Walker PA6685 - Manual (Page 16)

Maintenance Instructions
14
ADJUSTMENTS
Drive Chain Tension
The drive chain should have 1/4 to 1/2 in. (6 to 13 mm)
of slack at midspan. Remove the chain guard cover
to check slack. Adjust the drive chain as follows:
1. Remove the three (3) bolts fastening the remov-
able chain guard cover to the frame.
2. Loosen the chain tension block mounting nut
and bolt (see photo below).
3. Position the chain tension block so the chain
has 1/4 to 1/2 in. (6 to 13 mm) of slack.
4. Retighten the chain tension block mounting nut
and bolt.
5. Recheck the drive chain tension.
Drive Chain Adjustment
Proper Drive Chain Tension
Tine Ends
Tine ends are adjustable by using the following pro-
cedure:
1. Loosen the retaining nut on the tine thread and
unscrew tine end to achieve the desired depth.
Open side of tine should be to rear.
IMPORTANT: Do not unscrew the tine ends too
far. The maximum aerating depth is 2-1/2 in.
(6.35 cm).
2. Tighten retaining nut.
Tine End Depth Adjustment
WARNING
DO NOT attempt to make any adjustments
with the tractor engine running. Disen-
gage the PTO clutch, shut off the machine,
and remove the ignition key. Wait for all
movement to stop before getting off the
seat.
Tension
Block Nut
Ref. Chain
Guard
1/4 to 1/2 in.
(6 to 13 mm)
Slack at
Midspan
Chain Idler
Tine
Opening
to Face
Rear of
Unit
Retaining
Nut
Tine
Opening