Replacement Of The Hose - PREVOST DRF 0812 Montage- Und Gebrauchanweisung

4. REPLACEMENT OF THE HOSE

A
D
Warning: Before performing any operation, position the stop at the end of the hose, reel the
hose completely and make sure that the spring is completely slackened.
Use a hose with dimension and pressure characteristics suited to the use (see table of
characteristics, page 8)
1) Take the inlet hose off by removing the plastic cap and the seeger (figure A).
2) Insert a 5 mm hexagon driver into the 6 flats of the spring hub. Unfasten the nut with a 19 mm
driver, holding in place with the hexagon driver (figure B). Release the spring by turning the
hexagon driver slowly clockwise.
3) Remove the nut and the 4 attachment screws from the two half-casings.
4) Remove the half-casing and the hose guide end guide and take the drum out (figure C).
WARNING: DO NOT OPEN THE SPRING CASING, SPRING REPAIR OR REPLACEMENT
OPERATIONS MUST ONLY BE PERFORMED BY QUALIFIED TECHNICIANS.
5) Take the spring hub out of the drum (figure D).
6) Unfasten the central screw and remove the bushing (figure E).
7) Separate the hub from the drum and take the tube coupling out of the hub (figure F). Remove the
o-ring.
8) Cut the collar in order to retrieve the coupling and replace the tube.
9) Position the o-ring on the coupling and insert the coupling into the hub hole.
10 Reposition the hub in the drum by fastening the central screw and insert the spring hub.
11) Fit the stop approximately 1 m from the opposite end of the hose and reel the new hose on the
drum.
12) Grease if required. Reassemble the reel, following the operations in reverse order.
13 Insert a hexagonal wrench in the hub hole. Turn the wrench anti-clockwise so that the limit stop is
in contact with the hose guide end fitting.
Prestress the spring by continuing to turn the wrench anti-clockwise (4 turns).
14) Hold the wrench in position and fasten the nut.
Perform a functional check. If the hose does not go in completely or does not come out completely,
readjust the tension of the spring (point 13).
15) Reposition the inlet hose and the plastic cap
B
E
10
C
F