Spindle Repair Module 1
Z Master 200 Series 1. Stop the engine, remove the key, and engage the parking brake. 2. Remove covers from the cutting unit. 3. Using a floor jack raise the machine until you can access the underside of the cutting unit. 4. Support the machine using a properly rated jack stand. 5. Inspect the assembly before removing. Look for the following: Zerk Nut Hardened Washer Pulley A. B. C. 6. 7. 8. Seal Bent or damaged blade. Missing or unused grease zerk. String, wire, rope, etc.
Z Master 200 Series C. Damaged shaft - When the shaft is worn at the point where the upper bearing is located in the assembly, it is a result of the assembly running loose. Zerk Nut Hardened Washer There are two causes for this: 1. Improper torque on the pulley retention nut. This allows individual components of the assembly to move and wear against other components. 2.
Z Master 200 Series C. D. rebuilt, look for proper installation of the lower seal. Clean the bearings and look for any pitting or flaking on the rollers. Roll the clean bearings in your hand and feel for rough spots. If the bearing catches or the rollers get stuck in the cage, replace the bearing. Zerk Nut Hardened Washer Pulley Note: With this spindle design, both bearings and bearing cups must be replaced as a set. Even if only one of the two bearings is damaged. Seal 13.
Z Master 200 Series Note: D. E. Note: If using compressed air to dry the bearing after cleaning, DO NOT allow it to spin. The bearing could come apart and cause serious injury. Always wear safety glasses. Zerk Nut Hardened Washer Spindle housing for damage or wear. Pulley assembly, if the shaft shows signs of wear inspect the pulley for excessive wear in the splines. If excessive wear is found, replace the pulley. Excessive wear of the splines will show up as sharp edges on the splines.
Z Master 200 Series enough lubrication. Pack the bearing by hand or use a bearing packing tool. 20. With the spindle upside down, set the lower bearing in the bearing cup. Now install the lower seal. Use a seal driver to prevent damage. Note: Zerk Nut Hardened Washer Remember to install the seal with the lip facing out. Pulley 21. With the spindle right side up, install the small "C" shaped spacer first, then the small thick spacer.
Z Master 200 Series shaft or grease will push out that opening. Zerk 28. Install the blade and torque the blade bolt to 85-110 ft/lbs. 29. Install the drive belts. Consult the machine owner's manual for this procedure. Nut Hardened Washer 30. Replace the deck covers. Pulley 31. Remove the machine from the jack stands.
Z Master 500 Series 1. Stop the engine, remove the key, and engage the parking brake. 2. Remove covers from the cutting unit. Nut 3. 4. Using a floor jack and properly rated jack stands or the Z Stand®, raise the machine until you can access the underside of the cutting unit. Inspect the assembly before removing it from the mower. Look for the following: A. B. C. Bent or damaged blade. Missing or unused grease zerk. String, wire, rope, etc. wrapped around the spindle under the deck.
Z Master 500 Series B. Damaged Shaft - when the shaft is worn at the point where the upper bearing is located in the assembly, it is a result of the assembly running loose. The cause for this is improper torque on the pulley hub retention nut. This allows individual components of the assembly to move and wear. 12. Remove the seals, note the direction the seals face. This will be important during re-assembly. The upper seal faces inward, and the lower seal faces outward.
Z Master 500 Series the cage, replace the bearing set. Note: With this spindle design, both bearings and bearing cups must be replaced as a set. 14. If replacing the bearings, use a punch and hammer to drive both of the bearing cups out of the spindle housing. Also remove the large diameter spacer at this time if spacers are to be replaced. Caution: Do not use old bearing cups with new bearings. This may cause premature bearing wear and result in failure. 15.
Z Master 500 Series Note: Note: D. E. If using compressed air to dry the bearing after cleaning, DO NOT allow it to spin. The bearing could come apart and cause serious injury. New bearings are only available in matched sets. The matched set is necessary because the bearing endplay is not adjustable. The small "C" shaped spacer is machined to specifically match the bearings in the set. The advantage of a matched set is the ability to torque the assembly to a specified value and have a preset endplay.
Z Master 500 Series Note: Remember to install the seal with the lip facing out. Nut 22. With the spindle right side up, install the small "C" shaped spacer first, then the long inner spacer. The order of these two is not critical to the performance of the spindle, but putting the thin spacer in first prevents the possibility of the open part of the spacer dropping down on the long spacer. Heavy Washer Square Key Pulley Hub Bearing Shield Seal Spacer 23. Now install the upper bearing and seal.
Z Master 500 Series 32. Install the pulley on the pulley hub and torque the bolts to 27-33 ft.-lbs. Nut 33. Install the blade and torque the blade bolt to 85-110 ft.-lbs. Heavy Washer Square Key 34. Install the drive belt. Consult the operator's manual for the proper procedure. 35. Replace the deck covers. Remove the machine from the jack stands or Z Stand®.
492-4752 October 2003
