Walker IMPLEMENT HITCH SB6670 - Manual (Page 64)

64
Maintenance Instructions
ADJUSTMENTS
Rotary Broom 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. Loosen the chain idler nut.
Loosen Chain Idler Nut
2. Position the chain idler so the chain has 1/4 to
1/2 in. (6 to 13 mm) of slack.
3. Retighten the chain idler nut.
4. Recheck the drive chain tension.
Proper Drive Chain Tension
Two-Stage Snowblower Skid Shoes
Adjust the skid shoes to allow the required clear-
ance under the blade. On level, paved surfaces,
adjust the skid shoes to allow 3/16 to 1/4 in. (5 to
6 mm) clearance between the cutting edge and the
surface. On uneven or gravel surfaces, allow 1/2
to 5/8 in. (13 to 16 mm) clearance, depending on the
size of the gravel. Refer to Skid Shoe Height Ad-
justment illustration.
Skid Shoe Height Adjustment
Two-Stage Snowblower Reduction Chain
Tension
Adjust the tension on the reduction chain as follows:
1. Loosen the four (4) bolts securing the lower
sprocket support box to the reduction box hous-
ing.
2. Position the lower sprocket support box accord-
ing to the amount of chain tension required.
The chain should have about 1/4 to 1/2 in. (6 to
13 mm) of slack.
3. To increase the chain tension, position the
support box lower. To decrease the chain ten-
sion, position the support box higher.
4. Retighten the four (4) bolts securing the support
box.
Chain Idler
Nut
Chain Idler
Drive
Chain
Chain Idler Bolt
Chain
Guard
1/4 to 1/2 in. (6 to 13 mm)
Slack at Midspan
Chain Idler
3/16 to 1/4 in. (5 to 6 mm)
Clearance for Level, Paved Surfaces
1/2 to 5/8 in. (13 to 16 mm)
Clearance for Uneven or Gravel Surfaces