Snapper 21500PRC - Driven Disc Service

_ ___SERVICE (Continued)__
SHARPENINQ ANGLE RLAOE
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SHARPEN blade when the cutting edges become dull if the blade is in otherwise good condition. When dull the grass
cut ends will be ragged and usually turn brown soon after mowing. For best results, remove the blade and sharp¬
en it on a grinding wheel at an angle of 22 to 28 degrees, the cutting surface should extend in about Z'h" from the
tips. Check the blade after sharpening to determine that it is still balanced. It will cause excessive vibration if un¬
balanced. EE CAREFUL TO AVOID CUTTING YOURSELF ON SHARP BLADEI
INSTALL sharpened or replacement blade with components in sequence shown in Figure 6. Make sure that the
turned-up rims in the center of the blade fit over the edges of the blade drive hub when installing. Do not substi¬
tute any components here. Tighten the blade retaining capscrew to BO-Ml foot pounds torque value.
CLUTCH LIN KAGE (Self-Prope lled)_ _ _
Make sure the vinyl cover remains over the spring(s) connecting the clutch pull rod to the clutch idler components
(see Figure 7). This not only keeps the springs clean but prevents it from rubbing against and wearing a hole in
the grass bag on mowers so equipped.
ADJUSTMENTS: If excessive pressure is required to hold the clutch lever in the engaged or drive position, the clutch
pull rod springs are probably out of adjustment. This is checked with the engine stopped and the clutch handle re¬
leased. When properly adjusted there should be 1/16" to 1/8" clearance between the inside hook of the spring and
inside eye of the push rod as shown in Figure 7. To adjust, unhook and rotate the inner and outer springs in opposite
direction, rehook and check clearance. Repeat this procedure until the clearance is correct. If the clutch handle does
not snap back to disengage the drive when the handle is released, check the clip holding the pull rod to the handle
bar for binding. Position this clip about 5" from the upper handle and rotate to best position to allow the rod to
slide without interference. Note: If the clip is placed too high, it may create excessive pressure on the push nut
holding the end of the pull rod to the clutch lever and eventually cause the push nut to pop off.
DRIVEN DISC SERVICE _
If the mower does not pull properly with the clutch engaged, check for the following: Grease on drive disc causing
slippage, broken or disconnected drive assembly spring (see Figure 10), driven disc too worn to contact the drive
disc properly, driven disc out of adjustment. This condition could also be caused by worn belts. If the belts are in
good condition and the clutch is properly adjusted, service the drive system as follows:
DRIVEN DISC ADJUSTMENT: With the engine stopped and the speed lever shifted info highest speed setting, the driven
disc should be 1/8" to 1/4" from the edge of the drive disc as illustrated in Figure 8. Readjust with engine stop¬
ped as follows: Shift the speed selector into the highest speed setting, loosen the connector hex nut and slide the
driven disc assembly inward or outward until 1/8" to 1/4" from the edge of the drive disc. Retighten connector nut
to lock as new setting.
FIGURE 7 - CLUTCH SPRING LOCATION AND ADJUSTMENT DETAIL
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