fuel lift pump
diaphragm is inspected at frequent intervals
if it is known the fuel is contaminated. it
should also be inspected at regular intervals
on engines in low duty cycle applications; for
example, stand-by generating sets.
On engines not fitted with a lift pump a blanking
plate is fitted. The plate is secured by two nuts
torqued to 13.5Nm (10.0lbf ft). A lift pump push rod
will not be fitted.
The current industrial Pienne and Corona types of
lift pump are not interchangeable with the earlier
AC Delco pump or the marine type. Full details can
be found in the relevant Master Parts Manual.