Perkins Phaser Series - To Dismantle and to Assemble

FUEL SYSTEM 20B
To dismantle and assemble20B-04
To dismantle
1 Clean the outside surfaces of the fuel lift pump.
2 Remove the push rod (A1).
3 Release the end nut (A2). Remove the plunger
(A3) the suction valve (A4) the spring seat washer
(A13) the spring (A5) and the second spring seat
washer (A13) from the pump body (A6).
4 Remove the priming pump (A8), if fitted, and the
copper washer (A7).
5 Release the delivery valve holder (A9). Remove
the delivery valve (A11) and the "O" ring (A12)
from the body.
To assemble
1 Thoroughly clean inside the body of the lift pump
and ensure that the passages in the body are not
restricted. Carefully clean the valves in clean diesel
fuel. Inspect each valve for damage to the valve
spring and the valve plate. If there is damage,
renew the valve.
2 Put a spring seat washer (A13) in position in the
pump body. Ensure that the flat face of the washer
is toward the bottom of the body. Put the spring
(A5) on the spring seat washer and the other spring
seat washer (A13) on the spring. Put the suction
valve (A4) in position on top of the valve seat
washer. Ensure that the large diameter of the valve
is toward the spring seat washer. Put the plunger
(A3) in position in the pump body over the valve
and spring. Renew the "O" ring (A15) which fits
inside the end nut and the "O" ring (A14) on the
outside of the end nut. Support the pump body, put
the end nut in position on the plunger, compress
the spring and engage the threads of the end nut
with the threads in the pump body. Tighten the end
nut to 42 Nm (31 lbf ft) 4,3 kgf m. Put the push rod
in position in the end nut.
3 Put a new "O" ring (A12) in position in the pump
body. Put the delivery valve (A11) in position on the
"O" ring. Ensure that the large diameter of the
valve is toward the "O" ring. Renew the "O" ring
(A10) on the delivery valve holder (A9). Fit the
delivery valve holder and tighten to 42 Nm (31 lbf
ft) 4,3 kgf m.
4 Renew the copper washer (A7) and fit the
priming pump (A8). Tighten the priming pump to
47 Nm (34 lbf ft) 4,8 kgf m.
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PA206
Perkins Phaser/1000 Series, April 1995 20B.05