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8
8.12 REPLACING THE NEGATIVE-PRESSURE VENT VALVE
Important
• Replacement may be carried out with the engine
installed on the machine.
1. Switch off the engine and leave to cool.
2. Loosen nut (A).
3. Loosen the clamps and disconnect the pipes.
4. Take off the negative-pressure vent valve (B).
5. Install the negative-pressure vent valve.
6. Tighten the nut to a final torque of 22Nm.
7. Connect the pipe to the coupling.
8.13 REPLACING THE PREHEATING GLOW PLUGS
Important
• Replacement may be carried out with the engine
installed on the machine.
1. Switch off the engine and leave to cool.
2. Remove the intake manifold (see "Disassembling
the intake manifold").
3. Disconnect the electric cable.
4. Disconnect the preheating glow plugs.
5. Install the new preheating glow plugs and tighten
the screws to a torque of 20 Nm.
6. Reconnect the electric cable.
7. Mount the intake manifold (see "Assembling the
intake manifold").
92
REPLACING PARTS
Caption
1) Nut
2) Bushing
3) Valve body
4) Diaphram
5) Bottom plate
6) Quicklock ring
7) O-ring
8) Collar
9) O-ring
10) Seal collar
11) Spring
12) Gas vent pipe
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Service Manual LDW FOCS 502 automotive _ cod. ED0053027270 - 3° ed_rev. 02
B
A
pre-heating glow plugs
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