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51
Maintenance
5. Undo the locking nut (3) and the lower screw (4) for
the belt tensioner. Remove the belt tensioner.
6. Do not unscrew the centre bolt in the drive shaft.
Remove the rear bearing bridge’s screws (5) and
the spacer washer (6).
7. Cut off the old belts.
8. Insert the new belts through the gap between the
spacer ring and the hydraulic pump and then
through the gap between the bearing bridge and
the mounting. First position one of the belts on the
pump pulley and then on the lower pulley. Repeat
the same procedure with the other belt.
9. Fit the spacer washer (6) for the bearing bridge
and the spacer ring against the pulley with the
accompanying screws (5).
10. Fit the belt tensioning screws with springs and
sleeve. Tighten the screws until the sleeve touches
the frame mounting (4). Tighten the locking nut (3).
11. Check the tension of the belts 25 hours after
changing the belts.
Adjusting the power take-off belts
Tighten the screws until the sleeve touches the frame
mounting (4). Tighten the locking nut (3).
Replacing the cutting unit belt
Replacing the belt on the Combi unit
On these cutting units with “collision-proof” blades, the
blades are driven by one V-belt. Do as follows to
replace the V-belt:
1. Dismantle the cutting unit. See “Side shifting the
cutting unit” on page 45.
2. Remove the screws for the covers. Lift off the
protective covers from over the belts.
3. Pry off the old belt from the belt pulleys. Use a pry
bar if necessary to offload the spring and release
the belt tension.
WARNING:
5
6
Belt tensioner and spacer washer
Fitting new power take-off belts
Relieving the spring
Protect your hands with gloves when working with
the blades. There is a risk of crush injuries when
working with the belt.
Belt tightening