Simrad AP27 Bedienerhandbuch PDF herunterladen (Seite 20)

Simrad Reversible Pump RPU80/160/300

18 20220422N

O-ring

European

type

fitting

US type

fitting

Pump

housing

4 INSTALLATION

4.1 Mechanical Installation

Siting

The pump unit should be sited where it is most practical

between rudder cylinder and helm pump, however, it should not

be mounted in a wet area. If the pump unit is sited higher than

the rudder cylinder, air bubbles in the oil coming from the

rudder cylinder could pass through the pump unit on the way to

the expansion tank in the steering wheel pump. This will disturb

the oil flow as the air bubbles pass through.

The pump unit should be mounted horizontally, with the pipe

connections/fittings pointing upwards. Use a 90° bracket if

mounted on a bulkhead. It could however be mounted directly

on a bulkhead, but never with the motor pointing downwards, as

oil leak/sweating from a poor shaft seal can easily penetrate the

motor and destroy it.

Fittings

For pump units manufactured before January 1999, the fittings

are factory mounted on the pump housing.

From January 1999 a different type of fitting is used. The new

fitting has an O-ring seal between the fitting and the pump

housing.

The threads are changed from ¼” NPT to 7/16”-20 UNF both on

the European and the U.S. version. The pipe connection remains

the same as before.

Note ! Because the threads are different the new fittings cannot be used

with an old pump and vice versa.

The fittings are easily inserted and less critical with regard to

tightening torque. Consequently the fittings need not be

mounted at the factory. They are now supplied with the pumps

in a plastic bag for mounting during pump installation.

Protection caps cover the threads in the pump housing during

transportation.

Note ! As these fittings have o-

ring sealing there is no

need for additional

sealing compound.

Use following procedure

when mounting the

fittings on the pump;

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