Hyd-Mech S-20H, Operations & Maintenance Manua

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Pg 17
S22Hna 2002a
BLADE CHANGING PROCEDURE,
CONTINUED
9A. As the blade tracking will stay fairly constant, it should be checked occasionally as shown on the drive
wheel tracking photo below. The blade teeth should protrude from .185" to .200" from the face of the blade
wheels. If the tracking requires adjustment, follow the instructions below.
BLADE TRACKING ADJUSTMENT
10. First, inspect the blade wheels for wear or damage and repair as
required. Blade tracking adjustment should always begin at the wheel
where the tracking is farthest out of specification. Using the
instructions below, adjust the worst wheel, jog the blade and recheck
both wheels. Repeat this process until both wheels are within
specification.
10A. Idler Wheel Adjustment
On the blade tensioner slide assembly, there are three 9/16" hex head
bolts. Loosen the two bolts at the left end by 1/4 turn. Loosen the
single bolt at the right side of the slide assembly by 1/2 turn. In the two
holes above and below this bolt are two 3/16" allen key set screws.
Turn both set screws 1/4 turn and tighten the hex bolt at the right, then
the two bolts at the left. Turning the set screws clockwise will pull the
blade on to the wheel, and turning counter clockwise will push the
blade off the wheel. Each 1/4 turn will move the blade approximately
.5mm. There is also a single set screw at the left end of the slider.
Turning it clockwise will push the blade off the wheel.
10B. Drive Wheel Adjustment
On the wall behind the drive wheel are two adjusting bolt assemblies and two hex bolts.
Loosen all four of them with a 3/4" socket and turn the larger hex head bolts 1/4 turn with
a 1 1/8" socket and extension and then tighten the two bolts in the assemblies, then
tighten the two hex bolts et the left. Turning the 1 1/8" bolts clockwise will pull the blade
on to the wheel and turning counter clockwise will push the blade off. Each 1/4 turn will
move the blade approximately .5mm".
11. Check the blade brush adjustment (next page)to be sure the blade is being cleaned
properly.
Checking the blade tracking with
a calliper.
Drive wheel
tracking bolt
assemblies.
Idler wheel tracking set screws &
hex bolts found on the slide
assembly.