Thermostats And Thermostat Housing - Perkins 2800 Workshop Manual

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Thermostats and thermostat housing

To remove and to fit Operation 12-10
To remove
1 Drain the coolant until the level is below the thermostat housing (A1).
2 Disconnect the cable (A3) from the coolant temperature sensor.
3 Release the hose clips (A2) and disconnect the pipe and hose from the top of the unit.
4 If the thermostats are to be removed, loosen all five bolts of the thermostat housing; then remove fully the
three bolts (A4) which retain the thermostat housing on the cylinder head. If the thermostat housing is to be
removed without access to the thermostats, do not loosen the five bolts; remove only the three retaining bolts
(A4).
5 Lift carefully the assembly to separate it from the coolant bobbin (A5) at its base.
Note: If relevant, remove the two short bolts which remain, separate the two halves of the assembly and
remove the thermostats.
Workshop Manual, TSD3450E, Issue 1 121