How To Tension The Conveyor Belt; How To Adjust The Conveyor Drive Chain - Toro MH-400 Operator's Manual

How to Tension the Conveyor Belt

1. Park the MH-400 on level ground with the rear gate
and feed gate at least 6.25 mm (¼ in) off the floor
(depending on the material).
2. Fully load the machine with sand that you expect the
MH-400 to use.
3. Remove the yellow front covers on either side of the
MH-400.
4. Using two wrenches, hold the end of the tensioner
rod stationary, while loosening the locking nut
closest to the end of the rod.
5. Move the locking nut back 2–5 cm (1–2 in).
: Use extreme caution around
W
ARNING
moving parts with safety guards removed.
6. Turn on the conveyor belt.
7. If belt slips, tighten the tension bolts evenly (with
machine off) half a turn and recheck. Continue until
the belt moves without any slippage.
8. Give both tensioning bolts another half turn. At this
point you should have proper tension.
9. To verify, look underneath at the chassis cross
member. The middle of the belt should just clear the
chassis cross member when the MH-400 is in the
down position. If the middle of the belt is touching
the cross member, tighten both tensioning bolts
another quarter of a turn.
: Be patient! Do not over-tension the belt.
I
MPORTANT
: Do not use air tools on the belt
I
MPORTANT
tensioning bolts.
Check and adjust the belt tension frequently. All rubber
conveyor belts will stretch, especially when they are new
or have not been used for awhile.
Maintenance Instructions

How to Adjust the Conveyor Drive Chain

If the conveyor drive chain is loose, it needs to be
tightened (Figure 32).
1. Turn off the tow vehicle and set the parking brake.
2. Remove the rear conveyor drive guard.
3. Loosen the bolt that goes through the tensioner
sprocket.
4. Tighten the positive locking screw using moderate
force.
5. Tighten the tensioner sprocket bolt.
6. Check that the chain is sufficiently lubricated and the
sprockets are secure to the shafts.
7. Replace the rear conveyor drive guard.
: Do not over-tension the chain.
C
AUTION
Leave just enough tension to take up the
extra slack.
Figure 32: Tension the conveyor drive chain
(side view)
A. Positive locking screw
B. Tensioner sprocket—push down to tighten, do not
over-tension
C. Sprocket bolt
D. Slack side, about 6.25 mm (¼ in) movement
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