Ferris Industries 5900647, 5900645, 5900636, 5900646, 5900638 Troubleshooting, Adjustment & Repair

Troubleshooting, Adjustment & Repair

4.Slide the drive belt over the edge of the stationary idler pulley (B). Carefully release the tension on the breaker bar until the idler arm comes to a stop.

6.Unhook the idler tension spring (C) from the anchor bolt (D). Remove the old belt and replace with a new one. Make sure the V-side of the belt runs in the pulley grooves.

7.Install the drive belt on the PTO pulley, the spindle pulleys, and all idler pulleys except the stationary pulley. Rehook the idler tension spring from the anchor bolt. Carefully rotate the breaker bar COUNTER-CLOCKWISE and install the belt on the stationary idler pulley. Carefully release the tension on the breaker bar. The belt should be routed exactly as shown in Figure 28.

8.Reinstall the mower deck guard.

9.Run the mower under no-load condition for about 5 minutes to break-in the new belt.

Check / Adjust the Mower Belt Idler Tensioner Spring Length

52” & 61” Models - S/N: 2015782584 & Below: feature a stationary mower belt idler tensioner and cannot be adjusted.

48” Models - All; 52” & 61” Models - 2015782585

&Above: feature an adjustable mower belt idler tensioner which must be to checked to make sure the mower deck belt is set to the correct tension.

1.Position the mower deck at its middle cutting position.

2.Use the Mower Belt Idler Tensioner Spring Length chart to determine the correct spring length

Mower Belt Idler Tensioner Spring Length

48”	Mower Decks	5-3/4” (14.6 cm)
52”	& 61” Mower Decks	6-1/2” (16.5 cm)

2.Measure the coil length of the mower belt tensioner spring (A, Figure 29). The measurement should equal the measurement as indicated in the chart. If it does not, adjustment is necessary, continue with step # 3.

3.Loosen the jam nut (C).

4.Turn the adjustment nut (D) until the measurement as indicated in the chart is achieved.

5.Retighten the jam nut.

B	D
C
A	A
	C
	A

Figure 28. Mower PTO Belt Routing

A.Spindle Pulley

B.PTO Drive Belt

C.Stationary Idler Pulley

D.Spring-loaded Idler Pulley

B	A
	C
	D

Figure 29. Check / Adjust the Mower Belt Idler Tensioner Spring Length

A.Mower Belt Tensioner Spring

B.Measurement

C.Jam Nut

D.Adjustment Bolt

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