Drive Chain Tensioning - MAGNATRAC MH7000 Operator / Technical Manual

DRIVE CHAIN TENSIONING

(#536 & 1090 Chains)
Tighten #536 Drive Chain (#50 roller chain) by
increasing the center distance between the
movable #223 shaft and the fixed #436 shaft...
make this adjustment to both sides of Crawler!
µ
Consult the part photos and drawings at
the back of tractor manual to assist in
this procedure.
To tighten chain, first remove #1159 Pan
(remember to remove electrical plug from #441
Seat Switch). Next, loosen the two 3/8" Cap Screws
holding the #249 Support to the frame...fully loosen,
but do not remove Cap Screws.
Then loosen the six bolts (three on the
outside and three on the inside) on the #202
Case and rotate it upward (away from the frame
box) until the slack has been removed from the
Chain.
Do not make it "bow-string" tight. Secure in
position by retightening the six Bolts loosened
above. Make this #536 Drive Chain adjustment
on both sides of Crawler! Now, retighten the two
3/8" Cap Screws holding the #249 Support to the
frame.
Replace #1159 Pan, electrical plug on Seat
Switch and then start and operate Crawler. Check
Drive Chain adjustment and readjust if necessary.
Tighten #1090 Drive Chain (#80 roller chain) by
increasing the center distance between the
movable #214 Rear Axle and the fixed #436
Shaft...do this to both sides of Crawler.
µ
Consult the part photos and drawings at
the back of tractor manual to assist in
this procedure.
Block Crawler from beneath so that Tracks
are a few inches above the ground. Loosen and
remove the two 1/2" Nuts on the ends of each
#1030 Rod. Remove the #233 & 234 Springs and
allow the #215 Front Axle to slide back to the end
of its slot in the Track Frame.
Remove the three Cap Screws holding the
#1212R & #1212L Right & Left Guards mounted
to the underside of the undercarriage...save bolts
for later reassembly!
Thoroughly clean the #1212R & #1212L
Guards and the interior compartments and roller
chains they cover!
Loosen the two 1/2" Cap Screws and fully
remove the #251 Cotter Pin holding each #1211
Axle Support...fully loosen Cap Screws so that the
#214 Rear Axle
(horizontally), but do not remove Nuts from 1/2"
Cap Screws
Add additional #232 Shims to the existing
pack of #232 Shims mounted above each #1211
Axle Support on each end of #214 Rear Axle. Add
will drop down evenly