Section 4 - REPAIR & ADJUSTMENTS
WARNING
DO NOT attempt any maintenance, adjustments or service with engine and blade running. STOP engine and blade. Disconnect spark plug wire and secure away from spark plug. Engine and components are HOT. Avoid serious burns, allow sufficient time for all components to cool.
4.3GROUND SPEED CONTROL ADJUSTMENT 4.3.1. IDLER SPRING TENSION ADJUSTMENT Correct idler spring tension assures that mower will achieve fastest attainable speed when ground speed control lover is placed in ‘FAST’ position.
1. Remove rear cover from mower. Refer to Section “Rear Cover Removal & Installation”.
2. Idler spring tension is adjusted properly when:
a. With lever in ‘SLOW’ position (see Figure 4.4), belt is relaxed, and idler spring on end of ground speed control cable has no extension. See Figure 4.6.
GROUND SPEED
LEVER IN ‘SLOW’
POSITION
SPRING HAS NO
TENSION
INNER NUT
OUTER NUT | BELT IS RELAXED |
FIGURE 4.6
b. With lever in ‘FAST’ position (see Figure 4.4), belt is tight, and idler spring on end of ground speed control cable is extended approx. 1”. See Figure 4.7.
GROUND SPEED | UNEXTENDED | |
LEVER IN ‘FAST’ | ||
LENGTH | ||
POSITION | ||
1” | ||
|
SPRING LENGTH | BELT IS TIGHT |
EXTENDED 1” |
|
FIGURE 4.7
To adjust idler spring tension:
Loosen outer nut on end of ground speed cable, and run inner nut in toward cable (clockwise) or out from cable (counterclockwise) by 1/2 turn increments until correct adjustments are attained. See Figure 4.6. Be sure to tighten outer nut.
3.Replace rear cover.
4.3.2.MINIMUM GROUND SPEED ADJUSTMENT If mower is traveling too fast or too slow when ground speed control lever is placed in ‘SLOW’ position, minimum ground speed can be adjusted. NOTE: Before adjusting minimum ground speed, be sure idler spring tension is adjusted correctly, as idler spring tension may affect minimum ground speed. Refer to Section “Idler Spring Tension Adjustment”.
1. Remove rear cover from mower. Refer to Section “Rear Cover Removal & Installation”.
2. Place ground speed control lever in ‘SLOW’ position. See Figure 4.4.
3. Adjust minimum ground speed:
To decrease minimum ground speed:
Remove end of idler spring from current adjustment hole, and relocate spring one hole closer to idler arm pivot bolt. See Figure 4.7a.
To increase minimum ground speed:
Remove end of idler spring from current adjustment hole, and relocate spring one hole farther from idler arm pivot bolt. See Figure 4.7a.
ADJUSTMENT
HOLES
INCREASE MINIMUM
GROUND SPEED
DECREASE MINIMUM GROUND SPEED
IDLER PIVOT BOLT
FIGURE 4.7a
NOTE: After adjusting minimum ground speed, readjustment of idler spring tension may be necessary.
4.Replace rear cover.
5.Check minimum ground speed; repeat adjustment as necessary.
THE DRIVE BELT ON THIS UNIT IS SUBJECT TO WEAR, AND SHOULD BE CHECKED REGULARLY. REPLACE A WORN, FRAYED OR DAMAGED BELT IMMEDIATELY.
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