Trouble Shooting Guide; Sickle Knife Drive Belt Adjustment; Cutter Bar Break Away Adjustment - Simplicity 707 Owner's Manual

TROUBLE SHOOTING GUIDE
PROBLEM OR SYMPTOM POSSIBLE CAUSES
CHECKS AND CORRECTIONS
Mower cuts unevenly.
Cutter bar not lowered completely.
Place tractor hydraulic lift lever in FLOAT
position.
Skid shoes not adjusted for same
height.
Adjust skid shoes. See page 6.
Rough looking cut - or grass
being pulled out by roots.
Engine speed too slow.
Ground speed too fast.
Increase engine speed.
Reduce ground speed.
Knife edges dull.
Replace sickle knives.
Cutter bar does not raise high
enough (45°) using tractor
hydraulic lift.
Right lift cable not in correct
lift bracket hole.
Adjust lift cable. See page 3, Item 9.
Cutter bar breaks back too
easily.
Ground speed too fast.
Break-back latch not correctly
adjusted.
Reduce ground speed.
Adjust break-back latch. See page 8.
Cutter bar does not break¬
back when solid object is hit.
Break-back latch not lubricated.
See Figure 8, Item F.
Lubricate latch.
Break-back latch not properly
adjusted.
Adjust break-back latch. See page 8.
Sickle knife noisy or vibrates
excessively.
Sickle knife wear plates badly
worn.
Replace wear plates.
Sickle knife clips badly worn.
Replace clips.
Tractor handles poorly.
Tires not properly inflated.
Inflate tires according to tractor
owners manual.
Traveling too fast on rough or
sloping ground.
Reduce speed.
Not using recommended weights.
Use rear wheel weights.
ward will move the left side of the belt closer to the length of spring (A) to see that it is correct. If it is not 3" to
battery and farther from the frame, but will move the 3-1/4" in length repeat steps 1 and 2.
right side of the belt away from the battery and closer
to the frame.
CUTTER BAR BREAK AWAY ADJUSTMENT
d. See figure 1. Tighten capscrew (D) securely to prevent See figure 20. The cutter bar is hinged on the mower frame,
idler pulley (E) from moving out of adjustment. Cap- so it can swing to the rear if a solid object is struck while
screw (D) should be torqued to 50 foot pounds. mowing. The amount of force on the cutter bar required to
e. Repeat steps 1 through 4 to readjust the belt tension. operate the brake away mechanism is controlled by the
length of spring (D). A good starting adjustment for spring
SICKLE KN1FE DRIVE BELT ADJUSTMENT
(D) is 5" to 5-1/4". If the cutter bar breaks away too easily,
See figure 20. Tension on the sickle knife drive belt is checked such as when mowing but no solid object is struck, or does
by measuring the length of spring (A). With the drive belt not break away easily enough, adjustment can be made as
installed the spring should be 3" to 3-1/4" long. If the spring follows:
length is not within this range readjust it as follows:
1
. See figure 8. Coat the latch assembly (F) with a film of
1. See figure 20. Loosen the set screw in collar (B) slightly grease so it is free to slide.
CAUTION: THE LATCH AS-
so that the set collar can be moved on rod
(C). SEMBLY MUST BE KEPT COATED WITH GREASE SO
2. Push rod (C) to the right and set collar (B) to the left to
THAT IT IS FREE TO OPERATE FOR THE CUTTER
compress spring (A). When spring (A) is compressed to 3",
BAR BREAK AWAY MECHANISM TO OPERATE EF-
j
tighten the set screw in collar (B) to hold it in place.
FECTIVELY.
3. After tightening the set screw in collar (B) check the 2.
See figure
20. To adjust the break away mechanism so the
8