What is proper procedure for replacing all 3 pulley/ blade drive assemblies. Had trouble getting blade mount plate off of bottom off spindle shaft.

That pully has several washer with it. If they aren't there or out of place then the idler tensioner will run at an angle. Get the parts breakdown for it and check it to make sure all your parts are still there.

On most you cant. Some are pressed in so on those you need a press to get them out. Usually the spindle assembly is not that much more than just the spindle...and since it's assembled you don't need to worry about bearings and grease either.

By loose blade I assume you mean that it can be moved up and down at the tip of the blade. It is most unlikely that the central nut has come loose, but check anyway. If this nut is tight and the shaft is loose in the bearing this means the bearing has worn out. Remove the deck from the machine. Photograph the run of the belt as this has to be removed. Also the direction of the grease nipple. Remove pulley from loose spindle. Turn deck on its edge or mount on two saw horses or similar so you can get to top and bottom of spindle bolts. Remove cutting blade. Remove spindle housing and clean area so no rubbish gets caught when reassembling. Otherwise spindle may be set different and mower will leave a line of differing cut. Take spindle to vise and remove any retaining nuts or circlips from shaft and clean as clean as new. Apply light oil or CRC etc to help move bearing along shaft. Open vise wider that outside of bearing, usually 44 to 50mm [1 3/4" to 2"] and refit nut on thread. Check nut is always spaced free of top bearing. With cushion of hardwood or nylon tap the shaft to move it down with lower bearing coming out of spindle housing. To remove top bearing from housing, turn housing up other way and use a wooden shaft such as a broom handle to tap bearing free of housing. Clean out grease and replace when reassembling. Do not reuse other bearing. They are cheap and likely to fail shortly anyway. These bearings usually have no seals on inside.

Typical Kubota mower spindles are mounted with 4 bolts. Some have 4 more on a larger support plate. First the belt pulley must be removed, possibly with the help of a jaw-type puller. Then remove the 4 bolts around the perimeter of the spindle. Using a soft mallet or wood block, drive the spindle assembly down through the deck, making sure there is room underneath for it to fall. Kubota sells replacements as complete assemblies which saves a lot of time vs. rebuilding the spindle.

Check the following:


1. DC motor assembly.
Make sure all the motor plate mounting screws are tight.


2. Idler pulley - DC motor assembly.
Make sure the idler pulley is not binding on the pulley shaft. Check the pulley for wear. Check the idler pulley shaft on the motor mounting plate for damage or contamination.


3. Drive pulley.
Check the drive pulley for wear, binds or damage to the pulley or pulley shaft. Make sure the pulley turns freely on the pulley shaft.


4. Motor drive belt - tray drive belt.
Check the DC motor drive belt for damage. Make sure the belt is tracking correctly on the drive pulley, idler pulley, and motor pulley. Check the tray drive belt for damage. Make sure the belt is tracking correctly on

Replacing the Drive Belt
IMPORTANT: To aid in reassembly, note the orientation
of the drive belt on the two idler pulleys and the engine
flywheel pulley prior to performing the following steps.
Refer to Figure 10.
The edger drive belt is subject to wear and should be
replaced if any signs of cracking, shredding or rotting
are present. To replace the belt, proceed as follows:
1. Working in front of the edger, loosen the flange
lock nut on top of frame, allowing the idler pulley
assembly to pivot slightly out from the frame. See
Figure 10.
2. With your other hand, carefully reach under the
rear of the unit and remove the belt from around the
engine flywheel pulley.
3. Remove the spindle sheaves belt guard by removing
the two self-tapping screws which secure it to the
blade plate assembly. See Figure 10.
4. Carefully remove the belt from the pulleys,
again making sure to note the orientation of the belt.
Discard the belt.
Install the replacement belt (Part No. 754-04032B) in the
same configuration that the original belt was routed as
follows:5. Working from the front of the edger, place the belt onto
the spindle sheaves, route it back onto the two idler
pulleys, and then place it onto the engine flywheel
pulley.
IMPORTANT: Make certain that the "V" side of the belt
is seated into the top pulley and the flat side of the belt is
seated into the bottom pulley.
6. Reinstall the spindle sheaves belt guard with the self
tapping screws removed earlier.
7. Make certain that the drive belt is on the engine
flywheel pulley and idler pulleys, and retighten the
flange lock nut on the top of the frame.
IMPORTANT: Make certain that the drive belt is seated
correctly and that it is riding smoothly on the spindle
sheaves and is not pinched between them. Repeat the
first three steps if the belt is pinched.
You don't want the belt pinched between those spindle sheaves...trust me ;)
the manual

The question is: How remove clutch in order to remove fan mounted on its engine-side face.

• Generally, the clutch drive half shaft must be uncoupled from coolant pump (impeller drive) half shaft using special wrench kit available as loaner from AutoZone (free with $79 approx deposit).
• Best done after shroud & radiator remove after coolant drained.

1. Uncouple coolant pump and fan clutch drive shaft(s) as follows:
   
   1. span across combo-pulley-sheaves-unit mounting bolt heads with large tool kit wrench, and
   2. span inline clutch coupling nut with small tool kit wrench. Then,
   3. turn small wrench (and coupling nut) CW while resisting with large wrench (CCW) to turn coupling nut until disengaged from coolant pump drive shaft.
2. Remove fan/clutch assembly.
3. Note direction of mounted fan hub and fan blades orientation to ensure proper re-assembly.
4. On rear of clutch assy, remove 4 bolts to disengage and remove fan.
5. Assemble new fan to clutch (or, preferably, new clutch and new fan) using new bolts and washers provided with fan.
6. Couple fan-clutch assy to coolant pump drive shaft as per opposite of uncoupling step 1, above. (Turn inline nut CCW to tighten...30 ft-lb.
7. Check that fan can be hand turned...CW.)
8. Rest shroud over and onto fan.
9. Replace radiator; remount shroud; reclamp hoses, and refill and air purge cooling system.

You will need to remove the pulley from the deck and using a mallet carefully knock the shaft out. There is another way that does not involve disassembly of the mandrel/spindle, you can purchase another mandrel/spindle for replacement. For me, I always break the mandrel/spindle before the bearings go out anyway.

I hope that this gets you going soon.

We are a self help / DIY type of site. We provide free and pay for service repair advice at FixYa and are not affiliated with the retailer or dealers of the Huskee LT4600.
Having said that... There are a few thing you as the operator / owner can check.
- With the unit shut off deck raised try teetering each blade up and down by lifting and pressing down on the end of each blade. Watch the blade drive shaft under the mower to see if there is movement in the lower bearing area. Also watch the drive pulley above the deck to see if the blade drive shaft is moving in the mandrel. If you have noticeable moment of any blade shaft BELOW or ABOVE the Deck Base, the most likely problem is the Shaft bearings or the spindle housing (replacements not available for the spindle housing) .

See DETAIL 1 of this link:
http://www.partstree.com/parts/?lc=mtd&mn=13AJ771G031+%282009%29&dn=769043440018

Item 57 Bearing (2 ea) Or the spindle shaft Item 56 (1 ea) are the most like suspects.
Note the spacers Item 50 (2 ea) and Item 58 (1 ea)
A problem with any one of the above can cause the blade drive pulley to oscillate in an elliptical vs rotate true. When the pulleys oscillate they throw off the belt repeatedly.

I think your going to find movement of the blade spindle shaft(s) in the spindle housing(s)
Thanks for choosing FixYa,
Kelly

Put the blade back on the star on the shaft and tighten it down. Now you have some backup for the pulley nut. You may have to wedge a 2x4 between the blade and deck. THe EASIEST way is get an impact and zip it off. :-)