Scag Power Equipment MAG User Manual

Page 23

Figure 6-2 Throttle Control Adjustment

6.4 CUTTER BRAKE LINKAGE

The cutter brake linkage is self-adjusting. If the brake will

not hold the cutter blades from turning, consult your Scag

dealer. Do not operate the mower if the cutter brake is not

functioning properly.

6.5 FAN BELT ADJUSTMENT

1. Remove the pump belt guard to gain access to the fan

drive idler bracket.

2. Loosen the two bolts (A and B, Figure 6-3). Using a

3/8 inch ratchet wrench installed in hole C, rotate the

bracket until 1/2 inch deflection in the belt is observed

using 10 pounds of pressure on the belt. See Engine

Drive Belts, section 7.9 for checking method.

-NOTE-

If you turn the nut too much, you will com-

press the spring, making too much end play.

Go to step 4.

4. If the drive wheels rotate in rearward travel direction,

turn the adjustment bolt (Figure 6-1) clockwise until

rotation stops. If the drive wheels rotate in the for-

ward travel direction, turn the adjusting bolt counter-

clockwise until rotation stops.

5. Check the adjustment of the right foot pedal for full

forward speed. The bottom of the foot pedal should be

1/4 inch from the top of the foot plate (See Figure 6-1)

when the pump is stroked in the full forward position.

To make an adjustment, loosen the jam nut at the

pump control bellcrank (Figure 6-1). Depress the foot

pedal and turn the control rod until 1/4 inch is obtained

between the bottom of the foot pedal and the top of the

foot plate. Tighten the jam nut.

6. Start the engine. The drive wheels should rotate only

when the forward/reverse foot pedal is depressed.

6.3 THROTTLE CONTROL LINKAGE
ADJUSTMENT

Should the throttle control lever not stay in

position after moving it to increase or decrease the

engine speed, the throttle linkage must be

tightened. Hold the lock nut (Figure 6-2) with a wrench

while turning the bolt clockwise to tighten the throttle lever

against the friction plate. Do not overtighten as the control

lever will be hard to move.

If the engine speed must be increased or decreased, consult

your Scag dealer.

Locknut

Bolt

Figure 6-3 Fan Belt Adjustment

Section 6