Countax B MK4 Series Operator's Manual page 32

Cutter Deck Installation (Deck Levelling)
Levelling Front to Back
The following instructions assume the deck is already
installed. Please install the deck as directed before
attempting to level.
The cutter deck should be set so that it is parallel
to the surface it is cutting with a maximum variation
from side to side or front to back of 3 mm.
Setting the Scalp Wheels
Before levelling the deck set the anti-scalp wheels.
For best results, set the anti-scalp wheels in the
middle adjustment hole position. If the closest deck
cut is too short, set the wheels to the lowest position.
Grass scalping can also be minimised by setting the
wheels in the lowest adjustment holes.
Levelling the deck
Check tyre pressure is correct before levelling deck
then follow this sequence:
1. You need two people to level the deck – one
to lift the deck while the other removes or
relocates the adjuster trunnion.
2. Ensure that the Anti-Scalp Wheels are all set to
the same height.
3. Lower the Cutter Deck to a position one above
the lowest setting – check levels with a ruler or
tape.
4. Now locate the Front to Back Adjustment Rod
and trunnion under the chassis near the right
rear wheel (fig. 55). Both the trunnion and the
Rod are threaded. Adjust the trunnion position
to alter the deck level.
5. To free the trunnion, use a 17 mm spanner or
socket to remove the M10 nyloc linkage nut
and washer. Then push the trunnion free.
6. Rotate the trunnion further along the rod to
raise the rear of the deck. Rotate it in the
opposite direction towards the thread end to
lift the front.
Adjustment is rapid, so try one or two turns first
before relocating and securing the trunnion. Check
the effect, then repeat adjustment if needed.
(fig. 54)
(fig. 55)
Threaded Rod
Section
Linkage Nut
Page 32
Highest Anti Scalp
Wheel Position
Lowest Anti Scalp
Wheel Position
fig. 54
Front to Back
Adjustment Rod
Trunnion
Deck Hanger Bracket
fig. 55