SKF P203 - Repairs; Replacing Pump Element and Pressure Limiting Valve

63
12 Repairs
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WARNING
Risk of injury
At a minimum, the following safety
measures must be taken before any repairs:
• Unauthorized persons must be kept away
•
Mark and secure the work area
•
Depressurize the product
•
Isolate the product, and lock and tag it out
•
Check to ensure live voltage is no longer
present
•
Ground and short-circuit the product
• Cover any adjacent live parts.
12.1 Replacing pump element and
pressure limiting valve
Fig.
39
Replacing pump element and pressure limiting valve
NOTE
The characteristics of the new pump element must
match the characteristics of the pump element to be
replaced.
Replace the pump element as instructed below:
1. Remove the defective pump element (Fig. 39/1) from
the pump housing together with the pressure limiting
valve (Fig. 39/3), by unscrewing on the hexagon of the
pump element.
2. Screw the new pump element (Fig. 39/1) together with
a new packing ring into the pump housing. Remove plug
if necessary (Fig. 39/2).
– The torque for tightening the pump element is
20 Nm ± 2.0 Nm [14.75 ft.lb. ± 1.4 ft.lb.]
3. Afterwards, screw a new pressure limiting valve
(Fig. 39/3) into the pump element.
– The torque for tightening the pressure limiting valve
is 6 Nm -0.5 Nm [4.43 ft.lb. -0.07 ft.lb.]