HARDI-EVRARD ALPHA PLUS 4100 - Fan Transmission Maintenance; Fan Transmission Priming Procedure; Fan Transmission Pressure Adjustment

ALPHA PLUS HARDI NOVA
MM AA II NN TT EE NN AA NN CC EE
CHAPTER
55-
21
The transmission feed and working pressure are checked as follows :
- Connect a 40 bar (580 p.s.i.) pressure gauge to the feed pressure connector (P2), and a 400 bar (5800 p.s.i.)
pressure gauge at the working pressure connector (P1).
- Set the engine at 2000 r.p.m. check with a tachometer
- Set the blower at max. speed
- Check the feed and working pressure :
Feed pressure,
PP22
15-20 bar (218-290 p.s.i.)
Working pressure,
PP11
, approx.
18 m 180 bar (2610 p.s.i.)
20 m 190 bar (2755 p.s.i.)
21 m 200 bar (2900 p.s.i.)
24 m 210 bar (2610 p.s.i.)
27 m 240 bar (3721 p.s.i.)
28 m 240 bar (3721 p.s.i.)
- Adjust feed pressure if necessary.
Failure to reach feed and working pressure indicates that the transmission needs overhauling.
FFaann ttrraannssmmiissssiioonn pprreessssuurree aaddjjuussttmmeenntt
DD
BB
PP22
DD
SS
AA
Pressure port
BB
Return port
DD
Drain port
PP11
Connector for working pressure measurement
PP22
Connector for feed pressure
RR
Adjustment screw for feed pressure
SS
Suction port
AA
RR
PP22
AA
BB
- Fill the oil reservoir with fresh, clean oil to the top of sight glass.
- Fill the pump housing with oil through the drain pipe (D) which is dismantled at the
tank connection. Reconnect and tighten.
- Check the oil level in the gear box
- Remove the drain hose (D) from the motor outside the blower housing.
- Set the fan r.p.m. at 0
- Engage the tractor P.T.O. with the engine running at idle
- Wait a few minutes
- Set the fan speed at 200 r.p.m.
DD
- After a while the oil will start dripping constantly. Refit the drain hose and tighten.
- Set engine speed at 2000 r.p.m. , the fan should rotate at max. revolutions/mn.
- Recheck oil level at tank sight glass
- Retighten hose connections and check for leaks.
- Check fan speed pressure adjustments - see section on ‘’Fan speed adjustments’’ and ‘’Fan transmission
pressure adjustment’’
FFaann ttrraannssmmiissssiioonn pprriimmiinngg
If the hydraulic pump fan has been dismantled, or pump or motor has been changed, the following priming
procedure must be carried out before starting up the transmission.