DEALER SERVICE
The information in this section is written for dealer ser- vice personnel. The repair described herein requires special skills and tools. If your shop is not properly equipped or your mechanics are not properly trained in this type of repair, you may be time and money ahead to replace complete assemblies.
A WARNING
■Before working underneath, block mower securely. Hydraulic system leak down and failure of mechanical or hydraulic system can cause equip- ment to drop.
■Keep all persons away from operator control area while performing adjustments, service or maintenance.
A CAUTION
■Always wear relatively tight and belted clothing to avoid entanglement in moving parts. Wear sturdy,
BLADE SPINDLE REPAIR
Removal
Remove blade from spindle. Remove belt shield. Remove belt from pulleys.
Disassemble split taper bushing (located on top of pul- ley) by removing the two bolts and inserting them into the threaded holes in bushing flange. Tighten bolts alternately to remove split taper bushing. Remove key and pulley.
Remove four bolts attaching spindle to mower frame and remove spindle.
Repair Tips
As a reference point, the grease fitting is in the top por- tion of spindle housing.
To minimize wear, bearing cups, cones and sleeves are press fit to shaft and will require a press of similar device for removal.
When disassembling, support housing casting to pre- vent damage. Remove bearing cups by placing a punch in housing slots and driving out. Alternate punch
positions from side to side. Use care to prevent hous- ing damage.
Permatex 3D Aviation
Disassembly
Drive spring pin (5) out of spindle shaft (9). Support spindle in a press and push shaft (9) down through housing (2). Remove seals from housings. Remove bearing cups from housings. Remove bearing cone from spindle shaft.
Assembly
Bearing cups and cones are designed to work together. It is important to position them so bearing cone taper mates with bearing cup taper.
Lubricate new cups (7) with a light oil. Place them in spindle housing (2) so they will mate with cones (6). Seat cups (7) against machined shoulder of housing with a press or by placing a large soft drift on the flat lip and driving them into housing.
Place bottom bearing cone (6) onto spindle shaft (9) with taper up. Seat on bottom shoulder of shaft with a press.
Insert shaft and bearing cone assembly through bottom of housing (2). Fill housing cavity with a lithium grease of #2 consistency with a MOLY (molybdenum disulfide) additive.
Place top cone (6) on shaft (9), taper down.
Apply a thin coat of Permatex® to shaft area where sleeve (4) will seat.
Insert sleeve (4) on shaft (9) and press sleeve and bearing onto shaft until all bearing free play is removed and there is a slight drag (similar to adjusting the front wheel bearings on an automobile). Check by spinning spindle. It should turn freely.
Be careful not to overtighten bearings. Proper bearing adjustment is essential to good bearing life.
Should you overtighten bearings, hold spindle housing and rap spindle shaft with a lead hammer to loosen bearings. Readjust bearings until proper setting is obtained.
NOTICE
■Improper positioning of seals can cause seal failure.
15148 (Rev. 2/9/2007) | Dealer Service 15 |
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