Gesipa 8000 - Pressure Booster Repair Instructions; To replace compression spring in large pressure booster

23 Pressure Booster Repair Instructions
Note!
Caution!
Pressure Booster Repair Instructions
Observe safety information!
To replace compression spring in large pressure booster
- Remove pressure booster (see Section 22 "Removing and In-
stalling Pressure Booster").
- Extract hydraulic oil through hole in cover in designated oil
reservoir and dispose of in an environmentally acceptable
manner.
- After undoing the stud bolts, remove cover with sensor, float
and sight glass.
- Undo locking socket from valve plate and remove compres-
sion spring with plate.
- Remove barrel seal.
- After releasing the hexagon head cap screws, detach flange.
- Pull out throttle cylinder.
- Using metered compressed air (2 bar) via the air connection
in the baseplate, move the plunger into the upper end posi-
tion.
- Unscrew valve plate together with O-ring from valve stem.
- Release collar screw with pin wrench and unscrew.
Collar screw is secured with Loctite.
- Remove barrel and converter piston as well as valve stem.
- Shut off compressed air.
- Release hexagon nuts on tie rod (do not completely unscrew)
The top plate is under powerful spring pressure! While unscrew-
ing the tie rods press against the top plate to take up the spring
force.
- Detach top plate.
- Replace compression spring.
- Reassemble in reverse order.
- When installing the locking socket, use a bar magnet to pull the valve stem with valve plate
through the opening in the flange. The valve plate is to be adjusted in this position such that,
by applying compressed air (2 bar) via the air connection in the baseplate, the locking socket
moves by 1.5 - 1.9 mm to the end position.
23
Wear safety goggles!
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