Countax D50 - Manual (Page 12)

Page 12
Cutter - Drive Belt
Before carrying out tests or adjustments (the problem may be
simpler) – first CHECK the following points:
1. Is the engine to cutter drive belt slipping? Check that the drive
belt tension lever (fig 1) under the left running board is in the
rear (tensioned) position. If not, rectify – this is the most likely
cause.
2. Has debris collected in the cutter deck pulley housing
(page 9)? If so remove the cover and remove the obstruction.
ENGINE TO CUTTER DRIVE BELT TENSION
The correct tension of the cutter drive belt (engine to deck) is
critical. If incorrectly set it can lead to engine damage.
To check the tension, follow this procedure:
1. Put the deck in a middle cutting height (position 5 on the HE
illuminated indicator).
2. Select a midway position on the belt between the front
(electric clutch) pulley and the rear (cutter deck) pulley and
using a spring balance; apply a 2Kg (4 to 5lbs) pull (fig 3).
3. Using a ruler or tape, measure the deflection achieved which
must be 13mm (1/2"). If more, the belt tension must be
increased, if less – decreased.
To correct the tension, follow this procedure:
1. Release the tension on the belt by pulling the belt tension lever
forward (see fig 1).
2. Taking care not to burn yourself on the hot exhaust, locate the
Trunnion at the end of the belt tension rod – lift the bonnet and
look at the front (nearside) close to the exhaust.
3. Remove the spring clip and washer holding the Trunnion in
place on the deck tension cradle (fig 2) and release the
Trunnion so it can be turned.
4. Both the Trunnion and the belt tension rod are threaded. You
increase belt tension by winding the Trunnion towards the end
of the rod and reduce tension by winding in the reverse
direction.
5. Having made the adjustment re-locate and secure the
Trunnion, re-tension the belt with the belt tension lever – then
re-check the belt tension.
Deck Tension
Cradle
Deck Tension
Rod
Trunnion
Washer
Spring Clip
Kg
cm
Specified Belts and Blades
Part No. Part:
Engine/Deck Belt -
Dayco Super II B56 (Mulcher)
22871200
Deck Internal Drive (Mulcher)
BB112
228000900
Deck Internal Drive (IBS)
BB155
22950200
Mulcher Blades x3 16938100
IBS RH Blade 169381300
IBS LH Blade 169381400
PGC Drive Belt A47 22898000
PTO Drive Belt - Dayco II A98 22950100
Transmission Drive Belts A98
Dayco Super II
2295000
Engine/Deck Belt -
Dayco Super II B57 (IBS)
22940100
-WARNING-
On no account must
the tractor be run with
the engine to cutter
drive belt over-
tensioned as it will
damage the engine.
As any such damage
will not be covered by
your warranty you
may prefer that your
dealer sets the
tension.
fig 2
fig 3
fig 1
De-tensioned
Position
Actuator Tensioned
Position
Deck
Tension Lever
Deck
Tension Cradle