Troy-Bilt E686N Bolo Tine Maintenance, Checking Tines for Wear, Adjusting Reverse Drive, Worn New

Section 5: Maintenance

WARNING

Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to come to a complete stop, disconnect spark plug wire and move wire away from spark plug. Remove ignition key, if so equipped.

Failure to follow these instructions can result in serious personal injury or property damage.

Adjusting Reverse Drive:

1.Place Wheels/Tines/PTO Drive Lever in FORWARD position.

2.On left side of tiller, put a 1/2" wrench on the plunger retaining bolt and another 1/2" wrench on the jam nut next to it (Figure 5-27). While holding the bolt steady, loosen the jam nut (counterclock- wise) until it touches the bolt head.

Jam Nut

Retaining Bolt

Figure 5-27: Hold bolt steady while loosening or tightening jam nut.

3. Turn the bolt in until it tightens against

the plunger inside the spring. The bolt

must be tight to prevent plunger from

turning – but be careful not to overtighten

and break the bolt.

4. Place a 7/8" wrench on the head of the

reverse adjustment bolt and a 9/16"

wrench on the jam nut below it (Figure 5-

28). Hold the bolt steady while loosening

the jam nut three or four turns.

5. Move the Wheels/Tines/PTO Drive

Lever to NEUTRAL. The switch body on

the bottom of the engine mount tab

(Figure 5-24) should be resting squarely

on top of the reverse adjustment bolt, and

the reverse disc should be at least 3/16"

away from the transmission drive pulley.

If the reverse disc is any closer than this,

raise the reverse adjustment bolt (turn it

counterclockwise).

6. Check that reverse disc is at least 3/16"

away from transmission drive pulley.

Then hold reverse adjustment bolt steady

with one wrench while tightening jam nut

with a second wrench (Figure 5-28).

7.Place a chalk or pencil mark on the top edge of the plunger retaining bolt. Now, while watching the mark, loosen the bolt 3/4-turn (Figure 5-29). Do not exceed a 3/4 turn (this would disengage the bolt from the locking groove in the side of the plunger).

Adjustment

Bolt

Jam Nut

Figure 5-28: Loosen jam nut before turning reverse adjustment bolt.

8.Hold the plunger retaining bolt steady with a wrench while tightening the jam nut against the side of the plunger housing (Figure 5-27).

Figure 5-29: Loosen plunger retaining bolt about 3/4-turn, then tighten jam nut against plunger housing.

9.Check the action of the reverse disc as explained previously.

IMPORTANT: If the above adjustments have not corrected an improperly working reverse drive, contact an authorized dealer or Factory Technical Service Department for assistance.

Bolo Tine Maintenance

Checking Tines for Wear

Inspect the tines for wear or damage after every 30 operating hours. The rate of wear depends upon hours of use and soil conditions. With use, the tines get shorter, narrower and more pointed (Figure 5-30). If badly worn, they lose the ability to till deeply.

Worn New

Figure 5-30: Check for wear every 30 operating hours.

Worn tines leave an ever-increasing gap in the middle of a tilled row. The normal gap is 3" between the tine tips – replace the tines when the gap widens to 5"

(Figure 5-31).

1 2 3 4 5 6 7 8

Figure 5-31: Replace tines when gap between inner tines is 5" or more (normal gap is 3").

Tines can be replaced individually or as a complete set. See replacement instruc- tions that follow.

37