Winget 200TM, Workshop Manual

Page: 38 / 149

WORKSHOP MANUAL
Winget Mechanically Fed Mixers
Models: 200TM
From 1998
Unbolt the jib top beam from both jib legs, unbolt and remove both jib legs refit all
setscrews and bolts back into the jib legs and top beam to prevent loss.
Feed Apron
Two Compartment Feed Aprons are designed to assist the flow of materials into the
hopper in conjunction with a dragline shovel.
The feed apron consists of L/H and R/H side panels, base panel, centre divider,
support bar, rubber flap, (to prevent materials falling between the hopper and apron)
and rubber flap retaining bar.
To assemble the feed apron, place the base smooth side up in front of the hopper,
lay the rubber flap on the base and secure with the retainer and countersunk screws.
Using a suitable support raise the base so that rubber is approximately 470
millimetres (18”) off the ground and the base slopes back at an angle, both bolt the
side panels in place. Remove the support so the weight of the base is taken by the
side panels. Fit the support bar between the side panels and bolt the centre divider
in place.
Hydraulic System Description – Basic
The basic hydraulic system is simple in design consisting of an engine or electric
motor driven hydraulic pump, hydraulic tank containing the suction strainer, a single
spool control valve and a single acting hydraulic cylinder onto which is mounted the
hose burst valve. The hose burst valves are only fitted to those machines intended
for use within the European Community or the USA. Early single acting rams have a
cylinder with an open to atmosphere breather, later rams have the breather piped
directly back to the hydraulic tank.
The pump draws oil from the tank through the suction strainer and delivers the oil to
the control valve, if the valve control lever is in the neutral position the oil is directed
back to the tank through the return port.
If the lever is raised oil is directed to the hydraulic cylinder which raises the hopper,
the maximum pressure being dictated by the adjustable relief valve contained within
the control valve.
If the lever is lowered the weight of the hopper displaces oil out of the cylinder back
through the valve out through the return port to the tank.
If the lever is returned to the neutral position during the lowering cycle the return port
is closed and oil is trapped between the cylinder and spool preventing the hopper
from dropping.