Ransomes Magna 250, Safety And Operation/Maintenance And Parts Manual

GB-15

RANSOMES SPORT 200 & MAGNA 250 CUTTING UNITS

SAFETY, OPERATORS, MAINTENANCE & PARTS MANUAL

7

MAINTENANCE & LUBRICATION

Read the Safety Instructions

Check all nuts and bolts every 75 hours

BELT DRIVE UNIT

HYDRAULIC MOTOR TO CUTTING CYLINDER
This is located in the drive housing and is accessed by
removing the drive housing complete with hydraulic
motor from cutting unit.  The cylinder drive belt should
not need any adjustment in normal use.

REMOVAL OF DRIVE HOUSING
If the drive housing should need any maintenance it is
first removed from the cylinder bearing housing by
removal of two bolts M10 x 45 together with plain
washers 10mm.  (It is important these bolts and
washers are used as any other arrangement will not give
the correct engagement of bolt in the cylinder bearing
housing).

REMOVAL OF HYDRAULIC MOTOR
To remove the hydraulic motor remove the bolts holding
the motor to the drive housing.  Carefully withdraw the
motor together with its attached toothed pulley from the
drive housing and toothed belt.

REMOVAL OF DRIVE BELT
Belt removal can now be achieved by the removal of the
larger driven toothed pulley, the pulley assembly can be
released from the drive housing by the removal of 3
screws, the belt can now be removed through the large
drive housing orifice.

BELT STORAGE AND HANDLING
For storage, the belt should be protected from moisture,
temperature extremes, direct sunlight and high ozone
environments.  The belt should be stored in its original
package, avoiding any sharp bends or crimping, which
will damage the belt.

There is no problem with leaving tension on the belt
during equipment storage.  Tension could be backed off
if desired.  Consideration should be given to extended
storage of equipment with belts installed if the
environment is detrimental as described above.

Handling of the Poly Chain GT belt is also important.
Due to the high performance characteristics of the Poly
Chain GT belt, do not twist, crimp, invert, bend or coil
the belt.  Belts should not be bent tighter than the
smallest recommended pulley diameter for that cross
section on the inside - approximately 60mm for 8mm
pitch.

Backside bending should be limited to two times the
inside permissible diameter.  Under no circumstances
should the belt be forced or prised onto a drive.

The belt may be cleaned by wiping with a rag slightly
dampened with a light, non-volatile solvent, such as
mineral spirits or paraffin.  Soaking or brushing on of
such a solvent is not advisable.  More obviously,
sanding or scraping the belt with a sharp object to
remove grease or debris is not recommended.  similar
solvent procedures should be applied to the pulleys.

FITMENT OF DRIVE BELT, HYDRAULIC MOTOR
AND DRIVE HOUSING
1. Assemble toothed belt into drive housing through
large orifice taking care not to ‘crimp’ or ‘nip’ the belt
in anyway.  The hydraulic motor complete with toothed
pulley should be assembled next taking care to make
sure the flange of the pulley is correctly assembled
through the belt, with the belt sitting squarely on the
pulley teeth.

2. Finally assemble the large pulley assembly retaining
it with the 3 screws.

3. Belt adjustment is best achieved after the drive
housing has been refitted to the cutting unit.

4. Fitting the drive housing assembly to the cylinder
bearing housing is the reverse of REMOVAL OF
DRIVE HOUSING.  Care should be taken that the
plastic drive element is correctly engaged between
driving ‘dogs’ on the cylinder drive shaft and pulley.

DRIVE BELT TENSIONING
With the hydraulic motor clamp bolts just slack enough
to allow the hydraulic motor to rotate about its pivot bolt
grasp the hydraulic motor by one hand and pull
upwards firmly to tension the belt and while held in this
position tighten the clamp bolt and finally the pivot bolt.

DIRECT DRIVE UNIT

REMOVAL OF HYDRAULIC MOTOR

To remove the hydraulic motor, remove the two screws
and washers holding the motor to the bearing housing.
Carefully withdraw the motor together with the cardan
shaft.

NOTE:

When dismantaling it is important not to

contaminate the cardan shaft or the internal splines of
the hydraulic motor and cutting cylinder shaft.  If for any
reason they should become contaminated, they should
be cleaned by degreasing and then lubricated using
Shell  Malleus  JB1 grease before reassembling.