Cub Cadet 421R Manuel D’Utilisation

9

NEVER attempt to make any

adjustments while the engine is running, except
where specified in the operator’s manual.

•

To check the adjustment of the shave plate, place 
the unit on a level surface. See  Figure 12. The 
wheels, shave plate and augers should all contact 
level surface. Note that if the shave plate is 
adjusted too high, snow may blow under the 
housing. If the shave plate wears out excessively, 
or the unit will not self-propel, the shave plate may 
be adjusted too low.

NOTE:  On new units or units with a new shave plate
installed, the augers may be slightly off the ground.

•

To adjust, tip the snow thrower back so that it rests 
on the handle. Loosen the lock nuts and bolts which 
secure the shave plate to the housing. See Figure 
13. Move the shave plate to desired position and 
retighten the nuts and bolts. Make certain all nuts 
and bolts are tightened securely.

Periodic adjustment of the belt tension may be required 
due to normal stretch and wear on the belt. If augers 
hesitate while turning although engine maintains  same 
speed, adjust tension following instructions below.

•

The upper hole in the control handle provides 
adjustment for belt tension. To adjust, disconnect 
the “Z” end of control cable from the bottom hole in 
the control handle. See Figure 14 . Hook the cable 
into the upper hole in control handle as shown here. 

If additional adjustment is required, follow steps below.  

•

Remove the belt cover by removing five hex screws 
that hold it in place. See Figure 16.

•

There are three adjustment holes provided in the 
idler bracket assembly. See Figure 15. To adjust, 
move the extension spring on the end of the clutch 
cable to the next higher adjustment position on the 
idler bracket assembly. Reassemble belt cover. 

If any adjustments need to be

made to the engine while the engine is running
(e.g. carburetor), keep clear of all moving
parts. Be careful of muffler, engine and other
surrounding heated surfaces.

•

Refer to the separate engine manual, packed with 
your unit, for carburetor adjustment information.