Replacement Of The Hose (Models Dmf - Dpf) - PREVOST DMF Série Notice De Montage Et D'utilisation

4 - REPLACEMENT OF THE HOSE (MODELS DMF - DPF)

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).
1. Unscrew the revolving coupling by unfastening the 28 mm nut (Figure A).
2. Insert a 5 mm hexagonal wrench into the axle of the spring linkage shaft. Unfasten the nut with a 19
mm wrench, holding in place with the hexagonal wrench (figure B). Release the spring by turning the
hexagonal wrench slowly clockwise.
3. Remove the 4 attachment screws from the two half-casings.
4. Remove the cover and the hose guide end fitting (Figure C).
WARNING: DO NOT OPEN THE SPRING CASING, SPRING REPAIR OR REPLACEMENT OPERATIONS
MUST ONLY BE PERFORMED BY QUALIFIED TECHNICIANS.
5. Unscrew the coupling and replace the hose.
6. Reel the new hose on the drum, insert it in the guiding rollers and fit the limit stop approximately 50 cm
from the end.
7. Reassemble the reel, following the operations in reverse order.
Grease the supports and catch if required.
8. After assembling the half-casings, 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 for DMF 0812 and
DMF 0815, 5 turns for DMF 1010, 7 turns for DPF 1012).
9. Hold the wrench in position and fasten the hub with the two screws.
Reassemble the revolving joint after greasing it. 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 11).
Slide the limit stop to the required distance from the end of the hose (minimum 1 metre).
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