Specifications

Section 7: Servicing 35/44
If the turbine does not turn or does so very slowly:
Install a nozzle 2-4 mm larger on the rain gun (pos. 4, photo A). Try again and check the rain
gun throw. If necessary try another nozzle to get a better throw (if the nozzle is too big or too
small for the water volume, the throw will be shortened. Check on the in-feed gauge (pos. 1
photo H) if the pressure still exceeds 4 bar. If it is less, increase the pressure to reach the
optimum level.
B) If the turbine still does not turn:
Detach the water supply line and dismantle the coupling by removing the four screws on the
flange (pos. 11, photo H).
Check the small orifice (where the black tapered nozzle is inserted) for foreign bodies. Remove
the tapered nozzle and check if the impeller moves easily. To make this check, use a screwdriver
to push up the fin you see in the smaller orifice (where the tapered nozzle was seated before).
If the impeller does not move, remove the eight Phillips screws on the turbine casing, open
the casing and remove the foreign body that is preventing the impeller from turning.
If the impeller still does not move, call your nearest RM Technical Assistance Centre.
C) The turbine turns but the machine does not reel in the hose.
Check if lever (pos. 7, photo H) is perfectly engaged (move it a couple of times) and then
check if the gear lever is set on one of the four speeds.
Try changing speed with a firm quick movement selecting first one speed and then the others.
Make sure you are not leaving the gear lever between two gear positions.
These operations must be done with the turbine supplied with water
under pressure (that is, the turbine is turning).
D) If the turbine turns but the gear unit intake shaft does not move:
Check that the impeller is correctly fixed on the turbine shaft by opening the outside turbine
body.
E) The turbine turns but when the reel in is engaged (pos. 7, photo H) it stops:
- if the problem persists even at the first speed, follows the instructions under A) above.
- if the problem continues after these checks, change the nozzle in the turbine with a
smaller diameter.
When you are turning the PTO, if the force of the handle decreases in one or two points, this
means that the gear unit is damaged. Refer the matter to your nearest RM Technical Service
Centre.
To do this: dismantle the in-feed fitting by removing the four screws on the flange (pos. 11,
photo H). Remove the nozzle and replace it with one with a smaller diameter (it is normally
enough to reduce the diameter by 2-4 mm).
The nozzle used in the turbine is the same type as the one in the rain gun and so check if you
already have one in the machine kit. If the one installed in the rain gun is not the same, it can
be ordered.
F) The turbine turns normally but the gear unit stops after a few turns. Follow the steps
described under point C): If the problem remains, cut off water supply, put the gear lever in
4th gear and hold lever (pos. 7 photo H) engaged. Attach the crank to the PTO and turn it
counterclockwise for two complete turns. When you are turning the PTO, if the force of the
handle decreases in one or two points, this means that the gear unit is damaged. Refer the
matter to your nearest RM Technical Service Centre.