Cylinder To Bottom Blade Adjustment; Concave - Ransomes Mastiff 91 Safety, Operation & Maintenance Manual

7.3

CYLINDER TO BOTTOM BLADE ADJUSTMENT_____________________________

To check that the cutting cylinder is set correctly to the bottom
blade: tilt the machine back, hold a thin piece of paper
between the edge of the blade and spiral cutters, and turn the
cylinder manually. Wear gloves and keep hands clear of the
blade
The paper should be cut cleanly along the length of the
bottom blade; if not, some adjustment is necessary, DO NOT
OVERTIGHTEN.
Adjustment is made by turning the adjustment screws
clockwise to move the cylinder towards the blade.
It is recommended that an 1/8 of turn is made alternatively to
each screw, checking frequently with the paper until the
correct setting is achieved.
7.4

CONCAVE____________________________________________________________

If the grass clippings do not enter the grassbox satisfactorily,
the concave needs adjusting:
1. Release the two setscrews as indicated at each
side, which secure the concave to the side frame.
2. Move the concave until there is approximately
1.5mm (1/16in) between the concave and cutting
cylinder, measured as near to the centre line of the
cylinder as possible.
3. Ensure that the concave aligns correctly with the
bottom edge of the bottom block before retightening
the setscrew.
NOTE
The concave must not touch the cutting
cylinder.
ADJUSTMENTS 7
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